Check the listing for details. Numark Studio Audio Master Control Center DM-550. Color: Black, Condition: Used. Listed at 125.00 USD. The Numark Studio Audio Master Control Center DM-550 is a tabletop DJ mixer designed for DJs. With a maximum sampling rate of 24 bit (44.1 kHz), this analog unit offers high-quality sound reproduction. Featuring input/output ports for analog RCA/coaxial out, this sleek black device allows for easy connection to various audio sources. Perfect for DJs looking for a reliable and versatile mixer to enhance their performances, the Numark DM-550 delivers top-notch sound control and flexibility.