Integrated Stereo Amplifier Alpha 3

A stereo hi-fi integrated amplifier with output power of 40 watts per channel into 8 ohms. Bass and Treble tone controls with Direct tone bypass switch, Tape Monitor switch. RCA input sockets for Video, Tuner,  CD and Phono (MM cartridge), RCA input/output sockets for tape recorder. 4mm switched and direct sockets for 2 pairs of loudspeakers and a jack for headphones.

Specification
(Noise and sensitivities ref. 40W into 8 ohms at 1kHz.)
Output Power (typical)  
Both channels driven into 8 ohms:   40W (20Hz-20kHz at 0.5% THD)
Single channel driven at lkHz into 8 ohms: 50W typ. Into 4 ohm 80W typ.
Harmonic distortion: at 30W, 8 ohms at 1kHz 0.02% typ.
Frequency Response
Phono Input:    typ ±0.5dB 60Hz-20kHz,-3dB at 20Hz
Other Inputs:   typ ±0.5dB 10Hz-20kHz
Inputs
Phono (suitable for MM and 'high-output' MC cartridges
Sensitivity:          2.2mV, impedance 47k ohm/100pF
S/N ratio CCIR:   75dB
CD, tuner, tape and video
Sensitivity:         170mV
S/N ratio CCIR:   95dB
Input impedance: 20k ohms
Outputs
Tape output
Nominal output level: 150mV, impedance 2k ohm
Headphones
Maximum output level into 600 ohms: 10V rms
Output impedance: 330 ohms.
Suitable for headphones of 8 ohm to 2k ohm impedance.
Loudspeakers
Nominal output level 40W per channel. Suitable for speakers of 4 ohm or higher nominal impedance.

Power supply
240V nominal 230VA, may be dealer adjusted to 220V and 120V nominal.
(100V model to special order)

In questo link sono elencati 22 modelli, di cui 22 con immagini e 2 con schemi.
Elenco delle radio e altri apparecchi della A&R Cambridge Ltd. (ARCAM); Waterbeach, Cambridge