Features  Four pairs of 7591A EH output tubes operate in Class AB1 design. 70 watts per channel. 140 watts-two channels. Minimal negative feedback with precision. RC circuitry for more linear performance. Extended frequency range C-core audio output transformers. 8 power tubes are individually biased. Remote volume control.  All-aluminum chassis. Chassis finish: black or silver.   Specifications Vacuum tubes: 7591A EHx 8,12AU7 x 4. Output power: 70w x 2 channels.  Input sensitivity: 720mv. Input impedance: 100kΩ. Harmonic distortion: <0.05%.  Frequency response: 10HZ - 110KHZ -1dB. S/N ratio: 93dB.  Input: 4 sets. Speaker output impedance: 4 or 8 ohms.  Power consumption: 220 watts. Dimensions: 43L x 33W x 21.2H (cm).  Operating Voltage: 100-120VAC. 50Hz/60Hz (220-240VAC 50Hz/60Hz).  Weight: 27.5kg.         Specifications subject to change without notice.