Class A tube headphone amplifier with external mains transformer. Specifications: Output power: Typically 1Watt. Input impedance: 47K Ohms. THD: < 0.015% 20Hz to 20kHz unweighted < 0.005% 20Hz to 20kHz "A" weighted. S/N ratio: > 96dB unweighted ref. full output > 108dB "A" weighted ref. full output. Frequency response: 30Hz to 75kHz < ± 1.0dB. Power requirement: 12 - 0 - 12Volts AC 500mA (via mains adaptor supplied). Remark: Some signs of cosmetic wear. |