I went back and forth experimenting with tubes in a little Japanese 300b integrated amp in this case the small 12v tubes definitely made a bigger sonic impact on the sound. There was a very big gain in the bass region
Signal tube versus power tube, sound impact?
My mono block has eight KT 88 tubes(power tubes) and six smaller signal tubes. I'm using the stock tubes that came with each Mono. I think they are JJ tubes.
Rather than replace them all would it be best to change out the signal or the power tubes? Not sure how good the JJ tubes are but I hear they may not be the greatest.