I installed a Pioneer HU with front, rear and SW preouts, and ran the stock speakers from the built in amp an bypassed the stock amp. The HU improved the sound and had no problems. Then I added some new front speakers, better sound and no problems. I then pulled the factory amp and intalled a 2x100 amp in it's place to run the front speakers, even better sound and no problems. I ran a 10G from the battery. I was able to purchase a 4x100 cheap so I figured I would use it to run the 4 door speakers and the 2x100 to run a sub in the future. I was advised if I was going to run 2 seperate amps I would need to run a 4G and 8 or 10G to the amps. I upgraded to a 4G power lead and split the power to a 9G to the amps behind the dash. I installed the 4x100 under the seat and grounded it to the seat track. The sub amp is connected but nothing is attached to it.
The problem is that when the HU is turned down to 00 there is an audible hum, as soon as the volume it turned to 01 the hum goes away. This would not be too bad, but the hum is present when switching between EQ settings or when changing radio stations. The hum wasn't there before so I must of done something wrong, but I don't know what? When the volume is turned up the sound is great and clear with no hum. I played with the gain in it's maximum and minimum settings but that doesn't affect the hum.
Can anyone help me
Sorry for the long post but wanted to give as much info as possible.
