 M.B. |
 M.B.L.E |
 M.C. |
 M.D. Radio |
 M.L.T. |
 M3emthree |
 Mabel Radio |
 Mabille |
 Mac Audio |
 Mackie |
 Maco |
 MAD |
 Madeleine-Radio |
 Madisan |
 Madison |
 Madison |
 Madrid Radio |
 Magestic |
 Magicbox |
 Magister |
 Magivox |
 Magnadyne |
 Magnavox |
 Magnavox |
 Magnecolor |
 Magnétic France |
 Magnetofoni Castelli |
 Magnétone, SAMAS / Dictone |
 Magnum |
 Mairal |
 Majestic |
 Majestic |
 Majestic |
 Majestic (SG) |
 Majestic-Radio |
 Malony |
 Malony |
 Manora |
 Manufacture Française de Radiophonie |
 Manufrance |
 Manufrance |
 Marahis |
 Marahis |
 Marantz |
 Marato |
 Marbon Radio |
 Marc |
 Marconi |
 Marconi |
 Marconi |
 Marconi (CA) |
 Marconi (GB) |
 Marconi Española |
 Marconi Instruments |
 Marconi Instruments |
 Marconi Instruments |
 Marconiphone (BE) |
 Marconiphone (SE) |
 Marconiphone (SE) |
 Marignan |
 Marius Thouvais |
 Markofon |
 Marksman |
 Marlux |
 Marquant |
 Marquett |
 Marquett |
 Marsa |
 Marsa |
 Martial |
 Martial |
 Martial Le Franc |
 Martial Le Franc |
 Martial Le Franc |
 Martin-Gautié |
 Marval |
 Marvel (JP) |
 Masbel |
 Mashpriborintorg |
 Mashpriborintorg |
 Mason |
 Mastech |
 Mastech |
 Masteradio |
 Matador |
 Matelco |
 MateStar |
 Matsui |
 Maximal |
 Maxxon |
 Maymo |
 Mazda (anc. Métal) |
 Mc Martin |
 McIntosh |
 McMichael |
 Méca Radio |
 Mecanix |
 Mécanotest |
 MECI |
 Meck |
 Medalyr |
 Medalyr |
 Médiator |
 Médiator |
 Médiator |
 Medion |
 Megabell |
 Megasound |
 Megger |
 Mego |
 Meissner |
 Meisterfunk |
 Mélior |
 Melochorde |
 Mélodia |
 Mélodial |
 Mélodial |
 Mélodial |
 Mélodium |
 Mélodyne |
 Mélovox |
 Memorex |
 Mende |
 Mendola |
 Merlaud |
 Merlaud |
 Merlaud et Poitrat |
 Mervyn |
 Mesko |
 Mestre et Blatgé |
 Metrix |
 Metronic |
 Metrosound |
 Metrovox |
 Metz |
 Metz |
 Meyer |
 MFJ Enterprises. Inc. |
 Miami Radio |
 Mic's Radio |
 Micafil |
 Michel |
 Micodio |
 Micoletta |
 Micromaxx |
 Micronta |
 Microvox |
 Microvox |
 Midland |
 Mignon |
 Mikrofona |
 Mikson |
 Mildé |
 Mildé-Bayard |
 Milway |
 Mina - radio |
 Mina - radio |
 Minerva (A) |
 Minerva (A) |
 Minerva (A) |
 Minerva (A) |
 Minerva (A) |
 Minerva (A) |
 Minerva (USA) |
 Minerva (USA) |
 Minix |
 Minsk Radio Works |
 Minué |
 Minus |
 Mira |
 Miracle |
 Miracle |
 Miracle |
 Miroma radio |
 Mistral |
 Mitsubishi |
 Mivar |
 Mix-Ter |
 Modern Radio |
 Moderne |
 Monacor |
 Monarch |
 Monarch (USA) |
 Monavox |
 Monax |
 Mondial-Paris |
 Mondial-Paris |
 Mondiavox |
 Mondivox |
 Monjoly |
 Monjoly |
 Monopole |
 Monopole |
 Monopole Instrument |
 Montarbo |
 Montona |
 Moon |
 Moreau |
 Moriss |
 Moriss |
 Morisson |
 Morrisson |
 Moscow Industrial Union `TEMP` SU |
 Moskovsky Priborostroitelny |
 Motoradio |
 Motorola |
 Motorola |
 MP |
 MTlogic |
 Mullard (F) |
 Mullard (GB) |
 Multimetrix |
 Multimetrix |
 Multimoteur |
 Mundial Radio |
 Murphy |
 Muse |
 Musicalpha |
 Musicalsound |
 Musicavox |
 Musiclair |
 Musicorder |
 Musivox |
 Mustel |
 Mustel |
 Mustool |
 Mylfrosi |
 Myrella |
 Myrra |