Ok, so after doing a little reading, I bought a US Acoustics USX-4065. A few stats on it:

65 watts RMS x 4 at 4 ohms
80 watts RMS x 4 at 2 ohms
160 watts RMS x 2 bridged output at 4 ohms
2-, 3-, or 4-channel output
4-ohm stable in bridged mode

Not bad for $100 I suppose. Im using it with a HU that has no amp.

Im looking at a couple different JLA or Infinity 6.5s or 5x7s. The thing is, most have a RMS of 55-100rms, with 150-300max RMS and says the impedence is at 4 ohms.

1)Can I run the amp at 2 ohms for the 80rms if the speaker is 4 ohm?

2)Will these speakers sound underpowered if Im getting that 65-80 rms?

3)Can I run it as a 3 channel and have 2 channels into my door speakers, and then 1 channel running bridged at 2 ohms, instead of the 4 ohms(160 watts)? Im guessing no since it says 4-ohms stable in bridged mode. <--not that important of a question, just doin some thinking

Thanks in advance for any replies.

 

1) No

2) No

3) No, 4ohm bridged is the lowest.