I'm selling this because I haven't used it, although I bought it a few years ago. It's unused and brand new. https://www.electroharmonix.co.jp/art/mx225.html This is a mixer with two stereo inputs and five stereo outputs. Each zone has volume controls for inputs 1 & 2, a stereo/mono switch, and an LED level meter. By connecting it to an amplifier or powered speakers, you can centrally control the volume with the MX225. All connections are balanced XLR. It has a built-in power supply and is a 19-inch rack size. Installation and operation are easy. ART MX225 Front Panel Controls * There are two balanced inputs, which can accept both stereo and mono signals. * The two input sources are sent to all five zone channels. * Level adjustment is possible for the two input sources on each of the five zone channels. * The MONO switch allows for stereo or mono settings for each zone. * The MONO LED lights up when set to mono. * All zone channels are equipped with LED level meters (-25, -20, -15, -10, Clip). * The SOURCE INDICATOR LED allows you to check if signals from sources 1 and 2 are passing through. Input Terminals: XLR Female Balanced (x4) Output Terminals: XLR Male Balanced (x10) Input Impedance: 47k Ohms Output Impedance: 200 Ohms Maximum Input Level: +20dBu balanced Maximum Output Level: +24dBu balanced Maximum Gain: +6dB S/N Ratio: >90dB typical THD: <0.05% Typical Frequency Response: 20Hz〜100kHz (@ 80Hz the output drops 3dB, @ 100kHz drops about 5dB) Power Supply: 100VAC / 50-60Hz, 15 Watts typical Dimensions: 44 x 483 x 184mm Weight: 2.42kg