Hi guys,
I have a problem:
When I inject pure tones in my ST70 with the speakers replaced with 8 ohm power resistors, I can clearly hear the tones ¨transduced¨by some part of the amplifier. I tried grabbing all possible ¨transducers¨ (transformer bells, tubes, metal sheets) but the sound keeps coming. I can also clearly listen to music (not only tones). Both channels independently and/or together.
Any hint?
Thanks!
--Rodrigo