Decent monoblock amp for sub?

[Blu-Dog]

Originally Posted by BLindsay

my sub is dual 4 ohm voice coil so it needs to be around 500rms at either 8 ohms or 2 ohms (currently its wired for 2 ohms)

the polk one looked nice but it was @ 4 ohms, i just am not famliar with some of the brands so im just a bit hesitant having never heard them. and the first one is only like 150w

Bridged, the QSC is about 850W. But a word on power ratings for car subs: Don't believe the hype. Car amps aren't anywhere near as linear in power output as line-powered amps (hence the use of caps to keep the output high), and a good line amp will fry the coils on the average car sub at sustained levels.

You can get away with much lower power levels, and it will be cleaner, with a typical line amp. Even the QSC 850 in non-bridged mode has plenty of power for your purposes.

The R12 line are power hogs - but they are very clean, so once you get past the minimal power level (I'd guess 50 to 75 watts), they're going to deliver for home theater just fine. Peaks probably shouldn't exceed 300 watts for more than a few seconds. You could get another R12 and really make some noise if you wanted.

Think it over - it's a bit of work, but it would definitely pay off in the right sealed box. I have two Infinity DVC 10" in my pickup - 4 ohm setup - and they are very, very, very clean, driven by a 300 watt amp.