What I have found with so called cheap amps such as Profile, Jensen and
Pyramid is that you have to crank the hell out of them to get deep bass. Where
more costly amps such as Orion, Kicker, PPI and MTX seem to produce deeper
bass at lower volume levels. I also found that these cheaper amps seem to run
a lot hotter. The only reason for this that I can think of is an inadequate
power supply.


In article , "Mark Zarella"
wrote:
I should add, by the way, that there are additional reasons for buying
better built amplifiers. But none that I can think of that directly relate
to "clean" vs. "dirty" power. For instance, when you're driving low
impedance loads, some amps crap out sooner than others. When you're driving
an amp to its limits, some overheat and shut down. "Better" amps often
don't. But I think you'd be quite surprised to find that there are some
pricier amplifiers that are less stable under these circumstances than
others. For example, I've had a tougher time with Profile amps overheating
than Jensens, yet the general concensus among car audio groups is that
Profile amps are supposedly "mid grade" whereas Jensens are "junk". I'd
actually put some of the newer Jensen amps up against Kenwood, Profile,
Sony, Audiobahn, Alpine, etc in terms of reliability.