Lowther B.5
The B.5 is a single-ended amplifier which uses a single PX25 to produce 5 watts of power. It was designed primarily as a gramophone amplifier, but Lowther also stated that its output was sufficient to fill a thousand-seat hall when coupled to a Voigt unit and 4 ft. horn.
Valve line-up: 1 X PX25, 1 X MHL4, 1 X IW4
Power output: 5 watts
Size: 7.5 X 11 X 10.25 inches
Original price: £15-15s-0d