alright, i'm reposting because I got my amp. The speakers that i hooked up sound like crap, so I'm looking to buy one or a pair of subs to replace them. I don't know what brand to buy or what kind of subs I need.

As I stated above, I have a jbl bp600.1 mono amp. Do I need subs with RMS of 600W or max output 600W?

And what about ohms, the amp says 2 ohm stable, but I'm not sure if it is 600W at 2 ohms or not?

I'm new to this, so any suggestions will be helpful.