hey guys i recently bought my skyline and it used to be a mb quart filled demo car from gt autosound in adelaide. anyway when i bought it he couldnt sell me the speakers cos they werent his, so to be a nice bloke he bought some sony xplod subs and 2 amps for me 2 install when the car got 2 me,(and yes i do realise sony xplod are crap) but i dont care i dont want them i just wanna fill in the holes no point havin fully sic boot that has no doof lol anyway, i dont know that much about amps and the 2 he has given me are xm 754hx which is your normal run of the mill amp, and xm-504x which is a stereo power amp (see pic below) ,and i have know idea what the xm-504x is for is it for my parcel speakers?? or is it for one of the subs i got no clue please help
ps sorry for the bad grammer and if its a noob question cheers