So I recently picked up a peavey triumph 120 which is a 120 watt all tube head. I know that may not be this forum's favorite piece of gear, but I love old peavey stuff and I think this thing sounds awesome. I play pretty loud and I've gotten kind of used to how loud I like to play and this amp seems far too quiet for 120 watts. I've heard old tubes can make an amp quieter/have less headroom, so I changed out all four power tubes and the amp still seemed quieter than it should be. All tubes light up fine and look healthy. I finally busted out my SPL meter and measured the volume of the triumph while it was pretty much dimed. I got a reading of about 116 db. I then decided to compare it to my other guitarists peavey classic 100(100 watts tube) and I effortlessly got a reading of over 120 db with this amp just about half way on the master volume. I also decided to measure it versus my peavey stereo chorus 400(130 watts solid state) and I got a reading of over 120 db with the volume just over halfway with that head too. I guess I'm just kind of baffled because all my peavey stuff is usually so loud. My 5150 was incredibly loud and even the valveking I owned for a while was plenty loud. I'm just wondering if anyone on here could give me any info on what might be wrong or if this amp is just a quiet 120 watt head. Any help would be greatly appreciated! Thanks in advance!