The M 52 is a small, lightweight, portable control monitor featuring a 3" driver and built-in amplifier capable of producing over 100dB. It can be AC powered (85–230V) or DC-powered by a 12–20V battery. The M 52 D is identical to the M 52, but adds S/PDIF and AES/EBU digital inputs that synchronize with any signal between 32kHz and 48kHz at 24-bit resolution.