Quad - II Tube mono block power amplifier - Multiple models

Pair of two Quad II valve amplifiers from 1958. They are operational, refurbished and completely original in perfect condition with new valves with barely 10 hours of use. They feature a custom-made power supply built by a specialists technician.

Type: 2 valve power amplifiers
Output power (RMS): 15 W across the full range from 20 Hz to 20 kHz
Frequency response: Within 0.2 dB from 20 Hz to 20 kHz
Within 0.5 dB from 10 Hz to 50 kHz
Distortion: (measured at 12 W output): Total harmonic distortion of the third harmonic and above at 700 Hz
Only higher-order harmonics: at 700 Hz
Total harmonic distortion (THD): at 50 Hz not exceeding 0.25%
Input sensitivity: 1.4 V rms for 15 W output
Load impedance: 1.5 MΩ in parallel with 10 pF
Noise floor: 80 dB below the 15 W reference
Output impedances: 15 Ω and 7 Ω
Effective output resistance: 1.5 Ω for the 15 Ω output setting
Power supplies (input): 200-250 V AC single-phase at 40–80 Hz
Power consumption: 90 W excluding control unit and tuners, etc.
Weight: 8.3 kg each
Dimensions (L x W x H): 165 mm x 330 mm x 120 mm
Year of manufacture: 1958 / 1970
Made in England

PERFECT IN BOTH TECHNICAL AND AESTHETIC ASPECTS.