Headphone amplifier, 6 channels with separate bass and treble controls, front and rear panel output jacks, balanced XLR and 1/4 inputs, operates in stereo, mono (left source), mono (right source), and mono ( left and right sources), auxiliary front mounted on separate input source, 8-segment LED level indicators on all channels and buses, maximum input level: +21.5 dBu, input impedance: 40 kilo-ohms balanced, level Max Output: 500 mW into 32 ohms, Max Gain: 25.6 dB (tone controls flat), Frequency Response: 20 Hz – 50 KHz +0, -2 dB, CMMR: 40 dB, Dimensions: 44.5 x 482 x 190mm, weight: 3.1kg.