Interestingly, back in the 70's, a friend of mine who was an electrician was involved in rewiring an old cinema, which was been converted to another use. The original PA system was been thrown out, so he said I could have it if I collected it - so I did.
The amplifier was a six foot high rack system with one
LARGE knob on the front, labelled 'Volume'

Checking the valves in it, it was only rated around 5W output.
It was no use to me, so I gave it to someone else - I've no idea who it was now? - so no idea what became of it.
However, the speakers consisted of two BTH 18 inch field coil speakers, and a single pressure unit and wooden horn for the treble - a beautifully made latticed horn, some skill involved in making accurate joints on the curve of a horn.
Around this time we were involved in setting up a small music club, following on from a mobile disco we're run for some time.
We'd no idea what the spec. on the speakers was, but we made two boxes for the bass units, used a transformer we happened to have to power them, and used them for the PA fed from a TUAC 125W amplifier module.
Despite originally only been fed 5W, they performed quite happily with 125W, and sounded pretty damn good
The speakers were still there when the club finished, no idea what happened to them
