My problem is that the left speakers arent as loud as the right speakers and I sit in the drivers seat. The right side is louder even when im right next to the left speakers. When I listen to the same CD in another car, the left speakers are louder or equal to the right side. I have a alpine CDA-9853 head, in the front alpine component type R 6.5" spr17ls speakers, in the back alpine type R 6.5" coaxial spr17lp, and a 50X4 alpine V power amp. Couple times there was a loud buzzing sound from the left speakers. I havent heard the buzzing sound for a while, but I know something is wrong. I took it back to the place where they installed but they told me that some cd's are recorded with the volumes not balanced between the left and right channels to make it sound like its the CD, but I know thats not the case, I've listened to many CDs to test, and the left side is always softer than the right side. I dont want to use balance becauuse it doesnt sound right. Can anyone help? Thanks
I am guessing that you have the Alpine MRP-F240 amplifier.
Use process of elimination;
Switch the left speakers and right speakers wiring AT THE AMP TERMINALS ONLY. This will eliminate the possibility of the amp having bad left channels.
Has the problem reversed?
If so, then it's your amp.
If not, then check the HU the same way.
Other things to take into consideration are;
Check your RCA's (swap them out with another set)
Check your Gain settings on the amp. Does this amp have separate left and right channel Gain knobs? If so, are they both at the same level?
"Couple times there was a loud buzzing sound from the left speakers"
It may be a short somewhere in the circuitry. Ugh this = spaghetti. Is the amp installed in a secure place where nothing may come in contact with the terminals on the amp? Make sure that nothing may cause a short.
It may be that there is interference between the audio wires (RCA or speaker wires) and power wires. This happens when the audio wires are near power wires. Rule of thumb is to keep audio wires away from any power wires.
This interference may have caused permanent damage to your amp or HU.
I reversed wire at the amp , but it did not reverse. I dont feel confident trying the HU, because I did not install it. This sucks i only had it for less than a year and there's already a lot of problems.
Well, you already know the CD explanation is a line of BS. In addition to what mixneffect has already said, most cars do have a right side bias when the speakers are in factory locations. Japanese sedans (Accords, Civics, Camrys, etc.) are pretty bad for this in my experience, I don't have a clue what you drive, though. Different cars give different results. This is the downside of having a left speaker far off axis with the right side closer to on axis, a good bit of midrange and treble will be louder from the right side. You can't really fix that unless you get speakers optimized for off axis performance or you do a custom installation such as angled door locations or kick panels. Balance helps, but it doesn't fix the problem. If you were to lean forward directly in line between the speakers and the left is still quieter, then the problem lies within the electronics or perhaps a bad speaker.