Hello,
I am new to this forum, and signed up because there seems to be more information about this amp here than the rest of the web combined. Kudos.
I'm hoping that SteveD will chime in on this one, as it is a technical question regarding the design of the amp.
My question is, what is the primary impedance of the output transformer, and is it dependent on speaker load? If possible could I have a spec sheet for the transformer? I realise these questions will probably get a sharp "no" but I have a couple of 8ohm speakers that I would like to try with this amp. If the primary impedance is dependent on speaker load (like most Hammond types) then plugging an 8ohm speaker into the 16ohm jack will double the primary impedance attached to the output tube, resulting in a much less dark and more open sound.
Also, are the 4 clipping diodes arranged as shunts to ground or in parallel to the circuit? Marshall's customer service department refused to provide me with a schematic and I have no time to reverse engineer the circuit, but I plan on removing these as soon as possible.
Many Thanks,
James