I have two 15 inch MTX Thunder2000 subs w/box and a Pioneer 600 watt amp (model 6903) 2 channel, with a built in crossover. The subs are in good condition and sound great. The amp is new and I hooked it up to the 2 15's and it pushed them but barely . so I was going to have to get a 1200 watt amp to push these subs or just get rid of it all and start over....so thats what I am doing...I am wanting at $400 for both subs w/box and the amp...but I am taking reasonable offers. Price might be neg. with trade.