"it's a misconception that tube amps sound muchmuchmuchmuchmuchmuchmuch better cranked.
sure they do sound significantly better cranked, but at bedroom volumes, they're not as horrible as some people make them out to be."
So is it a misconception or not?
I think it depends on the design of the amp. Some amps, no matter how hard u crank it, it still STAYS clean with almost no break up, like my old bassman 135. My previous vox ac30cc, i didnt like the sound of the cranked with preamp high.
My jcm800 sounds realli crap to me without the master vol gg up past 4, and if i use just preamp to get a dirt sound gg with master vol low, it sound realli bad n frizzy n thin. I guess earlier marshall like the plexi jtm jmp and earli jcm800 was build with the idea in mind that they can crank them with more headroom, so that the guitar heros then could play it in bigger venues, and it wasnt alot of gain in earlier stuff like led zep cream deep purple...etc(Those guys go to jim marshall n request for amps to be build that way, n remember last time the technolgy not like now, they were just at the start of the overdrive/distortion era). Its basically just driving the tubes n speakers to overdrive, like how earphones r abused. For this think of acdc, not much of gain going but it sounds huge.
Then thats where we come to ppl who wanted more gain in their marshall, like evh who wld mod their marshall with extra gain stage. thats how the 5150 came abt i think...
But my newer marshall vintage modern realli surprised me by sounding realli sweet at low low volumes in comparison to the jcm800.
But generally, turn up the master to a level where the tone suddenly comes alive or breathes(the tubes r hot enuf here), no need crank until full lah.
So it depends on the how n wat the amp was designed for, cuz rem ah tubes r just a component, still need to see the circuit design gd or not. n wat u after, preamp gain or power tube saturation
talk too much alr