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Ok so I swapped out V1 through V4 with EH 12AX7. They really took the hiss out and quieted the amp down some. I havent found a 12AT7 to replace in V5. Also swapped the EL84 to Groove tubes (hey they were cheapo @$19 bucks) It brought back a little more gain. On the rhythm channel (clean)...

Studio 22+ 4 12AX7 + 1 12AX7 (for reverb) =5 total I spoke with chris at Boogie and DL'd the manual. Im not hi-gain player, would replacing a 12au7 in V1 smooth out the amp?

While were at it, what about a replacement speaker?

So looking at the back of the amp V1/V2 are lead mode and V3/V4 are rhythm and V5 is reverb, right? (help me here) So I need two matched sets? Correct? Could I replace V1 with a 12au7 to control the gain and mellow out the amp?

Ive had this since '86 as a practice amp. Its begining to have more hiss. I think it may be time to retube the whole amp (5) 12ax7's and 2 EL84. I think...can anyone give suggestions on which tubes I should replace with? Thanks