Switch Stock Deck?

I installed my sound system on my car last week but I was disapointed with the results. Here's what I have: Stock 2004 Hyundai Elantra GT Stereo (Kenwood KDC-MPV622) All my speakers are sony since I liked how they sound at Best Buy which are: 6x9 xs-v6933 50rms/240max @4ohm 5 1/2 FRC4306 50/100 @4ohm 12" subs xs-l121p5 350/1200 I have 3 RF amps: P8002 2400max, 200x2 @4ohm, 400x2 @2ohm, 800x1 @4ohm I have two small amps my borther gave me which say 45w RMS I'm not sure what model they are. DEQ-9200 EQ. Marine Blue Top battery (the biggest 12v they sell). Sound dampening material troughout. Problems It sounds bad, as in not good. I have really deep bass which is becoming disturbing. The EQ has some anoying static at low levels which I now discovered that it was common. I'm getting alternator noise when accelerating, and I think I heard my belt spinnig twice. I used some RF RCA's from the head unit to the EQ but the rest of the wires are cheap from ebay and osh. Questions. Does the number of strands a wire has matter with ony heat diffusion and flexibility, or is there something else? If I run 3 6gauge wires is it the same as a 4 gauge? Are there any shielded power cables? I was wondering if the head unit I have is good enough for my system or if I should install a sony cdx-f7700 I have. With the eq in place will it make a difference? Does anyone have any suggestions on what to change on my system? I bought all my speakers an my amp from Best Buy with an extended warranty (4yrs). They have been defective but I just retun them and get a new one or upgrade. This is the 3rd amp I have. One I just retuned and the RF 801 I last had blew. This is my third set of 12" I have and the second stereo. You gotta love waranties.Poly Dollies

I grounded all of my components to the same point on bare metal. My EQ has a control unit with a separete face plate extension. Now I realized that I ran the RCA cable right next to it and it provably has some power since it has to light up the face plate. I also ran the speaker cables to my front speakers righ next to the RCA on the right side of the car. I ran the rest of my power cables on the left side of the car. My grounds are good but I need to separate the EQ faceplate line away from my signal wires. But I still get an alternater whine with the EQ disconnected. Why do you think that my system is mismatched? I have all sony speakers, all RF amps, I'll try the sony deck in a few days, and I'll provably get rid of the EQ. I'll just have sony and RF. Isn't that a good match? When I install systems for my friend I take all the precautions to protect their systems but I like to push the little that I have to it's limits. It's not like I blow things frequently. This has been over the span of 2yrs. Should I upgrade to higher quality power cable? What do you recommend for the amount of power I'm pulling? Hope you can help.Poly Dollies

I would take out the EQ, and see what happends then, or find a way to ground your stuff straight to the chassis of the car, but im pretty sure that your engine noise is coming from a bad ground somewhere.