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Gotcha. The full setup seems to only have one mains cable, going to the preamp, and then two cables come off that, one to each power amp (although this one is mono). Here's a stereo one: https://www.ebay.co.uk/itm/285084893694?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&customid=CjwKCAiA76-dBhByEiwAA0_s9aLOqj0JCQXLPXXZYYY81MrLfb3rMJImErmbjtmNFulLLrJC25yLyhoCzo4QAvD_BwE
Would be a waste to stream Spotify through something that lovely, but it's still very tempting.
Sparky-
Waste?
Back in the 90s, I had a pair of Quad IIs that were cabled directly from a 1st gen Harmon Kardon CD player, where the headphone socket’s volume control also changed the output on the phonos. All wrong, but it sounded great : ) -
Would be a waste to stream Spotify through
Amp is a stereo BBC AM8/2 class A valve amp, similar to the Mullard 3-3. Preamp is a stereo Mullard 2-valve with a few tweaks. 4 inputs:
1: Aux connected to cheap Chinese bluetooth module. Used sometimes.
2: TV, mostly streaming YouTube through a Chromecast. Used the most.
3: Cambridge Audio DVD player. Used sometimes.
4: RIAA phono stage built with unused vintage components found in an abandoned electronics stash from the 60s and 70s. Took ages to plan-in and build. Never used.Judge me!
vilms5000
Jonny69
Power supply is onboard on those. Under the two big covers are the power supply and output transformers, the small cover is a smoothing choke or capacitor (or both). Rectifier valve is at the back. The two small valves are the amplification stage and phase splitter for the push-pull. The two big valves are the push-pull output stage. This is just off memory but the voltages are something like 5V for the rectifier heater, 6.3V for the other heaters and the HT is about 450V. It may have a bias tap on the transformer but there’s no 12V line. That’s why I think it might be a solid state preamp / tone control because that would run on low voltage like that.