whats up everyone? so heres a question that i guess is kinda noobish. i recently had some problems with my deck, and after trying to remount it and clean the laser i decided its time to upgrade, so i did. i went from a pioneer deh-3800mp to a deh-4000ub i had in my other vehicle. now, from what i gather, the 4000 is a more powerful output. that said, when i plugged everything in it was significantly louder at the same volume (35).

my question is, should i readjust the gains on my amp? i've been fiddling with the deck (still trying to fine tune this one 2Q 1Q 1W 2W stuff), and i can significantly reduce the sub volume, but i'm wondering, should i lower the gains on my amp to compensate for the more power from the head unit?

You should set the gains correctly based upon your output voltage from the head unit using a constant test tone signal.