This amp is such a pleasure to play. I have left tubes stock. I have not had the desire yet to change anything. The clean channel is what I always thought a clean channel on an amp should be. It is very clean and the eq is very sensitive. The bright switch is a nice addition. The gain channel is superlative. This amp can do classic rock to the heaviest modern metal there is. Again having the bright switch gives it a nice touch. Being able to switch the amp to 25 watts gives yet another useful option. That lower ootion allows for the amp to be even more of a bedroom amp if you need that. Even at full power on low master volume the amps tone delivers. Overall this amp is more versatile than I first thought. Jazz cleans to over the top metal destruction is in it’s DNA. This amp is now part of my studio set up. Great job at PRS designing this amp. It fits in nicely with my JVM and JCM 800 ‘s very nicely.