Quad - II Tube mono block power amplifier - Multiple models

Pair of 2 valve amplifiers Quad II from 1958. They are functioning, refurbished and completely original in perfect condition with new tubes with only 10 hours of operation. They feature a power supply specially made ad hoc by a specialized technician.

Type : 2 valve power amplifiers
Output power (RMS) : 15 W across the full bandwidth 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 of the third harmonic and higher
at 700 Hz
Only high-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 : 15Ω and 7Ω
Effective output resistance : 1.5 Ω for a 15 Ω output setting
Power supplies (inlet) : 200-250 V AC single-phase 40~80 Hz
Power consumption : 90 W excluding control unit and tuners, etc.
Weight : 8.3 Kg each
Dimensions (L x P 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.