us amps vlx-4150x noise proble

[RPM 0]

have an ms8 going to this amps with epcc engine whine....swapped different outputs form the ms=8 and realized the ground noise is only present int he front rca's of the vlx-4150 no matter the source of output from the ms-8

if i plug in the rears only no engine noise...could this be a defective amp?

[Impious 1,476]

Possibly.

Do you have a separate source, like an Ipod, you could plug in directly to the amplifier?

[RPM 0]

okay so i plugged in the ipod..engine whine gone :S but i don't understand why there is none with the rear inputs plugged in only... im guessing maybe a grounding problem with ms-8 just redid the ground still noise ..

using high level inputs run from behind deck to ms8 which is mounted on rear seat of van..car is a Hyundai tucson 2011 model

Edited April 24, 2012 by RPM

[Impious 1,476]

Noise Troubleshooting Guide

[Briggiboy33 2]

I had the same thing happen with my system. I sent my headunit in to be checked.. Its being repaired right now.

[RPM 0]

thanks again impious

brigg i got it sorted did over the ground again and upgraded neg ground on battery and its gone! cheers!