im not sure wjay ohms it is but do you think this would be a good amp
http://cgi.ebay.ca/New-Legacy-2-Ch-2000-Watt-Car-Stereo-Amplifier-Sub-Amp-/160604089381?pt=Car_Amplifiers&hash=item2564bfec25
No no no no no no!!!!!!!!!
could you suggest a good amp?
First off, legacy isn't worth a shit, your never going to find a 2000w amp for $80, that's just a trick to trick you into buying some shitty amp that does 50watts rms. Look man, don't rush yourself, you won't en up happy and you'll have to buy something twice! Which will cost you more in the long run. You get what you pay for in this game.
Second of all, for your subs, 99.9% percent of the tine you are going to want a class d monoblock amp, not a 2 channel or anything really besides a class d monoblock.
Last but not least. YOU HAVE TO KNOW THE OHM RATING OF YOUR SUB... It's crucial!!!! Once we figure that out we can begin looking for an amp! Don't even look at amps right now, your wasting your time! Go pull your sub out and look at the back, figure out what ohm it is, if it doesn't say, find a multimeter and set it on "ohms" put the ground in the ground of the voicecoil, and the + in the + of the voicecoil and see what the number is! If it's at 4 or around 4 then it's dvc 4. If it's at or around 2 then it's dvc 2.
Don't get ahead of yourself, trust me