Lowther PM1A
The PM1A was Lowther's first commercially-produced drive unit. It incorporates Voigt's light coil twin diaphragm.
Flux density: 19,000 gauss
Impedance: 15ohms
Power handling: 6 watts
Weight: 9Kg
Size: 8.5 X 7.5 X 7.5 inches
Price: £32-0s-0d