Question about the Orion 425 HCCA

Can I use this amp to run my set of subs? And if so do I need to adjust the circuits in it? The person I traded it for said I might need to because he was running his 6x9's and front speakers off of it.

I don't know of any adjustments required .... that is a cheater amp.

expected power (I think I did the math right):

4X25 or 2X100 watts @ 4 ohms
4X50 or 2X200 watts @ 2 ohms
4X100 or 2X400watts @ 1 ohm
2X200 or 2X800watts @ .5 ohms
4X400 watts @ .25 ohms

Not really a good choice unless you are gonna multiple subs so you can load it down.

I am running two Rockford P3's and this is the amp I am currently using, would that Orion work better than this?

MTX Thunder 4202
http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=11541

And what do you mean by cheater amp?

way back, a long time ago (probably before you were born), IASCA used to rate amps at their 4 ohm rating for placement into a category for competitions. That amps is rated at 100 watts RMS for all 4 channels but can easily put out 1000+

if it's in good shape, it's WAY better than anything MTX. The problem is gonna be loading it down to get the power out of it.

man when i first got into car audio i wanted two hcca Orion amps with 4 cerwin stroker 18s soooo bad lol.... if you go to sell this amp let me know bro cause the amp is great for multiple sub applications (as Paul said)

How in the world can I wire this thing to two subs to were I can get the most potential power?

get two subs that are dual 2 ohm and wire them in parallel, then bridge it so you have just 2 channels.