The SPMC200 is a versatile Passive Monitor Volume Controller in a compact desktop format. It is designed to allow precise adjustment of monitoring levels from analog audio sound. It passively attenuates stereo signal from a computer audio interface, CD player, pre-amps and mixers. The unique passive circuit design for a high quality signal path, and it features combo XLR/TRS and TRS, as well as 3.5mm jack, mute switch, MONO toggle and rotary volume control.