What would be a good 4 channel amp that does around 75 + rms X 2 on one channel and then I can bridge the other channel. Im looking at about 300 rms X 1 on the other channel so instead of a 4 channel would I be looking at a 3?

I dont need a 5 ch, because Im only going to be running 2 components up front and a sub in the rear, currently I have 2 seperate amps but want to streamline and use only 1.

I've been happy with my Fusion fp4-500x; a few years old now but never a problem. I've only used it to power fronts and rears so I'm not sure about its bridged capability to a sub.
The numbers are close to what you're looking for.
65 x 4 into 4Ohm
250 x 2 into 4 Ohm
You can run the front channels separate and bridge the rear two.
fp4-500x

Gene

My Alpine MRV-F505 will do around that. Not sure what you're looking at paying. I think they go for decently cheap on eBay when they show up.

Otherwise, any 4 ch amp that is 75x4 will do what you're looking for. As usual, I would suggest against MTX from personal bad experiences when bridging.

any thoughts on the xtant 403a?

or pheonix gold octane-r 80 X 4 i think it was

Gotta watch the ratings on the Octane R lineup, I think they usually give max power on those. Kicker makes a nice three channel, the KX550.3. Does 85x2 at 2 ohms, and 420 into 2 ohm mono on the Class D output. http://www.kicker.com/ShowPage.cfm?f...ml&menu=KXAMPS

Bazooka does a three channel also: http://www.sasbazooka.com/productAut...sCS.asp?id=193

Not as powerful though.

I have been very pleased with the performance of my Orion 8004 (100rmsx4, 400rmsx2).

I've run it in 4 channel on comps, 2 channel on comps, and 2 channel on a pair of 12's and it has proven itself very powerful/clean/underrated.

Nice crossovers (if you need that), and nicely constructed.
It can be found on the net for a good price.