2x Sundown x-12 + SAZ 3500D V2

[Jeep03]

Yea baseman I been looking around the forums and just found out what those extra channels are for. Will get to it when I get out of work

Anyone care to give me some input on the humming noise from the subs?

[gr8handogoatness]

Bad ground or cheap RCA's running along side power wire.

[Nikitaaa]

The only swap was his amps....

So everything else such as subwoofer wiring is irrelevant (but not unimportant).

Lets try to narrow it down to amp ground, rcas, amp settings etc.

[bassman619]

Either poor ground connection or the cheap/ wrong wires.. you can get noise from rca wires that are not meant for your amp. Theres two kinds differential and single ended . Most high end amps like sundown need differential rcas..the way to know the difference is if you have the rcas with two twisted wires inside each wire javket its differential..usually if u cant see more than one wire in the jacket its single ended..another thing is I found sometimes you can get that noise from the prefab box terminals..if you absolutely have to use prefab what I like to do is pop the terminals out remove the metal connection and run wire straight through the holes of the plastic terminal instead of having an extra connection..and then I put thw terminals back on.

[bassman619]

Either poor ground connection or the cheap/ wrong wires.. you can get noise from rca wires that are not meant for your amp. Theres two kinds differential and single ended . Most high end amps like sundown need differential rcas..the way to know the difference is if you have the rcas with two twisted wires inside each wire javket its differential..usually if u cant see more than one wire in the jacket its single ended..another thing is I found sometimes you can get that noise from the prefab box terminals..if you absolutely have to use prefab what I like to do is pop the terminals out remove the metal connection and run wire straight through the holes of the plastic terminal instead of having an extra connection..and then I put thw terminals back on. Or it could also be a poor headunit ground..I like to ground mine to bare metal instead of grounding to the black wire on the cars harness

[Jeep03]

They are rockford fosgate rcas they are about 5 months old. Going to clean my ground real good in a bit.

[Jeep03]

It was working before. So I dont see how making a better ground to the hu would help. I even seapped back to the Hifonics amp and it was doing the same thing which it wasnt before.

[gr8handogoatness]

Redo the amp and HU grounds. Even if you think the are good, just do them better. That's almost always the problem.

[Jeep03]

FIxed the humming noise. Noticed it right away when i turned it on today and it sounded exactly like the engine of my car.

Put a speaker wire in the back of the HU into the RCA slot and it fixed it.

I rewired my subs and it still doesn't feel like 3500 watts. It feels exactly the same! I know because there isn't even any dimming in my headlights, looks identical to the HIfonics amp.

this is only a 130 alt thats been through 4 amps and lots of bass already....

I don't know what else to do at this point. Everything rattles but it all rattles the same as before. :|

[Miguels]

its the prefab box..