Amp peak power twice RMS power?

I'm looking at a Profile amp ( here), and I can't find the actual peak power @ 4-ohms anywhere. All I can find is that it's RMS power @4ohms is 480x1. So should I assume its peak power is about 900 watts-ish?

don't really worry about peak power, when looking for an amp + speaker combo always look at the rms power, but to answer your question it probably is around 900 watts peak, but remember that is at 14.4 volts, you will see probably less watts if your alternator/battery/wiring is not up to par.

Why do you say that's at 14.4 volts?

No. Peak is just peak. Really doesen't matter. RMS is 0.707 or 70% of the wave. That is the industry standard for the average workload output. So 700 RMS would be 1000 Peak. Not 2x RMS.

So if I'm looking at a sub ( Kicker L5), and the rms is 450, and peak is 900, I should be okay with a 480 rms amp, right?

Yep. Don't even look at peak for subwoofers. Only RMS for both drivers and amplifiers.New Project: 2003 Pathfinder

Alright. Thanks for the help. One last question... I'm putting one 10" in my new little reg. cab Tacoma. Looking to put roughly 300watts rms in it, but not spend over $200-ish for sub and amp (probably end up buying them off of eBay). As of now, I'm looking at getting either this Kicker CVR102 or this Alpine Type R. And they'll probably be powered by this Profile amp. Any suggestions on which sub to go with? Or suggestions on a different sub that'll run about ~$100 (eBay) and take about 300watts?

I'd buy that Alpine over the kicker any day. If I was on that kind of budget I'd buy a $70 Dayton subwoofer from partsexpress here: http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=295-555 Then buy a better brand amplifier than profile. http:///.com/dll?ViewItem&category=18797&item=5750430193&tc=photo I am confident this would provide better sound than the previous system. New Project: 2003 Pathfinder

That amp is 150x1rms, and it's $170 with shipping. I can get a 310x1 Profile for $115 or less shipped. and I'm going to build a sealed box, but I figured that'll cost me like $20 or less.

Also, when it says "Bridged Power Output at 14.4V (1kHz, 0.8% THD): 460 Watts x 1" What happens when you run it at 12v? Or can you run them at 12v?