View Full Version : is my hu messed up?????

01-22-2008, 08:54 PM
hey guys i have a alpine 7892 cd player and it has 3 pre amps f/r/s and im not shure if there is some thing wrong with it. now this problem just happens with the sub out it seems that every amp i hook to the sub rca's has to be turned up high to get it loud like where a sub amp should be. like i have a memphis m class 500w sub amp in my escalde with 2 m class 10's and is turned up about half way and sound really good then when i put that amp in my camaro that has the alpine hu the amp has to be turned up almost all the way and i also has a alpine mrv f250 sub amp that i had the same thing happen. i know its 2 volt pre out's.help guys and if ya got any questions post up!:confused:

01-22-2008, 09:23 PM
And Im guessing you adjusted the sub level from the H/U also ??

01-22-2008, 09:44 PM
yes i did.

01-22-2008, 09:49 PM
Might just have to raise the Input sensitivity on the amp to make up for the 2 volt preouts on your H/U.. If you do this and it still seems weak I'd suspect something is wrong with the RCA outputs or the RCA wires themselves

01-22-2008, 11:26 PM
so if i get a new hu with 4 or 5 volt pre outs it will have a stronger signal so ill turn my amps down a little?

01-23-2008, 02:01 PM
Somewhat typical of alpine HU's... unfortunately.