Passenger Side Audio Problem?

[dcs90]

My friend has a 03 Vibe with the M + T option. Recently the right side of the car (both front and rear speakers) have been very low in volume, no bass response and scrambled if he tries to turn the volume up. The left side is completely normal. I would think it could be the speaker, but two blowing at the same time doesn't seem right? I played with the fader and balance, so its definitely just the passenger side.My guess is maybe the amp has a problem? I assume the amp is located under the seat? (I drive a 02 Trailblazer, I don't have any experience with Vibes)I was hoping someone could help shed some light on this and maybe some ideas on how to fix it. Thanks!

[zionzr2]

I'm no audio guy, but ya, the amp is under the passenger seat. You may try swaping side with the speakers. That way you will know right-a-way if its is the speakers or something else in the audio system.

[Mr GoLucky]

my 03 had the same problem, i just changed the whole audio system, Alpine CDA-9885 Head unit because it's red and matches the leds, and Rockford Fosgate Punch 100 door speakers, and a 4 channel alpine amp under passenger seat