H&H Monoblocks

Ex-BBC monoblock amplifiers fully serviced. Specifically made for the BBC LS3/5A loudspeaker design.

Specifications:

Output power: 30w / 15 ohm. 45w / 8 ohm. 75w / 4 ohm
THD: < 0.1% (25w / 8 ohms) Input Impedance: 10k ohms (balanced) Input sensitivity: 0-25v RMS for full output into 15 ohms Noise: -60dB (20hz-20khz) S/N ratio: 80dB RMS (Relative 25 watt into 15 ohms) Damping factor: >100 ref 7.5 ohms load at 100hz
Slew rate: 5v / uS
Protection: proof against short and open circuit
Mains input: 240, 230, 220, 210, 115 a.c. 50 / 60 Hz
Mains input connector: Neutrik / cannon l.n.e.
Transformer balanced input
Signal input connectors: P.O. Bantam Jack / Painton 310035 multicon 4 way (balanced)
darlington output stage
Loudspeaker o/p connector: Painton 1S9F 11 pole socket
Ambient temperature: up to 50 C without forced ventilation
Dimensions: 247mm x 155mm x 89mm.
Weight: 4.1 kgs per amplifier. (Unpacked)