MARCAS a b c d e f g k m n p r s t u a Ableton Adam Audio AKAI Allen & Heath Apogee Arturia Audio Technica b Behringer Beyerdynamic c Celestion d Denon e Electro voice Elektron Empress Effects f Focal Focusrite g Genelec k Korg m M-Audio Make Noise Moog Motu n Native Instruments Neumann Novation Numark p Pioneer r Rode Roland s Sennheiser Sequential Solid State Logic STS Touring Series t Teenage Engineering u Universal Audio