A discontinued digital effects processor from Lexicon, designed for professional audio applications. The M300 delivered high-quality digital reverberation effects, continuing Lexicon's tradition of innovative audio processing. Featuring MIDI implementation for external control, the unit was suitable for studio recording and live sound reinforcement applications. As with other Lexicon products of its era, the M300 was engineered to provide natural-sounding reverberation with precise parameter control. This model has been discontinued and is no longer manufactured or supported by Lexicon.