I have a late 60's YSR-1 that I don't know what to think of. I have a few other Traynors as well (YRM, YGL and YGM)--They're all different sounds, but they all have a clarity and punch that's lacking in the YSR. My YSR is loud. Kind of brittle when clean then a bit fizzy and mushy once driven. Also, it breaks up very quickly. I was hoping it would be a bit more like a YRM but with tube bias trem. Or a louder YGM. Well I took it to my small town tech, and after 5 weeks he said he couldn't find any issue--claimed everything was measuring to spec, and he didn't charge me. So I'm wondering--is this just how these amps sound or do I need to find a new tech? Does anyone have experience with a YSR-1 and a YRM to compare? They're both rated at about the same power, but my YRM just blows away the sickly sounding YSR.