Just installed. What is wrong with my sound?

[npcout 10+ year member]

Alright guys, i just installed my 2 amps, (2 channel bridged mono for my sub, and 4 channel for my 4 speakers)

I ran 2 seperate power wires, 8-gauge for 4 channel, 4 guage for 2 channel amp) My 2 channel sub amp is fine.

Now my problem is with my 4 channel amp. I have settings on my amp that allow me to change the levels of the front speakers and back speakers like making the voice or words of the songs louder. When my engine is off, im just playin music everything sounds fine. But when i turn my engine on, a humming sound comes from the speakers. If i turn the settings up on the amp the humming sound gets louder, but if i turn the main volume up on my hu nothing changes. If i make it low enough on my amp so u cant hear the humming sound, its so low that you cant hear the words.

Please guys.. somebody help me, i have no clue what to do, or what it is.

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[pwnt by pat 10+ year member]

Are both amps grounded to the same place? Did you sand down to the bare metal when you connected the ground?

 

[npcout 10+ year member]

yea, both amps are grounded to the same place. Also my cap is grounded at the same also so all three ground wires are ran there.

Also, i heard maybe its because my RCA's are ran on the same side as my power wires.

Could that be it?

 

[pwnt by pat 10+ year member]

maybe

 

[ToyTundra 10+ year member]

unplug the RCAs and see if the sound goes away

 

[GO-N DEF 10+ year member]

Is it me or are there two posts???

http://forums.caraudio.com/vb/showthread.php?t=138114

 

[npcout 10+ year member]

Hey, sorry about the two posts. I did that only because this is really stressing me out, and i wanted to get the most answers possible and i no some people dont visit all sections of the forum.

Also, should the cap be grounded to a different spot than the 2 amps?

 

[Dj-torn 10+ year member]

1. Are you using Hi level inputs or low level inputs? If Hi try using HiLow converter

2. Are you running your RCA or speaker wires close to any power wires?

3. Try regrounding your HU

Thats all i can think of for now