The M-PATCH 2 provides monitoring of up to two stereo input sources via two stereo outputs and offers excellent performance using passive circuitry. Front panel features include a large main volume attenuation control, an Aux level control and a STEREO/AUX input selector switch. Versitile monitoring controls include an A & B output destination selector; a Stereo/Mono summing switch and a Mute switch. A built-in headphone amp with a dedicated volume control and a 1/4-inch (6 mm) front panel headphone jack allows monitoring via headphones. Connection to a broad range of sources is facilitated by rear panel stereo XLR/TRS inputs, stereo unbalanced RCA inputs and two sets of balanced XLR outputs. Metal enclosure with included Rack-Mount Adaptors .