no that's what people like to say. people who never spent half a decade. a decade. a decade and a half voicing an amp. truth is they spent that long tweaking and playing to distill the recipe, but the only way to get the actual sound is with tubes within a certain spec, same as the design. the whole thing with mesa tubes is, yeah they're rebranded, but any tube with the mesa stamp has been tested and sorted to be exactly within spec of circuit design. so with mesa tubes you get, the sound. with JJs, you get, a sound. if you get off on boogie recipe you can tell right away if it's off spec, or there's groove tubes in the preamp of a dual rec. it sounds fucked up to me until I put all mesa tubes back in it, then bam. tone town.