Sadly enough, the guarantees of all the quality ingredients needed to replicate the sound & feel of a stack can't be counted on unless you are playing at a professional level & have contacts (riders) that stipulate such. I don't get gigs like that & must always count on myself to know the venue & bring my own sound, meaning, the right amplifier for the job. I would love to play / use the 1 watt Marshall I have (JMP1 & JVM1) but most PA systems I come in contact with just can't bring the tone to the level of quality that a stack bring to the immediate playing stage. Things usually sound airy (like they're miced!) and the frequencies are different in a way EQ-ing can't correct or compensate for. It not only takes money but knowledge & skill to get a little amp to satisfactorily replace a stack. I havent been fortunate enough to play gigs with the capable & knowledgeable tech that knows how to adequately do that & has the proper equipment to do that. Till that day comes I will continue to count on myself to sound right. Truth be told, I have a great sounding 6V6 powered Supersonic that does a great Marshall impersonation that I bring to jobs that can't handle a stack. But thats not really what this is about right?? It's about the stack being needed or being replaced or outdated. I don't ever see that happening as long as playing guitar stays cool & rocking out remains fun. Nothing beats what having a stack at your back feels like or sounds like in the room. Small amps n PA's only imitate, some way better than others. Sonically, it's just tough to replace the simplicity of rolling them 4x12's in the room, plugging in your head and having the perfect sound, presence & feel that a stack loving Marshall toting aficionado is after. By the way, How much PA, quality mic & amp does it take & who's bringing it to 'every' gig? That's an important & multi leveled question that opens up other avenues of thought & discussion as well. Not ever job comes with adequate gear for this & I know I'm not buying it all so I can cart it & set it all up instead of simply bringing the real deal along. Nah, taint hap'nin. Serious question now, If you are not playing or using a stack or Marshall type amp with a stack, wouldn't it honestly be just a wee bit hard to know exactly whats missing / lacking in most small amp into PA setups and understand why such a Marshall stack lovin player wouldn't be happy with the small amp deal? This isn't simply about a small amp sounding good or cool through a PA, it's about the need for a stack being over. Dat'sa not gonna happen. Ever. It's shark week tomorrow & the waters have been sufficiently chummed & baited. Luv yous guys.