Originally posted by heybulldog
the good news is that i love marshalls with either tube set!
Is there a noticable difference in the sound of the amp between these two power tubes?
What is that difference?
Does either make the amp more valuable on today's market?
Thanks for the advise.
I'm having the same dilemma. I picked up this Marshall 50W JMP MKII 78' all original except for the cabinet which was redone by Mojotone. The amp lacks bottom end. The treble is excessive IMO. I have the bass cranked and the presence and treble all the way down. Is this characteristic of the 6550 tubes in it? Or would converting to EL34 alleviate this? New speakers? Help!