Lowering Tube power amp output

Drop in some Kt-77's  There cheap now also

I’ve heard you can start removing push-pull pairs on each side (normally 3 push-pull pairs per side), but as noted this will be suboptimal. You’ll have to re-bias if you do this. You can also just drop the tube biases down from the standard 40mA to say 35mA, for a slight reduction in heat. Rogue is great to chat with if you want their guidance on this. 

If you’re concerned about heat dissipation, an amp with a dozen KT88 and 6 small tubes is not a great match. As others have suggested, it’s probably a good idea to trade the amp in. Many audiophiles without heat concerns would love to have that amp!

Electric cost your concern for ac? 

It is frequently over 90 degrees outside… my partner is disabled and uncomfortable so I keep the house at 70 degrees. Even so, my electric bill (with 100 hours of 36 tubes… 8 KT150s running) is less than my Verizon bill, insurance bill, property tax bill, Comcast bill… How is this an issue? Too much bass?

It is frequently over 90 degrees outside… my partner is disabled and uncomfortable so I keep the house at 70 degrees. Even so, my electric bill (with 100 hours of 36 tubes… 8 KT150s running) is less than my Verizon bill, insurance bill, property tax bill, Comcast bill… How is this an issue? Too much bass?

I don't get it either. No problem running tube amps during summer here in GA, even with my AC slightly underpowered. Electricity cost is not really a concern on a $10K tube amp?

Just run the tube amp when you're listening, and turn it off when done. I've yet to experience any tube component that doesn't sound great after just a couple minutes warm up. By contrast, some of those solid state components need to be kept on for hours before they get into a good place.