I have a KAC-929 and a KAC-749S..and I know they were good amps for there time..right now i'm running a z828 mp3 player on them and I want to run a kac-x879 deck now because my current one is dying..so I wanted to ask if anyone knew if those amps could be run with that deck cause i noticed the preout level of that deck is 5v..and i wanna know if that's just the max rating of the deck and if the amps i have right now can handle that preout level..i'm just getting educated on this stuff so help would be appreciated..thanks