A 1970s Sugden SQ4 quadraphonic system!

[Tony L]

Here’s something I never realised even existed, a Sugden Q51 decoder!

The rest of the system is up too, a C51 preamp and 2xP51 power amps (one here).

 

[Budney]

cool set up! Not heard much about the P51, how is it different to the A51?
Tempted by the one thats still online, but probably shouldn't as I just picked up a pretty minty A21 mk2
Decoder is definitely an oddball, hearing a quad Sugden set up would have been pretty special, I wonder what speakers they were driving

 

[Tony L]

The P51 was a class AB amp, I guess closely related to the A48. I’ve never heard one, but I’d expect it to be good. JES knew what he was doing.