- Ack! Indusitries
- Chris Own
- Acoustic
Dreams - Bruce Fetherling & Brian Urfer
- Acoustic
Reality - Eric Heider
- Alan Hendler
- former recording engineer
- Alan Kimmel
- tube amp/preamp designer
- Art Audio
- Joe Fratus
- Atma-Sphere
- Ralph Karsten
- Audio Alchemy
- Mark Schifter
- Audio by
Van Alstine - Frank Van Alstine
- Audio Machine
& Design - Brent Riehl & Robert Maicks
- Audio Matiere
- Ron Hedrick
- Audio Note
- Herb Reichert & Michael Trei
- Audio Services
Corp. - Paul Lacey
- Balanced
Audio Technology - Victor Khomenko & Steve Bednarski
- Birdland
Audio - Gilles Gameiro
- Bizzy Bee
Tube Audio Design - Larry Musial
- Bound for
Sound - Martin DeWulf
- Cary Audio
Design - Dennis Had
- Cedille Records
- James Ginsburg & Bill Maylone
- Classic Audio
Reproductions - John Wolff
- Classic Records
- Michael Hobson & Coleman Brice
- Controlled
Thermal Processing - Rick Diekman
- Creative
Cable Concepts - Bill Eisen
- Custom Power
Cord Co. - David Blair
- David Gill
Elise DAC
- Decware -
Steve Deckert
- Dunlavy
Audio Labs - Geoffrey Poor
- Edgarhorn
- Dr. Bruce Edgar
- ELP
Laser Turntable - Sanju Chiba
- Final Laboratory
- Brian Bowdle(Venus Hi-Fi)
- Golden
Tube Audio - Frank Malitz
- Great
Northern Sound - Steve Huntley
- Grommes
Hi-Fi - Albert Shippits
- Herron
Audio - Keith Herron
- Huff
Loudspeaker Co. - John Huff
- Immedia
- Sedrick Harris
- Joseph
Audio - Jeff Joseph
- Joule
Electra - Jud Barber
- Ken
Christianson - recording engineer
- Legacy
Audio - Bill Dudleston
- Living Voice Speakers
- Brian Bowdle(Venus Hi-Fi)
- Lyman
Flook - recording engineer & college instructor
- Machina
Dynamica
- Madisound
Speaker Components, Inc. - Larry Hitch
- Marantz
- David Birch-Jones
- Marigo
Audio Labs - Ron Hedrick
- Melos
Technologies - Sedrick Harris
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- Mobile
Fidelity Sound Lab - Joe Bermudez & Thomas Enwright
- Musical
Design - John Hillig
- Naim
Audio - Chris West
- Nola - Sedrick
Harris
- Paradigm
- Jack Shafton
- Marantz
- David Birch-Jones
- Marigo
Audio Labs - Ron Hedrick
- Melos
Technologies - Sedrick Harris
-
Merlin Music Systems - Bobby
Palkovic
- Mobile
Fidelity Sound Lab - Joe Bermudez & Thomas Enwright
- Musical
Design - John Hillig
- Musical
Direct - Joshua Bizar & Bes Nievera
- Naim
Audio - Chris West
- Nola - Sedrick
Harris
- Paradigm
- Jack Shafton
- Perpetual
Technologies - Mark Schifter & Peter Madnick
- PS Audio
- Paul McGowan
- N.E.W.
- Mitch Friedman
- Ray Samuels
Audio - Ray Samuels
- Ridge Street
Audio - Robert Schult & Steve Rothermel
- Rosinante
- Ric Cummins
- SAS
Audio Labs - Steve Sammet
- SEAS
North America - John Stone
- ServoDrive-Sound
Physics Labs - Mark Seaton
& Tom Danley
- Sonic
Frontiers Anthem electronics - Jack Shafton
- SOTA
Industries - Jack Shafton
- Soundline
Audio speakers
- Sound
Lab - Dr. Roger West
- SP
Technology - Bob Smith
- Supermods
- Stan Warren (taped) & Gregg Straley
- Symphonic
Line - Klaus Bunge
- Synergistic
Research - Scott Nowak
- TacT
Audio - Peter Lyngdorf
- Technik
Avant Garde - Harry Paller
- T.G. Audio
- Bob Crump
- tmh-audio
- Jim Ricketts
- TLG Acoustical
Designs - Ken Platz
- Van
L Speakerworks - John Lan Leishout, Trent Lesher, & Charles McShane
(of AR fame)
- Venus
Hi-Fi - Brian Bowdle
- Vacuum
Tube Logic - Luke Manley
- Von
Schweikert - Mike Bosela & Rusty Taub
- Waveform
Acoustics - John Otvos
- Welborne
Labs - Ron Welborne
- Wilson
Benesch - Brian Tucker
- Wisdom
Audio - Tom Bohlender
- World
Audio Design - Ric Berta
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