Many tubes, many
capacitors and many (bad working) switches in the signal path and all this
on a printed circuit board..... The best way to build a bad sounding amp!
And then: set into nearly closed box, so that everything gets too hot.
I never found out who
built this amp. And I do not want to know! The PCBs and the printing look
like Telefunken, but most of the other parts do not. Sennheiser? PE?
The EL504 is not
responsable for the bad sound coming out of this amp - a Telewatt VS71 also
uses them and sounds
good. Later Telefunken
made a version with split core output transfomers - with no sound
Less would have been