Quarter Wavelength Loudspeaker Design Gallery
Shown below are some pictures of quarter wavelength loudspeaker designs that people have built. Some of these projects are direct copies of my designs while others are original designs generated using my MathCad worksheets. Under each picture is the builder's name and an e-mail link so you can ask questions or provide some feedback. If you have also built a quarter wavelength loudspeaker design based on my MathCad worksheets, please feel free to send me a picture for inclusion in this gallery.
Open Baffle Design Using a Fostex FE-103E Full Range Driver and an Eminence Alpha 15A Woofer
Built by Dan Hatmaker
ML TQWT Using Fostex FE-164 Drivers
Built by Jack Ha
ML TQWT Using Dynaudio Drivers
Built by Hans van Rooij
Folded ML TQWT Using the Fostex FX120 Full Range Driver
Built by Martin Paul
Open Baffle Design Using a Fostex FE-108 Sigma Full Range Driver and an Eminence Alpha 15A Woofer
The Crossover
Built by Mike Rains
The canTiLena Speaker
An 8" SS22W/8857T00 Woofer, in a single-fold 77" long ML TL, with a Morel MDM55 midrange and a Fountek NeoCD1.0 Ribbon Tweeter
Built by Paul Kittinger
ML TL Using SEAS H1212 Tweeter and a SEAS CA18RNX Woofer
Built by Peter Myers
Fostex FE-168EZ Sigma in a ML TL
Built by Rudy Vanclaire
Open Baffle Design Using a Supravox 215RTF Bicone Full Range Driver and two Eminence Alpha 15A Woofer Drivers
The Crossover and 45W Monoblock Amplifiers
Built by Carcei Vasile
The TuLines Speaker
A Pair of Dayton Loudspeaker RS180 Woofers, in separate ML TL's, with a Dayton RS52 midrange and a Fountek NeoCD3.0 Ribbon Tweeter
The Crossover is Built into the Base
Built by Paul Kittinger
ML TL Using a Jordan JX92S Full Range Driver
Built by Francesco Campedelli
ML TL Using a Hi-Vi B3N Full Range Driver
Built by Francesco Campedelli
Tapered TL Using a Visiton 120mm W100-S bass / mid and Elac DT28 Tweeter
Built by Carl Peake
Fostex FE-206E in a ML TL
Complete with name plate!
Built by Brent Frazee
Lowther DX2 in a ML TL
Phase Plug
Built by Torry Hægeland
ML TL Using the Great Plains Audio Altec 604-8H-II Driver
Owned by Stephæn. Designed by Jay Fisher and Pete Riggle, built by Pete Riggle and Stephæn.
Bob Brines' ML TL Design using the Fostex FE-167E Full Range Driver
Built by Franz Dorfmueller
Double Back Loaded Horn using the Fostex FE-126E Full Range Driver
Built by Scott Lindgren
Fostex FE-207E in a LP #9 Enclosure
Built by Hudson Miller
Back Loaded Horn using the Jordan JX92S Full Range Driver and a Super Tweeter
Built by Paul Norton
Mini MLTL HT Speaker using TB 4" Bamboo Driver
Built by Paul Norton
The Alicante Speaker
A Dayton Loudspeaker RS225 8-inch Woofer, in an 18:1 Tapered TL, with a Morel MDM55 Dome Midrange and a Vifa (Peerless Vline) XT19 Ring Radiator Tweeter
The Crossover is Built into the Base
Built by Paul Kittinger
ML TL's Using Scan Speak W21 8554's and 2905 9500 Tweeters in the Big Enclosure and Scan Speak 18W 8545's and Seas 27TDFC Tweeters in the Smaller Enclosure
Built by John Hageman
Fostex FE-167E in a ML TL
Built by Rob Flynn
MTM ML TL
Built by Jorge Omar
ML TL using the Fostex FE-206E Full Range Driver
Built by Christian Belgardt
ML TL using the Fostex FE-207E Full Range Driver
Built by Stephen Small
ML TQWT using a RCA LC1B Extended Range Coaxial and a Dynaudio T330 Esotar Tweeter
Built by Zoran Dimovski
ML TQWT using a Dynaudio 17WLQ Esotec and a Focal TC 90 TD 5 Tweeter
Built by Zoran Dimovski
CCS FR125 Full Range Drivers in a Bi Polar ML TQWT
Built by Pete Menting
A Peerless 831709 woofer in a ~12:1 "tapered" line with a LPG 50FA soft dome midrange and Eton 19SD-1
soft dome tweeter
Built by Paul Kittinger
Tangband W3-871S ML TQWT Home Theater System
Built by Yourane Ung
ML TQWT using a Lowther DX4 Full Range Driver
w/ Custom Phase Plugs
Built by Laurence Platt
Folded TQWT using a SEAS 6.5 mid/bass and Vifa Tweeter
Built by Dave Merrill
ML TL using the Fostex FE-207E Full Range Driver
Built by Ryan Bergmann
ML TQWT using the Tangband W4-657S Full Range Driver
Built by Paul Norton
Fostex FE-206E in a ML TQWT with a Variable BSC Circuit
Built by Jeremy MacLennan
Pioneer TS-A2510 in a Folded Transmission Line
Built by Pedro Leite
Fostex FE-127E in a Bass Reflex Enclosure and Fostex FE-83E in a Folded TL
Built by Jacques Cande
ML TL using the Fostex FE-206E Full Range Driver
Built by Artan Ymeri and Viktor Halili
Jordan JX92S in a Transmission Line Enclosure
Built by Steve Carlton
Fostex FX200 in a ML TL, Fostex FE-167E in a ML TQWT, and Radio Shack RS 1354 in a Folded ML TQWT
Built by Jeremy MacLennan
Home Theater Set-up Featuring a ML TL using the Fostex FE-206E Full Range Driver
Built by Ron Parsons
Folded ML TQWT using the Dai-ichi 8" Full Range Driver made in the Philippines
Built by Lerio Agner, Jr
ML TL using the Fostex FE-206E Full Range Driver
Built by Bob Schense
ML TL using the Jordan JX 92S Full Range Driver
Built by Stefano Billiani
ML TL using the Scan Speak 21W8554-00 Woofer and the Scan Speak 2905 9500 Tweeter
Built by John Hageman
Fostex FE-206E in a ML TL using a Behringer Ultra-Curve Pro DSP 8024
Built by Markku Myllyla
Fostex FE-206E in a ML TL
BSC Circuit Using Hand Wound 6 lb Air Core Inductor
Built by Leon Licer
Jordan JX92S in a ML TL
Built by Jay Fisher
Morel MW-144 and MDT-33 in a TL
Built by Tsvetan Taslakov
Fostex FX200 and FT17H Tweeter in a ML TL
Built by Bill LaDieu
Fostex FE-167E in a ML TL
Built by Scott Dunn
Fostex FE-168EZ in a ML TL
Built by Rolf Paloheimo
Lowther ML TL Using the PM2A Driver
Read about these in Scott Faller's TNT-Audio Review
Veracity ML TQWT using the G2 Ribbon Tweeter and SEAS W18EX Woofer
Built by Jim Salk
ML TL using the Supravox 215 BiCone Full Range Driver
Built by Jan Babic
ML TL using the Fostex FE-206E Full Range Driver
Built by Mike Howard
ML TL using the Lowther DX3 Full Range Driver (Recently Upgraded to a DX4)
Built by Verne Mattson
ML TL using Fostex FE-207E Full Range Driver
Built by Moray James
ML TL using the Vifa P21WO-39-08 Woofer and the Scan Speak 2905 9300 Tweeter
Built by John Hageman
ML TQWT using the Fostex FE-127E Full Range Driver
Built by Henk Koetzier
Mini ML TL using Vifa/Audax Drivers
Built by Mark Krawiec
ML TL using the Dayton 18" Woofer
Built by Allan Jones
ML TQWT using the Fostex FE-167E Full Range Driver
Built by Galin Lyubenov
Scan Speak 8554 TL
Built by Mark Krawiec
Vifa P17WG Tapered TL
Built by Raymond van Weeghel
ML TL using the Fostex FE-127E Full Range Driver
Built by Rolf Paloheimo
ML TL using the Fostex FX-200 Full Range Driver
Built by Allan Jones
Bob Brines' Fostex FE - 167E ML TL
Built by Bob Brines
ML TQWT using the Fostex FE-167 Full Range Driver
Built by Alain
ML TQWT using the Fostex FE-164 Full Range Driver
Built by Johari Yip
ML TQWT using the Fostex FE-164 Full Range Driver
Built by Thad Aerts
ML TQWT using the Lowther EX4 Full Range Driver
Built by Martyn Redwood
The Peerless Pipes
Built by Bob Brines
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