Skaith4224

Hi All, I installed a new head unit replacing another aftermarket head unit that was there before. All went well except I still cannot get the front speakers to go any louder than a whisper. I thought at first this may be the head unit, but both do the same. I've taken the Bose amp out and performed the repairs to stop it from cutting out. Replaced the part rather than using something to wedge it. And still the front speakers are super quiet. Rear speakers are fine however. This is an issue on all front speakers in the car. Tweets, squawks and subs. Am I missing a second amp somewhere? Ive not checked all cables yet to see if there are any restrictions but that wouldn't make sense to me as the speakers themselves are standard. Any Ideas on how to diagnose better or what may be causing the issue? 2003 350z GT, Bose system Many thanks, A.