Amplifier Power tubes - important to sound?

i replaced all the small tubes on my mono amplifiers and now I'm left with replacing the stock Power tubes, kt88.

I like what I hear with 12 new small tubes - telefunken nos 12ax7 and 12at7.

Now I am left with replacing 16 kt88 stock JJ tubes. will Probably use Siemens 6550 nos.

How much will this impact what I hear do you think? I recall hearing that power tubes don't make that much of a difference.

emergingsoul08-12-2024 9:19pm

dougthebiker Details Discussions Posts This discussion Message User 222 posts 08-13-2024 at 03:36pm Copy Comment URL Report Comment Edit Delete Regarding the small tubes, I have an integrated 300B (Elekit with the new Western Electrics) and recently replaced a 5751 (superior substitute for the 12AX7 IMHO) with a Cryotone 5751, the brand which DecWare offers as an upgrade. I also added a pair Cryotone 12AU7s. After playing it for a couple of days of break-in, I noticed I was losing interest in listening to music. It sounded fine but the emotional engagement was missing. On a fluke, I switched my previous NOS Sylvania 5751 back in (did not switch the 12AU7s) and Voila! I couldn't stop listening to my rig! The emotion, dynamics and tonal accuracy were back! I had no idea what a seemingly insignificant tube could do.