when i bought my gt it had a mephis amp in it with some old subs. i bought my old system back i had in my se that i sold to buy the gt. long story short i fried one of the 12s because the amp it was on wasnt stable at 1ohm and it was like 1am when i tossed it in and only wired one sub to the **** amp. shoulda waited and threw in the diamond. but i bought a replacement for cheap so it all woorked out.