Guys. I have installed a jvc kd120 car stereo on my revo around 3 months na. Napansin ko lang this week na may erratic sound na lumalabas sa speakers on bass pg mataas ang volume. Pero nawawala naman pg ibaba ko. This is occuring during usb connection only. Pero pg aux at fm station d naman nangyayari. Ano kaya possible na dahilan?

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