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Doubling the power output of an amp only gives a slight increase in loudness. The main difference is an increase in clean headroom. You have to increase the power by a factor of 10 to get a doubling in volume level. So the KT66 option is perfect for those who want more traditional Hiwatt style clean tones, while the 6V6s are great for those folks who want somewhat earlier breakup.

I understand where you're coming from Brent. My 2204 is much the same. However, I must throw a caveat in there. My 2204 isn't quite a stock 2204, as we're discussed previously. I've got a number of "plexi" touches in there, primarily around the presence circuit & tone stack. I've also removed 2 of the three "treble peaking" circuits (bypassed the cap/resistor network going to the pre-amp pot & the snipped the bright cap on the master pot). And I'm running 50w Plexi iron from Heyboer (their Drake clones). Not sure how much difference there is between those transformers & the JCM800 50w iron, but I can say that with the master dimed it sags/compresses quite a bit. At that point the gain does tend to just roll on more mush as you crank it up.

I also boosted the first gain stage a bit but I'm considering backing that mod out or scaling it back. I never run the gain past about 1:00 anyway and it adds more noise than I'd like. There are other places in the circuit to boost gain and I may try those. The trick with the 2204 is to find a happy gain balance because with the amp's voicing things can get out of control in a hurry.

But, in any case, it's frightfully loud.

I am getting old & and they are all to loud!

I saw my old guitar treacher, play at Toads in New Haven Yesterday, with the group "Holding Pattern". He was using a JCM 900 4100. Toads is a decent sized place, and the 100 Watt Marshall with one 4 X 12 cab. was way to loud.

What is why, I will stay with 6V6s in the Triwatt, & I am pretty sure my next build will be a Trinity 18 Plexi, unless Trinity starts making 6V6 JTM45s.

What if I want both?!? Do I have to get 2 Triwatts!!!!!

I like loud amps... actually I LOVE loud amps.

Just get yourself a screw driver, a multimeter and a pair of oven gloves. Seriously. Then you can swap between the 6V6s and KT66s whenevr you want

Well, with all due respect Rob, it's not like the Triwatt with 6V6's ISN'T loud!!!! LOL!

Mine is completely stock. Something that is unusual for me is that I actually really liked the tone with the gain dimed and the MV down low... completely opposite to how I usually run an amp!!

I like loud amps... actually I LOVE loud amps.

I tend not to max out my amps. I will run the controls all between 10:00 to 2:00 O'Clock Settings. (Unless it's nighttime, then the Master is at 9:00)

I like Power Tube Compression more than Distortion.