Audio Systems: Bass full of static - even at low volumes, rockford fosgate, channel amp

Question
QUESTION: hi scott, a couple days ago i was hooking up some wires to my deck in preparation for an amp and sub, i thought everything went perfectly until i turned on the music, the bass is distorted and full of static, it sounds like someones blowing into a microphone, even on low volumes its pretty loud so i have to keep it it below hearing level sometimes.. i went back an unhooked the wires thinking that would solve the problem but it still happens..

ANSWER: I need some more info to help determine the problem.

Stock or aftermarket head unit?
What "wires" were you connecting?
Are there any other devices used (ie. a line-level converter)?

The full specs of the amp and subs would also be helpful, model numbers would be fine too.

---------- FOLLOW-UP ----------

QUESTION: its aftermarket head unit and its a pioneer 50w x 4 mosfet im not sure of the exact model all i know is that its an older one if that helps at all.. the wires i was connecting were rockford fosgate cables that hook up your amp to the deck (dont know name of wires) and there are no other devices hooked up to the deck.

the amp and sub arnt installed yet but they are Insignia® - 1000W Bridgeable 2-Channel amp model #NS-A1000
and a Sony - 10" Single-Voice-Coil Sub model #:XSL104P5B

Answer
Well, I see all kinds of information that amp is brideable, but the odd thing is that the peak and RMS are the same when bridged:

155W RMS x 2 @ 2 ohms
110W RMS x 2 @ 4 ohms
320W RMS X 1 @ 4 ohm
320W peak output @ 1% THD, bridged

So something isn't right.

The peak and RMS should be nowhere near each other even though peak is a useless number.

Is the gain set right? Improper gain settings will cause distortion. There is a link to a guide on my site that helps with this - http://spkrbox1.spaces.live.com If you don't have Microsoft Excel, let me know.

Check the ground. If the ground wire is attached where there is still paint on the connection, it must be scraped away and be shiny metal. This can also cause the problem.

Is the sub in the right enclosure as recommended by the manufacturer? a sub in the wrong enclosure can sound bad or can even be damaged.

If all else fails, I would look to a CEA-2006 compliant mono 300 watt RMS @ 4 ohm amp instead.

Oh, they are called RCA cables if they look like this - http://teachdj.com/images/rca-cable.jpg