450w per sub or total? Are they dual voice coil subs? Single? Are they in an enclosure? How is it wired? Do you have a budget? Do you want decent performance or do you want to wring every last bit of output you can get from them?
IM not entirely sure what the model number is because it is an off brand. There in a ported box with the termianls on the outside. I have a budget of under 400 and i would like decent preformance. Also i hate to say i dont know if they are dual or single coil.
Since they're already enclosed and there are terminals on the box you don't need to know much other than the resistance at the terminals.
You need to get a digital multi-meter (DMM) to do that. Wal-mart has them for $10-15, or if you have a harbor freight locally they usually have one for $5 or less.