Sub-woofer Types of Relevance

Sealed

To determine the box size for a sealed enclosure system, you will need to know the following Theile/Small parameters for the driver:

Vas = Equivalent air compliance (litres)

Qts = total Q of the driver at Fs

Fs = resonance frequency of the driver (Hz)

Choose a final Qtc (total Q of system at resonant frequency) for your design. Recommended values for Qtc are from 0.6 to 1.0. Transient response degrades with higher Qtc values, but the power handling of the system increases. A Qtc of 0.7 will usually give pretty good results, but you can use a higher figure if the subwoofer has a low resonant frequency (<20 Hz) or if it’s being designed for car use.

Then,

Qr = Qtc/Qts

Vr = Qr^2-1

Vb = Vas/Vr

Fb = Qr*Fs

F3 = Fb*((1/Qtc^2-2+((1/Qtc^2-2)^2+4)^0.5)/2)^0.5

If Qtc>(1/2)^.5

then dBpeak = 20*log(Qtc^2/(Qtc^2-0.25)^0.5)

Else dBpeak = 0

where,

Vb = net box volume (litres)

Fb = box resonant frequency (Hz)

F3 = -3dB frequency (Hz)

dBpeak = maximum peak or dip in system response

To calculate the frequency response of a sealed enclosure system, you will need to know the following:

   Fb = resonance frequency of the system

Qtc = Final Q of the system at resonance

then,

   Fr = (F/Fb)^2

dBmag = 10*LOG(Fr^2/((Fr-1)^2+Fr/Qtc^2))

where,

   F = frequency (Hz)

dBmag = SPL 1W/1M at frequency F

 

Ported

To determine the optimum box size and tuning for a ported enclosure system, you will need to know the following Theile/Small parameters for the driver:

Vas = Equivalent air compliance (litres)

Qts = total Q of the driver at its resonant frequency

Fs = resonance frequency of the driver (Hz)

Dv = internal diameter of port (cm)then,Vb = 20*Qts^3.3*Vas

Fb = (Vas/Vb)^0.31*Fs

F3 = (Vas/Vb)^0.44*Fs

dBpeak = 20*LOG(Qts*(Vas/Vb)^0.3/0.4)where,Vb = net box volume (litres)

Fb = box resonant frequency (Hz)

F3 = -3dB frequency (Hz)

dBpeak = maximum peak or dip in system responseTo calculate the frequency response of a ported enclosure system, you will need to know the following:

Vb = net box volume (litres)

Fs = driver resonance frequency (Hz)

Qts = driver Q at system resonance

Fb = box tuning frequency (Hz)

Ql = box losses (Ql=7 can be assumed for most cases)then,Fn2 = (F/Fs)^2

Fn4 = Fn2^2

A = (Fb/Fs)^2

B = A/Qts+Fb/(Fs*Ql)

C = 1+A+(Vas/Vb)+Fb/(Fs*Qts*Ql)

D = 1/Qts+Fb/(Fs*Ql)

dBmag = 10*LOG(Fn4^2/((Fn4-C*Fn2+A)^2+Fn2*(D*Fn2-B)^2))To calculate the frequency response of a ported enclosure system, you will need to know the following:

Vb = net box volume (liters)

Fs = driver resonance frequency (Hz)

Qts = driver Q at system resonance

Fb = box tuning frequency (Hz)

Ql = box losses (Ql=7 can be assumed for most cases)then,Fn2 = (F/Fs)^2

Fn4 = Fn2^2

A = (Fb/Fs)^2

B = A/Qts+Fb/(Fs*Ql)

C = 1+A+(Vas/Vb)+Fb/(Fs*Qts*Ql)

D = 1/Qts+Fb/(Fs*Ql)

dBmag = 10*LOG(Fn4^2/((Fn4-C*Fn2+A)^2+Fn2*(D*Fn2-B)^2))

Transmission Line

Usually, only drivers which have low Qts (0.25 – 0.4) , Qes (0.3 – 0.4) and Fs values are suitable for transmission line systems.

More information on transmission lines can be found

http://www.t-linespeakers.org/

http://www.quarter-wave.com/

http://brinesacoustics.com/#Why_Quarter_Wave_Pipes

 

4th Order Bandpass

Vf = net front volume (litres)

Ff = front volume tuning frequency

Vr = net rear volume (litres)

Fs = driver resonance frequency (Hz)

Qts = driver Q at system resonance

Ql = box losses (Ql=infinite (10000) can be assumed for most cases)

then at frequency F,

A = (1/Ff)^2*F^4

B = ((1/Ql+(Fs/Ff)/Qts)/Ff)*F^3

C = (((1+Vas/Vr+Vas/Vf)*Fs/Ff+(1/Qts)/Ql)*Fs/Ff+1)*F^2

D = ((1/Qts+(Fs/Ff)/Ql*(Vas/Vr+1))*Fs)*F

E = (Vas/Vr+1)*Fs^2

G = A-C+E

H = -B+D

dBmag = 20*log(F^2/(G^2+H^2)^.5)

 Folded Horn

Folded horn is similar to bandpass in air flow, but very different in design.

Tapped Horn

The tapped horn attempts to sync the front & back pressure wave together prior to the waves exiting the system. Very hard to engineer correctly, but a neat concept.

Crazed lunatic made a sub box

This thing was designed to be a coffee table and is a concept piece. It’s basically four folded horn subwoofers crammed into one symmetrical design.  If the inner chamber volume was set correctly, I think this design might work.

References:

Loud Speakers 101 http://www.carstereo.com/help/Articles.cfm
Two-Way Crossover Network Design http://www.carstereo.com/help/Articles.cfm?id=3
Multi-Way Crossover Design http://www.trueaudio.com/st_xov_1.htm
Two-way cross-over basics. What IS a crossover? http://www.mmxpress.com/technical/twoway.htm
Balanced vs Unbalanced, Passive vs Active http://www.bssound.com.au/advice/bsadvice.htm
Building your own 2nd order passive Crossover network http://www.colomar.com/Shavano/crossover12db.html
The Subwoofer DIY Page v1.1 Subwoofer Integration http://www.diysubwoofers.org/misc/sub_integration.htm
RME level adjustment +4/-10 dBu and servo balanced inputs and outputs http://www.rme-audio.com/english/aeb/index.htm
Matt’s DIY audio page http://kahuna.sdsu.edu/~tucker/diyaudio/diyaudio.html
X-overs and Bi-amping http://kahuna.sdsu.edu/%7Etucker…ramblings.html
24db/octave Linkwitz-Riley http://kahuna.sdsu.edu/%7Etucker/diyaudio/xover.html
Active Crossovers for DIY Speaker Builders http://www.snippets.org/filters/crossover.htm
THIEL SmartSub Controller – “Do I need a crossover?” http://www.thielaudio.com/THIEL_Web/…needxover.html
The HS500. The most powerful plate subwoofer amp available to the DIYer today http://www.adireaudio.com/diy_audio/…iers/hs500.htm
Integrating A Subwoofer With Your HiFi http://www.audioetc.tv/articles/inte…erwithhifi.htm
Subwoofers for Music – EXCELLENT http://www.soundstage.com/maxdb/maxdb200101.htm
Google search – subwoofer low frequency cut-off filters (e.g. 16Hz…) http://www.google.com/search?hl=en&i…ut-off+filters
Why is it so difficult for subwoofers to blend into a system? http://www.vandersteen.com/pages/Answr9.htm
The Marriage Between the Subwoofer and Tower Speakers http://www.audioholics.com/techtips/…fer_towers.php
ACI Subwoofer Primer http://www.audioc.com/information/subwoo.htm
It is common knowledge that crossovers contribute to coloration http://www.merlinmusic.com/reviews/hfr_495.htm
SPEAKER PASSIVE CROSSOVER ASCENSION http://www.jensencapacitors.com/audi…s/artikel.html
“crossoverless” speakers http://www.onhifi.com/askwes/ask0014.htm
Removal of the crossover eliminates phase & group delay distortion http://www.brentworth.com/
and delivers a musical performance that has every nuance preserved
Why horns http://www.hornspeakers.info/
Adire Audio – Maelstrom http://www.adireaudio.com/diy_audio/…/maelstrom.htm
Neutralizing L(e) with a Zobel Network http://www.trueaudio.com/st_zobel.htm
Subsonic Filters are high-pass crossovers centered around 25-30Hz http://www.rockfordfosgate.com/scrip…php?p_faqid=68
subwoofer subsonic filters – Google search http://www.google.com/search?hl=en&i…bsonic+filters
SVS Amp Interface by Marchand Electronics http://www.svsubwoofers.com/marchandsubsonic.htm
No need for subsonic filtering – sealed design http://www.danmarx.org/audioinnovation/theories.html
Sealed Subwoofers http://www.acc.umu.se/~sagge/audio/1259/
Sealed Speaker Enclosure Design Calculator http://www.loudspeakers101.com/SealQtc.htm
How The Linkwitz Transform Circuit Works – and qtc .707 sealed subwoofer http://sound.westhost.com/linkwitz-transform.htm
Therefore a hipass or “subsonic” filter, even for sealed boxes, could help reduce distortion http://www.diysubwoofers.org/projects/cartf/
Sealed Box Subwoofer http://home.insightbb.com/~stephenwm…_Subwoofer.htm
Marchand WM8 “BASSIS” Bass Correction Equalizer http://www.marchandelec.com/wm8.htm
The sealed system provides the best group delay numbers http://www.adireaudio.com/tech_papers/sub_gd.htm
Phase, Time and Distortion in Loudspeakers http://sound.westhost.com/ptd.htm
speaker sub enclosures http://www.madisound.com/
REL Strata III Subwoofer review – let mains run full! http://www.21stcenturyservices.com/audio/REL_Strat3.htm
The Perfect Subwoofer http://www.21stcenturyservices.com/audio/perf_sub.htm
Extended Low Frequency or ELF – mains run full… (active sub) http://sound.westhost.com/project48.htm
Thiele – Small Analysis of Loudspeaker Enclosures http://www.silcom.com/~aludwig/Sysde…l_analysis.htm
250W SUBWOOFER AMPLIFIER w/REMOTE CONTROL http://www.partsexpress.com/pe/pshow…=300-793&DID=7
subwoofer Class D – Class AB amplifier http://www.xcs.no/index.php?artikkelid=67&back=1
KGND-52100 Powered Subwoofer Amplifier Class D 1000 Watts @ 4 Ohms http://www.madisound.com/kgnd.html
Velodyne SPL-800 Class D subwoofer amp review http://www.audioholics.com/productre…SPL800-p3.html
subwoofer in and out of phase, phase reversing – Google search http://www.google.com/search?hl=en&i…=Google+Search
Audioreview – subwoofers http://www.audioreview.com/Subwoofers/PLS_2741crx.aspx
Welcome to Madisound Speaker Components! http://www.madisound.com/
The Subwoofer DIY Page v1.1 Definitions http://www.diysubwoofers.org/misc/dumax/dumax.htm
Updated NOUSAINE subwoofer data list http://www.avsforum.com/avs-vb/showt…light=nousaine
Updated NOUSAINE subwoofer data list http://members.cox.net/frankcarter/T…Sub%20Data.htm
True Balanced outputs http://www.avsforum.com/avs-vb/showt…hreadid=301971
subwoofer calibration system – software http://www.etfacoustic.com/
Adire Maelstrom Speakers Review by Pland http://www.audioasylum.com/audio/spe…ges/97841.html
THE ANCIENT AUDIOPHILE’S QUEST FOR THE ULTIMATE HOME SYSTEM http://invalid.ed.unit.no/~dunker/ultimate.html
ð Speakers Frequency Response http://www.pispeakers.com/PiGraph.htm
Multiple Subs http://www.avsforum.com/avs-vb/showt…hreadid=298137

Biamplification basics – an article http://www.audioasylum.com/audio/gen…ges/57210.html
DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm
DIY Loudspeaker Designer’s Selection Guide (the LDSG) http://ldsg.snippets.org/index.php3

Section 7 – Recommended drivers http://ldsg.snippets.org/sect-7.php3
Recommended drivers technical specifications http://ldsg.snippets.org/sect-12.php3
Appendix A – Loudspeaker Design http://ldsg.snippets.org/appdx-a.php3
LDSG Appendix A – Enclosure designs http://ldsg.snippets.org/boxes.php3#SEALED
Section 17 – Suppliers of prefabricated enclosures http://ldsg.snippets.org/sect-17.php3
Section 16 – Recommended louspeaker kits and plans http://ldsg.snippets.org/sect-16.php3

Speakerbuilding.com http://www.speakerbuilding.com/content/1014/page_5.php
Home Audio DIY Speaker FAQ http://www.lalena.com/audio/faq/speaker/
Details of the VR-6 and VR-8 Technology http://www.vonschweikert.com/vrline/VR-6W.HTM
JPO Speakerbuilding Linklist http://members.chello.se/jpo/
Try downloading a program like WinISD Pro alpha http://www.linearteam.dk/
Welcome To DIYSPEAKERS.NET http://www.diyspeakers.net/
spherical cermaic speakers – least distortion http://www.zako.com/techrev.htm
How to Design a Sealed Loudspeaker? – Qts, Fs sealed speaker enclosure… http://gecko.gc.maricopa.edu/~jmurba…dio/sealed.htm
Thiele-Small Terms and Definitions or just “T/S Parameters” http://www.mmxpress.com/technical/terms.htm
Zobel Networks, speaker design http://www.adireaudio.com/tech_papers/tech_central.htm
Speaker design calculator http://www.mhsoft.nl/spk_calc.asp
Neutralizing L(e) with a Zobel http://www.trueaudio.com/st_zobel.htm
Initial Enclosure and Crossover Designs – Zobel network http://www.angelfire.com/electronic/…modelling.html
Passive Crossover Basics – Zobel Networks http://www.eatel.net/~amptech/elecdisc/xoorder.htm
Crossover Design http://www.silcom.com/~aludwig/Sysde…ove_Design.htm
Sample 3 Way Crossover http://www.lalena.com/audio/faq/xover/
DIY audio homepage http://www.lalena.com/audio/
The Loudspeaker Design Cookbook – $39.95 http://www.amazon.com/exec/obidos/tg…91827?v=glance
Part II: Digital Filters* http://www.silcom.com/~aludwig/Signa…al_filters.htm
Design of the Sound System http://www.silcom.com/~aludwig/Sysde…und_system.htm
Crossover Design http://www.silcom.com/~aludwig/Sysde…ove_Design.htm
Construction of the Loudspeakers http://www.silcom.com/~aludwig/Louds…Time_alignment
DIY’ers perspective on the top-selling Bose system http://www.intellexual.net/bose.html
Design of Loudspeakers http://www.linkwitzlab.com/design_of_loudspeakers.htm
Crossovers – 1st order http://www.linkwitzlab.com/crossovers.htm
F – Group delay and transient response http://www.linkwitzlab.com/frontiers.htm#H
JBL horns, speakers http://www.usspeaker.com/
Impedance Equalization Designer Help – Zobel Networks http://www.lalena.com/audio/calculat…ual/help.shtml

3-way 1st order crossover is used in a 3-way vented enclosure system http://www.kbapps.com/audio/speakerd…xover3way.html
Slop Of The Crossover – tweeter/1st order @ 2kHz NO GOOD… http://www.caraudiogalaxy.com/caraud…pcrossover.htm
ScanSpeak tweeters – Google search http://www.google.com/search?hl=en&i…Speak+tweeters
tweeter 1st order crossover – Google search http://www.google.com/search?hl=en&i…rder+crossover
Time aligned, Phase coherent, Phase aligned, http://www.geocities.com/kreskovs/TimeAligned2.html
Transient accurate, What’s up with that.
Appendix E – Passive Crossover Components http://ldsg.snippets.org/appdx-e.php3
Crossover Demos http://www.silcom.com/~aludwig/Crossover_demos.html
Topic: 3 way 1st order crossover http://www.electrical-contractor.net…ML/000006.html
Transient Perfect 2nd Order Crossover http://www.geocities.com/kreskovs/CrossoverdocN.html
3-Way Series Cross-Over http://users.tpg.com.au/users/gradds…oss-overs8.htm
3-way 1st order crossover – Google search http://www.google.com/search?hl=en&l…rder+crossover
cascading 1st order slopes http://www.mindspring.com/~chucksaudio/eqptrept.htm
Linkwitz-Riley Active Crossovers up to 8th-Order: An Overview http://www.rane.com/note119.html
Very High Quality DIY speakers anywhere? http://www.avsforum.com/avs-vb/showt…hreadid=170942
A full 300W into 4 Ohms, this CLASS D unit runs very cool http://www.adireaudio.com/diy_audio/…iers/dt300.htm
DIY parts, tech site http://www.partsexpress.com/
Understanding and Designing Passive and Active Crossovers http://www.termpro.com/articles/xover.html
Designing Passive Crossovers http://www.termpro.com/articles/xover2.html
Crossover Component Selection Guide http://www.partsexpress.com/resources/xover.html
A Different Approach to Series Networks http://www.geocities.com/jonrisch/LBIseries.htm
L-Pad Designer Help http://www.lalena.com/audio/calculator/lpad/help.shtml
Impedance Equalization Designer Help http://www.lalena.com/audio/calculat…ual/help.shtml
Inductors, Capacitors, & Resistors http://www.lalena.com/audio/electronics/rcl/
chart of the frequency range of various instruments http://www.silcom.com/~aludwig/Sysdes/Musicsp.gif
Music and The Human Ear http://www.silcom.com/~aludwig/EARS….e_vs_objective
Fostex Speaker Components – mid-hi drivers http://www.fostex.com/index2.asp?fil…nge/full_range
Fostex Speaker Components – mid-hi drivers http://www.madisound.com/fostex.html
Thiel CS7.2 Specifications 4-way system http://www.thielaudio.com/THIEL_Web/Pages/cs7_2.html
Sealed box – resonance hump (Zobel Networks) http://www.speakerworkshop.com/SW/Pr…losure%20A.htm
Filters, Zobel Network calculator……….. http://users.telenet.be/educypedia/e…torsfilter.htm
The Naked Truth about Speaker-Cables http://www.tnt-audio.com/clinica/spkcbl_e.html
The Naked Truth about Interconnect Cables http://www.tnt-audio.com/clinica/intere.html
Series Notch Filter Designer Help http://www.lalena.com/audio/calculat…tch/help.shtml
Passive Radiator Enclosures: In Theory and In Practice http://momentum.soundillusions.net/august02/tech2.html
RLC circuits match transmission lines to loads http://www.e-insite.net/ednmag/archi…97/08di_05.htm
How well do Zobel circuits stabilize the impedence of a driver? http://www.geocities.com/vyque/Caraudio/passives3
Driver Attenuation Circuit – L-Pad http://www.loudspeakers101.com/Lpad.htm
Loudspeakers 101 main page http://www.loudspeakers101.com/Sound.htm
Maximum Power (Resonance) in Series RLC Circuits http://www3.ltu.edu/~s_schneider/phy…esonance.shtml
Solen printed circuit boards – Lpad http://www.solen.ca/pcb2way.htm
“predicted” impedance http://www.lonesaguaro.com/speakers/…lImpedance.gif
L-PADS – calculator!!!!!!!!!!! http://www.eatel.net/~amptech/elecdisc/lpad.htm
Series crossovers, how do they work? And parallel circuits http://home.hetnet.nl/~geenius/Crossover.html
Simplest is best! 1st order, 6dB/octave slope http://members.myactv.net/~je245/spktips.htm
SoundEasy V8.00 has been released – $249.95 http://www.audioxpress.com/bksprods/sotware/sof-sou.htm
First Order (6db/octave) Two-Way Crossover calculator http://ccs.exl.info/calc_cr.html
Unibox software – Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubtxt.htm
Unibox software – Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubdwnld.htm
Series vs. Parallel Wiring http://www.termpro.com/articles/spkrz.html
FRD Consortium is group of designers, experts, hobbyists and programmers http://www.pvconsultants.com/audio/frdgroup.htm
FM (Filter Maker) is a utility for creating Digital Filter Transfer Functions http://www.pvconsultants.com/audio/dsp/dplay.htm
Plotting a Speaker’s Impedance: http://www.eatel.net/~amptech/elecdisc/resvsimp.htm
LMS – Loudspeaker Measurement System – $1395 http://www.linearx.com/products/anal…LMS/LMS_01.htm
Passive Crossover Basics http://www.eatel.net/~amptech/elecdisc/xoorder.htm
speaker crossover design software – GOOGLE search http://www.google.com/search?hl=en&l…esign+software
plotting speaker’s impedance – GOOGLE search http://www.google.com/search?hl=en&i…%27s+Impedance
loudspeaker simulation software – GOOGLE search http://www.google.com/search?hl=en&i…=Google+Search
The gold standard in analog/digital simulation – Micro-Cap 7 http://www.spectrum-soft.com/demo.shtm

True Audio – Welcome to the Loudspeaker Design Center! http://www.trueaudio.com/win_abt1.htm
Loudspeaker Design Tutorial cont.: Page 3 http://www.trueaudio.com/about_3.htm…ce%20Response_
About WinSpeakerz http://www.trueaudio.com/win_abt1.htm
Multi-Way Crossover Design http://www.trueaudio.com/st_xov_1.htm
Tech topics http://www.trueaudio.com/st_index.htm
True Audio’s WinSpeakerz Design Software review +book review!!!!! http://www.hometheaterhifi.com/volum…ctober-99.html
TrueRTA does not have gating (below 300-500Hz measurements) http://home.new.rr.com/zaph/audio/audio-speaker11.html
Input and output sampling rates are adjustable up to 48kHz http://www.soniccontrol.com/news/feb…rueaudio.shtml

Also, Oscilloscope for Windows http://polly.phys.msu.su/~zeld/oscill.html
Techron TEF-20 analyzer – acoustic measurements http://www.speakerbuilding.com/content/1014/page_8.php
A summary of recommended speaker design software packages http://ldsg.snippets.org/appdx-c.php3
SOUNDEASY v. 8.00 JUST RELEASED http://www.audioxpress.com/bksprods/sotware/sof-sou.htm
Version 8.00 New Features and Improvements http://www.audioxpress.com/resource/…fsouimprov.htm
SoundEasy V8.00 has been released http://www.e-speakers.com/
SoundEasy V8.00 has been released – about the programs http://www.interdomain.net.au/~bodzio/
SoundEasy V8.00 has been released – about the programs http://www.interdomain.net.au/%7ebodzio/
SoundEasy V8.00 – import from PC-based measurement systems http://www.interdomain.net.au/~bodzio/
SoundEasy (which I use to model things like non-linear distortion, etc.) http://www.speakerbuilder.net/web_fi…ts/DBP/dbp.htm
SoundEasy – Yahoo users e-group http://groups.yahoo.com/group/SoundEasyuserslist/
EasyLab – Advanced is an expanded section of SoundEasy http://www.interdomain.net.au/~bodzio/

Small-signal parameter of the Dayton 295-300 woofer http://www.speakerbuilder.net/web_fi…ts/DBP/dbp.htm
small signal and large signal analysis http://www.ht-audio.com/e-topic9.htm
difference between small signal model and large signal model? http://www.elektroda.pl/eboard/topic56704.html

LSP CAD – justMLS PC-based measurement system http://home.earthlink.net/~etunstal/diy.htm
LspCAD is short for Loudspeaker Computer Aided Design http://www.ijdata.com/intro.html
LspCAD official site http://www.ijdata.com/
using JustMLS and LSPCad http://www.lonesaguaro.com/speakers/Topaz/Topaz.htm
using JustMLS and LSPCad – excellent measurements tutorial http://www.geocities.com/kreskovs/John1.html
Girardin mic Liberty Instruments http://www.libinst.com/us_domestic_pricing.htm
DIY Speaker Testing Microphone Preamp – Take 2 http://www.gti.net/wallin/audio/preamp2/preamp2.html
True Audio TrueRTA – How might I use a Real Time Audio Analyzer? http://www.trueaudio.com/rta_faq1.htm
Panasonic microphone caplets http://www.panasonic.com/industrial/…ts/rec_mic.htm
A DIY Speaker Testing Microphone http://www.speakerbuilder.net/web_fi…diymicmain.htm
MIC-01 and MIC-02 are low cost precision condenser electret microphones http://www.e-speakers.com/products/clio.html
CLIO MIC-01 – $233.80 Lite – or our own Mitey Mike II http://www.audioxpress.com/bksprods/kits/kc-cliom.htm
“all in one measurement jig” http://www.ijdata.com/justMLSjigCharlesRydel.pdf
audio measurement supplies http://www.audioxpress.com/bksprods/kitsindex.htm
OMP/MF Mono Power Amp Modules from BK Electronics http://www.audioxpress.com/bksprods/kits/km-14a.htm
Power Amp Modules ILP Direct Ltd, UK http://www.audioxpress.com/bksprods/kits/ki-hy2000.htm
Developing a DIY speaker inspired by the Wilson Audio X1 SLAMM http://www.cliowin.com/FOTO/gpphoto/Hancock/slamm.htm

Linkwitz – Panasonic omni-directional back electret microphone cartridge http://www.linkwitzlab.com/sys_test.htm#Mic
Loudspeaker Systems Using CALSOD 3.10 http://www.sonicdesign.se/calsinfo.html
Comparison of calculated and measured SPL curve [in half-space]
of a Vifa P17WJ-00-08 woofer http://www.geocities.com/f4ier/xoversimFAQ.htm
“Calibrating” your Radio Shack SPL meter http://www.speakerworkshop.com/forum…opic.php?t=610
QuickMix – setting the audio mixer on your Windows computer http://www.msaxon.com/quickmix/index.htm
Speaker Workshop Project Main http://www.speakerworkshop.com/SW/Project/Main.htm
How to use Speaker Workshop from Audua http://www.gti.net/wallin/audio/audua/audua.html
Speaker Workshop by Audua web site http://www.speakerworkshop.com/
JIG II and Speaker Workshop http://www.gti.net/wallin/audio/SW/SW.html
DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm
CLIOwin home page http://www.cliowin.com/index.htm
CLIOWin Lite Electroacoustic Measurement System http://www.audioxpress.com/bksprods/kits/kc-cliom.htm
Acoustic links – MANY!!!!!!!!!!!!!!!!!!!! http://groups.yahoo.com/group/acoust…_001014290697/
Measurement Systems http://members.aol.com/nameaudio/links/measure.htm
Liberty Audiosuite
frequency response of the tweeter measured on a LAud setup http://www.io.com/~patman/s2.html
North Creek Music Systems – DIY matched drivers http://www.northcreekmusic.com/LoudspeakerProjects.html
SpectraPLUS 2.32 SpectraPRO 3.32 SpectraLAB 4.32 – home page http://www.cetaceanresearch.com/analysis.html
HobbyBox German home page http://www.audio-software.de/hobbybox_v_5_mls.html
LspLab home – English home http://hem1.passagen.se/johnygre/ENG/index.htm
LspLab home – $400 with mic http://hem1.passagen.se/johnygre/ENG/index.htm

Sample Champion is an accurate and easy to use audio measurement software http://www.purebits.com/scoverview.html
Sample Champion Application notes – Impulse and Frequency Response http://www.purebits.com/appnotes.html
Impedance measurement and Thiele-Small parameters computation http://www.purebits.com/appnote16.html
Impedance measurement: pratical construction of the connector http://www.purebits.com/appnote17.html
Speaker Measurement Jig – chose Sample Champion http://www.raymondaudio.nl/projects/…/project9.html

PC Sound Card Page http://www.epanorama.net/links/pc/sound.html
The Subwoofer DIY Page v1.1 Measurements http://www.diysubwoofers.org/measure.htm
How do i measure the TS parameters of a misc driver? http://www.diysubwoofers.org/cgi-bin…&msg_num=34170
Acoustic Measurement Software http://www.me-au.com/measure.html
ETF3.0 is a software application designed to aid in the tuning of sound systems http://www.me-au.com/etf.htm
SPL calculations http://www.adireaudio.com/tech_papers/spl.htm
How many components? Well, the crossover…. http://www.adireaudio.com/tech_paper…crossovers.htm
Software for Speaker Design http://melhuish.org/audio/software.htm
Driver manufacturers http://www.speakerbuilding.com/drivers/
“close tolerances with their actual/advertised Thiel/Small parameters” – NOT!!! http://www.ellisaudio.com/technology.htm

DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm
FAQ: Frequently Asked Questions about Praxis http://www.libinst.com/praxfaq.htm
So, what does the AudPod do? http://www.libinst.com/praxfaq.htm#t7
Liberty Instruments home page – Praxis, AudPod system http://www.libinst.com/
Re: T/S parameters – Praxis http://www.libinst.com/_disc2/00000033.htm
Praxis forum http://groups.yahoo.com/group/laudus…1?viscount=100
DIY Speaker Testing Microphone Preamp – Take 2 http://www.gti.net/wallin/audio/preamp2/preamp2.html

Golden Ratio speaker design http://www.cs.northwestern.edu/~pdin…s/designs.html
Irrational numbers and cabinet design http://www.soton.ac.uk/~apm3/diyaudio/Irrational.html
Spherical Speakers http://www.oddnoise.com/spheres.html
Cabasse iO spherical satellite system http://www.cabasse.com/english/io/
Gallo spherical speakers http://www.anthonygallo.co.uk/productindex.html
Spherical speaker design http://www.zako.com/techrev.htm
Zako ZM99 bowling ball ceramic spherical speakers review – 3 stars http://www.hifichoice.co.uk/review_print.asp?ID=1652
TRIO Classic perfectly reflects the dynamics of the spherical horns http://www.gtaudio.com/speakers.html
Avantgarde Acoustic Uno Series Two loudspeaker: Robert Deutsch review http://www.stereophile.com/showarchives.cgi?287:11
stuffing/damping material lowers Q, Fs – same as increasing enclosure volume http://www.wmeckle.com/1259/1259.htm
stuffing/damping material lowers Q, Fs – same as increasing enclosure volume http://www.danmarx.org/audioinnovation/theories.html
A Hell of a Show – spherical speakers “with balls” http://www.soundstage.com/audiohell/audiohell200302.htm
Spherical piezoelectric ceramic speaker http://www.murata.com/news/1996/0423e.html
Artistic Audio Möbius – ball perched atop a shiny, fork-shaped tuning stand http://www.smr-home-theatre.org/ces2…mage_008.shtml
Artistic Audio Möbius – ball perched atop a shiny, fork-shaped tuning stand http://www.artisticaudio.com/mobius.asp

Odyssey Setup & Tweak Tips http://odysseyaudio.com/setup_tweak.html
Audio links page, DIY… http://joemacjr.home.att.net/diyproject/links.html
speaker drivers – Seas, Vifa… http://www.linkwitzlab.com/orion_challenge.htm
VonSchweikert Audio VR 2 Speakers Review by ka7niq http://www.audioasylum.com/audio/spe…es/132286.html
Modifying the Vifa tweeter – resonance chamber stuffing, resonance Fs drops http://www.io.com/~dylan/speakers/vifas.html
Robin Marshall: A Modicum of Genius – tweeters, resonance, low Q… http://www.stereophile.com/showarchives.cgi?567:3
2.1 Driver Evaluation in Closed Boxes http://www.trueaudio.com/about_2.htm
Tempest application notes – Bessel .577, Butterworth .707 Qtc http://www.adireaudio.com/Files/Seal…plications.PDF
FRD Consortium – frequency response data & tools http://www.pvconsultants.com/audio/frdgroup.htm
Section 1 – Driver guidelines http://ldsg.snippets.org/sect-1.php3
Linear Team – WinIsd 4.x Beta & Alpha Pro – driver database http://www.linearteam.dk/default.aspx?pageid=winisdpro
WAV-Normalizer – not that good – Maximizes volume level in multible wav-files http://www.linearteam.dk/default.asp…=wavnormalizer
Drivers are listed in alphabetical order http://melhuish.org/audio/drivers.htm
UNDERSTANDING LOUDSPEAKER DATA http://www.eminence.com/eminence/pag…s02/params.htm
Klipsch RF-7 specifications http://www.reliableaudiovideo.com/kliprf7newmo1.html
Klipsch RF-7 specifications http://www.klipsch.com/product/product.aspx?cid=362
Klipsch RF-7 reviews http://www.audioreview.com/PRD_129356_1594crx.aspx
Recommended horn tweeters summary: http://ldsg.snippets.org/sect-10.php3
“How to eliminate low frequency noise cancellation with proper woofer placement.” http://www.audiovisualdevices.com.au…ey/woofer.html
How crucial is the localization near the floor? http://www.speakerbuilding.com/content/1039/page_2.php
The Oris Horn Page http://www.welbornelabs.com/oris.htm
The horn speaker home page http://invalid.ed.unit.no/~dunker/horns.html
Specs for JBL drivers http://invalid.ed.unit.no/~dunker/jblspecs.html
The Ambiophonic method is applicable to two-channel sources http://www.ambiophonics.org/
Capacitors in Crossover Network http://www.audioasylum.com/forums/hu…ges/57036.html
The Maya Horn System, Oris horns… http://www.moondogaudio.com/products.htm
Modification of a Klipsch horn (bass) http://www.speakerbuilding.com/content/1032/
Meridian DSP6000 digital amp built in! http://www.avguide.com/product/Main_…SP6000/220.jsp
Tetra Realism™ loudspeaker – Acoustic Reality http://www.acoustic-reality.com/Tetra/text3.htm
The Whomp – it achieves a -3db point of 27hz (-10db @ 20hz) http://www.selahaudio.com/whomp.html
Rear-Loaded (Bass) Horns http://melhuish.org/audio/enclosurehornrear.htm
Basic Horn Theory http://melhuish.org/audio/horn.htm
Avantgarde USA home page http://www.avantgardeusa.com/
Avantgarde’s bass systems – Subwoofer SUB225 CTRL PRO http://www.avantgardeusa.com/bass.html
Avantgarde DUO Description http://www.avantgardeusa.com/duo.html
ORIS systems around the world http://www.bd-design.com/en-gb/pg_12.html
BD-Design driver manual for Oris horns http://www.bd-design.com/
Horn foldings (many many designs for BASS HORNS) http://www-user.uni-bremen.de/~carni…hornfolds.html
Accuton C² 44/8 midrange driver http://www.speakercity.com/accuton/C2%2044.shtml
German supermen shatter the laws of physics… again! (bass horns) http://db.audioasylum.com/cgi/m.pl?f…rn&r=&session=
Madisound discussion forum http://www.madisound.com/cgi-bin/discuss.cgi
Ultimate tweeters http://ldsg.snippets.org/vendors/scan-spk.php3
Horns (or why I use horns) http://ldsg.snippets.org/HORNS/horns.html
Solid state amps and horns DON’T MIX! http://www.aloha-audio.com/library/Tube_Fest_Talk2.html
RE Designs LNPA-150 monoblock transistor amplifiers http://www.redesignsaudio.com/LNPA150.html
RE Designs LNPA-150 monoblock transistor amplifiers http://www.aloha-audio.com/library/Tube_Fest_Talk2.html
Monarchy SE-100 delux Mono Power Amplifiers $2,358/pr http://www.monarchyaudio.com/SE100-5.htm
Compression driver and horn/lens assembly guidelines: http://ldsg.snippets.org/sect-6.php3#EMINENCE-C
The Ariel – By Lynn Olson A Brief Note about Efficiency http://www.audiokit.it/ITAENG/KitDif…ArielEffic.htm
The Ariel History By Lynn Olson http://www.audiokit.it/ITAENG/KitDif…ielHistory.htm
Do it Yourself Tube Audio – A Glowing Hobby – subwoofer for Ariel http://www.teresaudio.com/haven/
Adire HE10.1 Kosala Speakers Review by Gene H http://www.audioasylum.com/audio/spe…es/109656.html
Horns and High-Efficiency Systems, speaker types…!!! http://www.aloha-audio.com/library/speaker-design1.html
Audio Asylum – search page http://db.audioasylum.com/
Symetrix SymNet™ Audio Matrix is a family of network linkable audio matrix DSP processors http://www.symetrixaudio.com/SymNet_Web/index.htm

HOME THEATER has a new SUBWOOFER LEVIATHON!!!!! Must read! http://www.avsforum.com/avs-vb/showt…ighlight=Bdeap
In Reply to: lab12 vs SHIVA on basshorn – Bdeap bass horns http://www.audioasylum.com/forums/HU…ges/55423.html
Tumult driver, Bdeap sub….. http://www.avsforum.com/avs-vb/showt…ap#post2746806
Gallo Acoustics Due, MPS Speaker System http://www.audiorevolution.com/equip/gallo/
B&W subwoofer – shape http://www.bwspeakers.com/index.cfm/…7F00D0B7473B37
Loudspeaker driver database http://www.thielesmall.com/
Pjay’s Speaker building page – driver database http://members.aol.com/_ht_a/pjay99s…eakerhome.html
High sensitivity tweeters http://www.madisound.com/cgi-bin/dis…gi?read=272585

AKG Hearo 999 – headphone amp – center channel effects http://headphone.com/layout.php?topi…tID=0010120999
Headphone site http://www.head-fi.org/
Headphone site http://headphone.com/layout.php?topicID=1
Headphone software http://www.akg.com/products/powersla…nguage,EN.html
Speakers – woofer facing up http://www.blackdahlia.com/samadhi/cbae.htm
World’s Most Expensive Hi-Fi System?!! http://www.avsforum.com/avs-vb/showt…hreadid=295441
Crown K2 class D digital amps – subwoofer
Loudspeaker Technology – cubes, spheres, standing waves……………… http://www.norh.com/about/tech/
B-Deap, Servodrive subwoofer http://www.servodrive.com/SPL-bdeap32.html
Balanced vs. Unbalanced Cables http://www.wpi.edu/Academics/Depts/H…bal-unbal.html
Impedance, damping factor myth, balanced vs. unbalanced connections… http://sound.westhost.com/impedanc.htm
DENOMINATIONS ABOVE ONE MILLION – American & British systems http://www.webster.com/mw/table/number.htm
Series vs. Parallel Crossover Networks http://sound.westhost.com/parallel-series.htm#1.3
Audiophile Capacitors http://sound.westhost.com/cables-p5….e%20Capacitors
Speaker design books and reviews http://www.amazon.com/exec/obidos/AS…699345-1453419
Class A amplifiers http://sound.westhost.com/class-a.htm
B&W Nautilus 801 loudspeaker outdoor listening test http://www.tnt-audio.com/casse/bw801e.html
Gershman Acoustics Avant Garde RX-20 reviews http://www.audioreview.com/PRD_119559_1594crx.aspx
Mirage Loudspeakers http://www.miragespeakers.com/omnipolar_tech.shtml
JBL Studio Monitors http://www.proaudiosystems.co.uk/aca…itors_162.html
StealthBoxz – sub enclosure, standing waves… (car sub) http://www.auto-acoustics.co.uk/faq3.htm
Google search – subwoofer internal standing waves http://www.google.com/search?hl=en&l…standing+waves
axial, tangential and oblique standing waves http://www.coincidentspeaker.com/about.htm
Rane PE-17 Five Band Parametric Equalizer – for subwoofer (balanced only) http://www.svsubwoofers.com/ampeq_rane_pe17.htm
Center channel speaker(s) http://www.avsforum.com/avs-vb/showt…47#post1230047
Near field surround system http://www.mkprofessional.com/pdf/mps-422.pdf
Comb filtering effect http://www.asc-hifi.com/acoustic_basics.htm#2
Speakers around TV set – uggghhh… http://www.mkprofessional.com/pdf/mps-422.pdf
spherical and egg shaped loudspeaker enclosures http://www.usenclosure.com/cst-oem.htm
Wiremold power strip http://www.naimusa.com/power.html
Behringer (sp?) DSP 1124 is a great piece of equipment to eq a sub http://www.avsforum.com/avs-vb/showt…hreadid=312010
Tannoy – 3-way nearfield monitors with nearfield elliptical cabinet http://www.pro-music-news.com/html/10/e20401ta.htm
JBL S36II – molded enclosure with Elliptical Oblate Spheroidal waveguide http://www.*******.com/PID_15014.htm
JBL S312II – specifications… http://www.*******.com/PID_15090.htm
Baffle diffraction http://www.t-linespeakers.org/tech/b…tep/index.html
Loudspeaker Diffraction Loss and Compensation http://www.trueaudio.com/st_diff1.htm
Diffraction from baffle edges http://www.linkwitzlab.com/diffraction.htm
Diffraction is a difficult subject……….. http://www.linkwitzlab.com/faq.htm#Q8
AudioPrism Noise Sniffer http://www.audioprism.com/noisesniffer.html
Cabinet shape http://www.ellisaudio.com/CabinetShape.htm
Behringer Feedback Destroyer – setup http://www.snapbug.ws/bfd.htm
optimize low frequency acoustic response of rooms through trial and error measurements http://www.etfacoustic.com/demoroom.all.html
Baffle Diffraction Simulator is a design program and education tool http://www.pvconsultants.com/audio/d…ownloadbds.htm
Understanding Cabinet Edge Diffraction http://www.speakerdesign.net/understand.html
an ideal baffle is very large http://audio.sdecnet.com/diy_reflector/
Magneplanar speakers http://www.magnepan.com/
Magnepan MG20.1 vs. B&W Nautilus 801 http://www.epinions.com/content_2418516100
baffle diffraction compensation http://www.ameritech.net/users/kagato/xover1.htm
baffle diffraction compensation – Google http://www.google.com/search?hl=en&i…=Google+Search
Baffle Diffraction Theories and Practice http://www.t-linespeakers.org/tech/b…stepcompo.html
Spherical diffraction compensation http://yu-ra.tripod.com/baffle_diff.htm
crossover – with baffle diffraction loss compensation (CALSOD) http://www.geocities.com/capecanaver…/flrspkrs.html
Developing a DIY speaker inspired by the Wilson Audio X1 SLAMM http://www.cliowin.com/FOTO/gpphoto/Hancock/slamm.htm
Baffle diffraction loss http://yu-ra.tripod.com/index_general.htm
infinite baffle measurements, speakers… http://home.new.rr.com/zaph/audio/audio-speaker13.html
Diffraction – From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Diffraction
The Thiele-Small Loudspeaker Database – works w/Unibox http://www.thielesmall.com/
The “6dB Response Step”, and infinite baffle uniformity… http://www.northcreekmusic.com/NorthCreekKits.html
baffle diffraction compensation – DIY contest http://www.kaiaudio.com/diy2001/kaiopen.html
Baffle Step Equalisation http://sound.westhost.com/bafflestep.htm
Speaker dust cap http://web.mit.edu/2.972/www/reports…r/speaker.html
Speaker dust cap http://web.mit.edu/2.972/www/reports…r/speaker.html
THIEL floor-standing speakers employ a rounded baffle http://www.thielaudio.com/THIEL_Web/…ffraction.html
http://www.thielaudio.com/THIEL_Web/…phase.html</a>
The Acoustic Benefits of Phase Alignment http://www.wescomponents.com/SSS/set…s_in_a_rec.htm
The Acoustic Benefits of Phase Alignment http://www.wescomponents.com/sss/aco…hase_align.htm
Time aligned, Phase coherent, Phase aligned, Transient accurate, What’s up with that? http://www.geocities.com/kreskovs/TimeAligned1.html
Time aligned, Phase coherent, Phase aligned, Transient accurate, What’s up with that? http://www.geocities.com/kreskovs/TimeAligned2.html
Time aligned, Phase coherent, Phase aligned…. GLOSSARY http://www.geocities.com/kreskovs/TimeAligned1.html
Time-alignment measurements http://www.silcom.com/~aludwig/Time_alignment.html
Veneering Recessed Driver Cutouts http://www.audiodiycentral.com/nt_drvrcutouts.shtml
Time- and phase-correct performance – 1st order crossovers….. http://www.soundstage.com/video/reve…en_theater.htm
Baffle spacing, phase angles and time alignment, revisited http://www.audioasylum.com/forums/pi…ges/11054.html
spreadsheet for offet drivers/crossovers and phase correction… http://www.d-web.com/dbrown/db61ta/phase.xls
For starters, scrambling the waveform is JUST PLAIN WRONG! http://www.meadowlarkaudio.com/TC4.htm
Speakers with vertical baffles are NOT time coherent ! http://www.meadowlarkaudio.com/TC1.htm#1
Illustration: flat baffle, slanted baffle and point source phase responses http://www.meadowlarkaudio.com/TC1p.htm
Subject: Baffle spacing, time alignment and driver offset http://www.diysubwoofers.org/talksho…ages/33527.htm
Crossover transient response http://www.silcom.com/~aludwig/Sysde…sient_response
ALIGNED DRIVERS? http://members.chello.se/jpo/papers/align/ALIGN.html
drivers time align – GOOGLE SEARCH http://www.google.com/search?hl=en&l…ers+time+align
Subwoofer damping material http://www.diysubwoofers.org/sld/sealed4.htm
The Following is a Discussion on Stuffing a Sealed Enclosure http://www.wmeckle.com/1259/1259.htm
Acousta-stuf @ Parts Express (& damping materials) http://www.partsexpress.com/webpage….ctGroup_ID=137
HyperSonic Sound – focused sound waves http://www.atcsd.com/tl_hss.html
damping baffle panels – with ‘Router Pad’ http://www.snippets.org/alsr/const.html
Making felt front baffle diffraction pads http://t-3.cc/users/audioworx/page90DIY-FeltPads.html
Felt Rings verses Felt Blocks for Baffle Diffraction Reduction http://www.speakerdesign.net/felt/fe…vs_blocks.html
Reduce front baffle loudspeaker diffraction losses – tweaks http://www.audiotweaks.com/tweaks/tweak_284.htm
Measuring Loudspeakers, Part Three http://www.stereophile.com/showarchives.cgi?103:0
Give it a Tilt! (Tilt your speakers backwards for a new experience!) http://www.echoloft.com/articles/aug2000/tilt.htm
Measuring driver volume – Vs, Vb… http://sound.westhost.com/tsp.htm
driver displacement volume http://www.google.com/search?hl=en&l…acement+volume
driver displacement volume http://www.trueaudio.com/win_abt1.htm
The WinSpeakerz Box Calculators http://www.trueaudio.com/about_4.htm
Avantgarde Trio installations http://www.avantgardeusa.com/installations.html

Room Acoustics http://www.silcom.com/~aludwig/Room_…rrible_optimum
Subwoofer room gain….. http://www.ellisaudio.com/subwoofers.htm
Unibox – Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubtxt.htm
1.0 Introducing The Speaker Design Toolbox http://www.trueaudio.com/about_1.htm…%20WinSpeakerz
Correction Values for Radio Shack SPL Meter http://www.danmarx.org/audioinnovation/rsmeter.html
Rane PE17 Five Band Parametric Equalizer http://www.svsubwoofers.com/ampeq_rane_pe17.htm
parallel & series battery wiring schematics http://www.solarexpert.com/Batteries/batchart.html
Series vs. Parallel Crossover Networks http://sound.westhost.com/parallel-series.htm
SOS – Subwoofer Optimizer System $299.95 each http://www.speakercity.com/Sos/SubwooferOptimizer.shtml
How do you eq your sub? http://www.avsforum.com/avs-vb/showt…0&pagenumber=1
Behringer DEQ2496 Ultra-Curve Pro Mastering Processor (subwoofer) http://www.musiciansfriend.com/srs7/…p?q=ultracurve
Open Baffle Line Array Speakers http://www.geocities.com/dmitrynizh/labaffles.htm
Dipoles/open baffle – Is the “figure-of-eight” radiation better than the “conventional” radiation? http://www.roister.com/eng/faqs.htm
Room acoustics – By far the most uniform response in the range below 200 Hz http://www.linkwitzlab.com/rooms.htm
is obtained with an open-baffle, dipole or figure-of-eight radiating source
The Subwoofer DIY Page v1.1 Dipole Bass Systems http://www.diysubwoofers.org/dipole/
The Contrapunt, a dipole sub woofer. http://www.euronet.nl/users/temagm/audio/dipolesub.htm
Baffle diffraction loss http://yu-ra.tripod.com/index_general.htm
Dipole Bass – Adire Audio DPL-12 drivers http://sho.mystarband.net/BBContent/BBBass.html
2 350 Watt plate amps from Stryke Audio http://stryke.com/amplifiers.html
A Word About Enclosure Filler (sealed subwoofer) http://www.bullysubs.com/design_phil.html
Meyer Sound HD-1 : High Definition Audio Monitor http://www.meyersound.com/products/s…hd-1/index.htm

ELAC Technische Software CARA 2.0 computer program http://www.stereophile.com/showarchives.cgi?438
RPG Diffusor Systems Room Optimizer http://www.rpginc.com/products/roomoptimizer/
RPG Diffusor Systems – CATT-Acoustic v8.0 http://www.catt.se/
RPG® developed the Shape Optimizer http://www.rpginc.com/products/chaos/index.htm
ETF software is a highly accurate PC based acoustic measurement system http://www.acoustisoft.com/
CARA 2.1 PLUS (includes CARA Training CD) http://www.rhintek.com/
CARA – official site http://www.cara.de/ENU/index.html
Updated CHECK OUT the NEW CARA 2.2 http://www.reflexlabs.com/
About Acoustics http://www.reflexlabs.com/page728281.htm
ELAC Technische Software CARA 2.0 computer program review http://www.stereophile.com/showarchives.cgi?438:0
CARA Walkthrough http://www.cara.de/ENU/CARA/index.php?load=box3.html
RPG Room Optimizer http://www.sweetwater.com/store/detail/RoomOptimizer/
The Sound of Quality in Monolithic Domes http://www.monolithic.com/plan_design/sound/index.html
Bouncing Off the Walls Controlling acoustics in a Monolithic Dome http://www.monolithic.com/plan_desig…ics/index.html
Audio Systems Enhance Living Word Bible Church http://www.monolithic.com/gallery/ch…ord/index.html
Test Results Of Acoustics In Monolithic Dome Gyms Delight The Tester http://www.monolithic.com/plan_design/gym_acoustics/
EASE 4.0 – Enhanced Acoustic Simulator for Engineers – $1995 http://www.falconaudiovideo.com/
EASE 4.0 – Enhanced Acoustic Simulator for Engineers http://www.olsonsound.com/EASE/articles.html
EASE 4.0 – Enhanced Acoustic Simulator for Engineers – developer site http://www.auralisation.de/index.html
EASE 4.0 – Takes Off The Limits http://www.ada-acousticdesign.de/eas…out_ease40.htm
ODEON Room Acoustics Modelling Software (dome?) http://www.bksv.com/?ID=2154
Room Acoustics & Sound System Design Links http://www.audioscientific.com/Room_…gn%20Links.htm
JBL Professional software downloads http://www.jblpro.com/pages/software_downloads.htm

room nodes, bass cancellation, EQ… http://www.futuremusic.co.uk/fm_mmus…=6809&PageNo=5
Golden Ratio room setup http://www.audiolinks.nl/speakersetup.htm
Carvin’s SX series solid-state guitar amps – John Murphy on tube amps http://www.trueaudio.com/at_eetjlm.htm
WinSpeakerZ “complete” offer, user guide, book, software… http://www.trueaudio.com/catalog1.htm
BassBox Pro – SPHERICAL ENCLOSURES! http://www.ht-audio.com/bassbox.htm
Room interaction – reflections, absorbtion, reverb time, etc http://www.diysubwoofers.org/talksho…ages/34343.htm
Diffraction-Free Sound Waves http://www.aip.org/physnews/graphics/html/yusuke.html
ODEON Room Acoustics Modelling Software – expensive http://helmholtz.oersted.dtu.dk/~odeon//
ODEON Room Acoustics Modelling Software – expensive http://www.bksv.com/?ID=2154
EASE V3.0 http://www.jblpro.com/pages/software/software.htm
Preserving Wanted Sound, room acoustics…. – excellent! http://www.usg.com/Design_Solutions/…preserving.asp
Room Acoustics & Sound System Design Links http://www.audioscientific.com/Room_…gn%20Links.htm

Speak 2.5 – official site – $299.95 http://www.gedlee.com/speak.htm
room acoustics – curved surfaces http://www.google.com/search?hl=en&i…urved+surfaces
Room Acoustics – Design For Listening (curved surfaces…) http://irc.nrc-cnrc.gc.ca/cbd/cbd092e.html
Software links http://members.optusnet.com.au/~audiosoft/sahfsd07.txt
Room acoustics (curved surfaces…) http://www.linkwitzlab.com/rooms.htm

Infinite slope crossovers http://www.josephaudio.com/essay.islope.html
DEQX Digital Calibration Processor/Crossover http://www.deqx.com/pdc26.html

Passive Crossover Designer, free passive crossover design software – http://audio.claub.net/software/jbagby.html
FRD Consortium, more free design and modeling software – http://www.pvconsultants.com/audio/frdgroup.htm
ARTA – a powerful and free loudspeaker measurment suite – http://www.fesb.hr/~mateljan/arta/

Loudspeaker design software & hardware:
True Audio ‘Introduction to Loudspeaker Design” by John L Murphy $24.95 http://www.trueaudio.com/ild_abt1.htm
Vance Dickason’s Loudspeaker Recipes Vol. 1 $24.95 http://www.amazon.com/exec/obidos/tg…glance&s=books
Vance Dickason’s Loudspeaker Design Cookbook 6th Ed. $39.95 http://www.amazon.com/exec/obidos/tg…glance&s=books
Master Handbook of Acoustics – F. Alton Everest $27.97 http://www.amazon.com/exec/obidos/tg…10240?v=glance
David Weems’ Designing/Buidling Speaker Systems 4th Ed $13.97 http://www.amazon.com/exec/obidos/tg…glance&s=books
David Weems’ Great Sound Stereo Speaker Manual w/CD-ROM $24.47 http://www.amazon.com/exec/obidos/se…267016-9510240
Theory and Design of Loudspeaker Enclosures – J. E. Benson (out of print) http://www.amazon.com/exec/obidos/tg…10240?v=glance
Unibox free http://www.danbbs.dk/~ko/ubtxt.htm
WinISD Pro, 0.4X free http://www.linearteam.org/winisd.html
Martin J. King’s MathCAD models (Quarter Wavelength Loudspeaker Design) free http://www.quarter-wave.com/
Speaker Workshop free http://www.speakerworkshop.com/
WinMLS2000 – loudspeaker measurement $39.00 http://www.winmls.com/
SoundEasy V8.0, EasyLab, BoxCad 4.0 $225.00 http://www.interdomain.net.au/~bodzio/
True Audio WinSpeakerz $129.00 http://www.trueaudio.com/win_abt1.htm
True Audio TrueRTA Level 4 $99.95 http://www.trueaudio.com/
LspCAD, justMLS $129.00 http://www.ijdata.com/
LspCAD PRO, justMLS $495.00 http://www.ijdata.com/
BassBox & Xover Pro Version 6 (w/spherical design) $199.00 http://www.ht-audio.com/xoverpro.htm
GedLee LLC Speak 2.5 (w/spherical design, baffle diffraction) $299.95 http://www.gedlee.com/speak.htm
PureBits Sample Champion Light $99.00 http://www.purebits.com/scoverview.html
PureBits Sample Champion Pro $299.00 http://www.purebits.com/scoverview.html
PureBits Sample Champion – Impedance and Thiele Small Plugin $29.00 http://www.purebits.com/scplugins.html#anc#6
PureBits Sample Champion Pro + all Plugins Bundle http://www.purebits.com/order.html
SpectraPLUS 3.32 http://www.cetaceanresearch.com/analysis.html
SpectraPRO 3.32 http://www.cetaceanresearch.com/analysis.html
SpectraLAB 4.32 http://www.cetaceanresearch.com/analysis.html
HobbyBox V.5 (German site)
CLIOWin Lite with PCI card, signal Conditioner, and Mitey Mike II $749.00 http://www.cliowin.com/tour1.htm
LoudSpeaker LAB 2 with measurement box $310.00 http://hem.passagen.se/johnygre/ENG/main.htm
LoudSpeaker LAB 2 with measurement box including a calibrated microphone $400.00 http://hem.passagen.se/johnygre/ENG/main.htm
Liberty Instruments – Praxis, AudPod measurements, Girardin mic (also LspCAD) http://www.libinst.com/
LinearX Systems LMS – Loudspeaker Measurement System $1,395.00 http://www.linearx.com/products/ProductsTop.htm
LinearX Systems Leap5 enclosure and crossover design modules $1,490.00 http://www.linearx.com/products/ProductsTop.htm
LinearX Systems Leap5 EnclosureShop $795.00 http://www.linearx.com/products/ProductsTop.htm
LinearX Systems Leap5 Crossover Shop $795.00 http://www.linearx.com/products/ProductsTop.htm
EASE 4.0 – Enhanced Acoustic Simulator for Engineers $1,995.00 http://www.ada-acousticdesign.de/eas…out_ease40.htm
CARA 2.2 Plus, Training CD, Audio Test CD $74.95 http://www.visaton.com/cgi/VisatonFr…Artikel_ID=683
RPG Diffusor Systems Room Optimizer $99.99 http://www.rpginc.com/products/roomoptimizer/index.htm
RPG Diffusor Systems – CATT-Acoustic v8.0 http://www.rpginc.com/products/catt/
CATT-Acoustic v8.0 http://www.catt.se/
ODEON Room Acoustics Modelling Software – expensive http://www.dat.dtu.dk/~odeon/products.htm