Amp peak power twice RMS power?

...And one last question... I could buy the Alpine SWR-1241D which has a dual 4-ohm voice coil and just wire it in parallel for a 4-ohm load, right? (I ask because eBay doesn't seem to have any dual 2-ohm voice coil Type R 12's right now. And I plan to wire my sub at 4ohms)

They simply put out less power at 12v. I wouldn't put too much stock in the power ratings Profile lists. The Memphis amp is probably just as powerful as that profile and is undoubtedly cleaner. There's a reason the "300w" profile is cheaper - it isn't a good amp. Also, you must learn that the MAX SPL difference between a full 150w and 300w is only 3db. 3db is small. 1) Why are you bent on wiring your sub at 4-ohms? 2) dvc 4-ohm cannot be wired to 4 ohms... 2 or 8 only. I wouldn't try one. New Project: 2003 Pathfinder

It's not that I'm bent on wiring it at 4-ohms, it's that the Type R that I can get cheap on eBay is dual 4-ohm. So how would you recommend wiring that?

How cheap is the type R on ebay? Its $95 on Ikesound.com I have that Memphis amp, its definatly a powerful amp, I had it driving 2 subs and it worked great. Im not using it anymore b/c I bought a JBL 600.1, but the amp is for sale, PM me if you are interested. Its like new, only used for a few months.

Haha. Actually, I was going to buy it from Ikesound's eBay store. About $89+shipping

So when I wire the 300watt sub into 2ohms, what happens to the power? Will it still want 300watts rms?

yep, still 300 watts....

One more somewhat off topic question... Some guy was trying to say it wouldn't be possible to hook a amp/sub setup to this Pioneer headunit. Does anyone see anything that wouldn't allow that? I think the words were "No preouts for subs" But that's what preamp outputs are, right?