Mains powered (IEC) monobloc vacuum tube amplifier 40wRMS, gold-plated RCA inputs, 8ohm and 4ohm loudspeaker taps. Uses 2 x KT-88, 2 x 6SH7, 1 x 5U4G Quad II-forty Monobloc Power Amplifier Specifications Valve complement 2 x KT-88 2 x 6SH7 1 x 5U4G Total Harmonic Distortion at 700 Hz 0.3% at 40W 0.03% at 1W Frequency Response 10Hz to 30kHz (+0 / -0.5dB) Damping Factor 20 at 700Hz (8 ohm) Hum and Noise better than -80dB Loudspeaker taps 4 ohm and 8 ohm Sensitivity 1 V RMS Power Consumption 180W maximum