I agree, change for a new set and tech check up is already planed. As said, this quad wasn t worn out and were the orginal set that came with my ad mk3, so it s hopfully balanced. It works well with the mk1 and give the same result than the former tubes may be a bit better . so i think it has to do ...

i went for a try, i had to know
i swapped the quad for 6550 and changed the preamp tubes.
same result.
What surprises me is that i have to set the master to 3/4 to get a decent volume level when, with the mk3 at the third it's really already very loud.

thanks,

i still have the original set of 6550 i had in the mk3, do you think i can give it a quick try without risk ?

hi all, I have been searching the web but didn't find any proper answer to my question. I baught my Mk3 around 2004/5 (love it) and got a mk1 today. I just tried the mk1 and got very surprised by the very different voicing but also by this impression of lack of power. I was so surprised that i used ...