Separate names with a comma.
We found the problem. The problem was the speaker wires was changed. So - + and +-. And thats why was no bass.
I checked the headunit, amp and speakers and all good. Maybe some wireing?
Thanks ur help. The amp is good is new. I try to test the speakers. How u mean deck? What is that?
Anyone can help why no bass? Seems everything is good. I tried in the menu but nothing. Any idea? JBL
Yeah your amplifier is gone. Which is underneath the driverside seat