I actually had a pair of the old school CV XL10s in my 95 running off the stock amps. Worked rather well as a matter of fact. Of course the CVs are super efficient and the vented enclosure just added upon that. Not rock pounding bass, but a decent blend. My only complaints are the crossover point and slopes on the stock Mach system. Good for the small factory drivers, but too high for subbass. Lends to a sloppy sub. You can forget about headroom when turning it up as well.