more power out of a amp

sinlge voice coil and i bought the amp off of a buddy at work he said it puts out about 800 watts he called it a rockford cheater amp the amp itself has nothing on it about watts or anything thats all i know

Nope, that's impossible.  If you connect any two loads to any amplifier they will share the amplifier's output, period.  It doesn't matter if they are connected in series or parallel, they will share the output (albeit in different ways.)  Whoever told you this is either ignorant about electricity, lying to you, or just mistakenly believing a lie someone else told them.  Find out the lowest safe impedence load the amplifier will handle and connect your subs so they do not present a lower load than this and you will have the "most" out of any setup.  There is no magic to it, it's physics.

thanks dyohn i talked to the guy that told me this and he said to hook sub1's neg to ch1's neg on the amp then to hook up sub1's pos to ch2's pos on the amp then to hook sub2's neg to ch2's neg on the amp then to hook up sub2's pos to ch1's pos on the amp would this do anything except confuse me. haha  thanks again

Doing that would be pretty cool actually, it would definately bang when the amp explodes in your face..

Seriously tho, if we have no model number of your amp then we cannot reccomend anything, your pretty much not going to get a solid answer unless you can get us that info some how.

And do you know the model of bandpass box you have? or link to where we can see info on it?

I wish we could just give you an answer, but every piece of equipment is designed differently.