ART Promix, Compact 3-Channel Mixer, The Promix mix 3 microphone signals (XLR) to 1 mono signal, Maximum Gain + 60 dB, Input impedance 600 Ohm, Maximum input level -14 dB, Maximum output level +14 dB, Output impedance 600 Ohm, Total harmonic distortion > 0.02%, With headphone port, 12 V Phantom power, Dimensions: 143 x 92 x 45 mm, Weight: 680 g, Including 12V DC power adapter