m

         
 

Mactone
Madrigal
Magenta
Magnat
Magnepan
Magnum Dynalab
Magico
Malvalve
Manger
Man Boon 
Manley Labs
Marantz
Marchand Electronics 
Margules Audio
Marigo Audio Lab
Marker Audio
Mark Levinson
Marsh Sound Design
Marten
Martinelli Sound
Martin Logan
Master Loudspeakers
Master Source
M Audio
Maxell
Mauritz
MB2A
MB Quart
MBL
Mc Intosh
MC-Systems
ME Geithain
ME Sound
Meitner
Mel Audio
Meloda L
Meridian
Merlin Cables
Merlin Music Systems
Merrill-Scilla Research
Metronome Technologie
Metrum-Acoustics
Metropolis

 

 

 

 

Metz
MFA (Music First Audio)
MG-Hifi
Micromega
Michell Engineering
Miller & Kreisel Sound
Mill Hill Audio
Milty
Mimetism Audio
MiniWatt
Mirage
Mission
MIT
Mitchell Electronics
Mitra
Mitsubishi
Mivoc
MGL Audio Laboratories
Modwright Instruments
Moerch
Monarchy Audio
Monitor Audio
Monolithic Sound
Mono Pulse
Monrio
Monster Cable
Montegiro
Moon
Monolite Design & Technology
Mordaunt-Short
Morel
Morrison Audio
Moth Audio Corporation
Motorola
MSB Technology
Murata
Museatex
Music Culture
Music Reference 
Musical Fidelity
Myryad
Mythos Audio