Hey guys i recently installed an aftermarket HU and an AMP with subs in my 1997 infiniti q45 with the bose system. I know about the output adapter that crutchfield sells http://www.crutchfield.com/p_142C4NN03/ ... ml?tp=3486 but it is not applicable for my car. i have 6 stock speakers all powered by the stock amps. the adapter they have only has four channels. the problem im having is the sub isnt getting enough juice and when raising the headunit volume the stock bose speakers are getting way to much juice. is there any alternatives or is there an adapter for my specific car i cant seem to find it anywhere or any solutions to my problem. i was thinking about gettin http://www.ebay.com/itm/Car-Home-Amplif ... 3a7802f35f which will boost the rca signal to the sub amp to try to level it out. other then that im completely baffled on how to fix this issue. thanks in advance.

Were you able to figure the issue out because I'm getting g ready to do the same thing in my y33 and I don't want to encounter that same issue any advance would be greatly appreciated

You probably have to adjust the gains on the amp to get everything dialed in.

The best adapter to use is the PAC roem-nis2 to connect your head unit and adjust the gains accordingly. What's most likely happening is your factory amp is recieving too high of a signal and making your stock speakers louder than what they should be also adjust the gain on your sub amp up to about 75%.