I would say memphis makes some of the best budget sub amplifiers that I have ever used. The secret is DO NOT buy them online! Find an "authorized dealer" to buy your amp from. Half the stuff online is crap (regardless of the name brand) because it's either "B" stock or refurbed. I have had the same memphis M class amp in my truck for the last 6 years w/no problems. I also beat the crap out of it. the shop i work at sells a ton of memphis product and we don't have any issues with the quality of that brand. The only amps that I like more than the memphis are the JL audio slash series and the ARC Audio amps.-Kevin