godsfshrmn

Would it create a problem to use the same ground as my battery? I am getting some random feedback in my subs and I am curious as to if that is the reason. When I first start it they will start hitting really loud at random times for the first mile or two then they're fine.

roccityroller

are you getting feed back or just random variable volumes? those are two different issues, also a little more info on your setup may help.

Pontiac.G5

where do you have you signal cable ran... they may be gettin interferance from cable near by...

with the ground... try sanding around where you have it attached to the frame and reatach it and have sure it doesn't move when you pull or push on it... that will make a perfect ground... but definitely make sure your signal cables aren't around any power cables because that would be the biggest problem

godsfshrmn

It is more of a constant mid-bass tone that I am hearing. The music otherwise sounds fine. The input for the amp is running off one of the rear deck speakers. I am using speaker-level because I am using the stock H/U.

roccityroller

If feedback is the problem this is most likely the cause. in higher power systems with a good amount of current, if you're RCA (signal) cables are run on the same side of the car as your power cables, the signal cables will actually pick the interference from the electrical current in the power cable. This would cause feedback that would vary with the speed of the engine.

however, if your problem is variable volumes then most likely it's your ground. You either have a bad connection to your ground (not tight enough) or the ground just isn't good. as mentioned above you can either sand the spot your grounding to or just try a new spot. remember though, the shorter your ground wire the better performance you will receive from your setup

make sure the connections to your amp are clean, i.e. no random strands of wire crossing over from one input to the other. this could cause interference, other than that you may want to try to drop the gain on your amp a bit as it may be trying to put out too much.

godsfshrmn

Should I try to tap the wire going to the stock sub instead of the rear deck speaker?

roccityroller

yes! if you have a stock sub, i would think that would be the best signal to tap. because that signal will be a low frequency input as opposed to your rear speakers which are most like mid-full range inputs. the amp may be seeing higher frequency signals from the speaker wire and doesn't know what to do with them. What kind of amp are you running?

godsfshrmn

Its an old MTX 6152 amp. I had this setup in my s10 i had before my car. It can do either 2 channel full range or 1 channel mono. I adjusted the crossover freq on it so I'm wondering if that would make any difference. I'll see what it does after lunch.

roccityroller

i don't think your crossover frequency would have much to do with it, does the amp have two sets of inputs? I.e. low input (RCA cables) and high input (different kind of input)

godsfshrmn

Yeah. The 06 head units dont have RCA output do they?

roccityroller

no but if you can get a low freq signal then you can buy adapters to make speaker wires to RCA outputs. Radio shack should have them. Check your ground first though, that's the easiest/cheapest fix.

godsfshrmn

Well I'm now doing like you said, using RCA input running off the stock sub and I moved my ground. Past maybe 1/2 on the gain the speakers put out the same frequency sound wide open, regardless if the volume is turned all the way down. The power cord is well out of the way of the rcas. I can't figure out why its doing this.

It looks like it is because I'm changing the impedence on the amp. When the RCAs are not plugged into my amp, the stock sub works, but if they're plugged in they don't work. It looks like I will have to unplug the stock sub?

EDIT: OK I unplugged the stock sub and used the stock wiring directly into the amp. I'm still getting the feedback after the gain is turned up.

Pontiac.G5

i'm stumped lol... how did you wire it to the stock sub... draw a diagram of how you have it setup... or check mine and see if you can do the same thing... of coarse without the crossover tho... jus use the speaker adapter lol

here's mine



mine uses the same ground as the battery if you were wondering

godsfshrmn

I just split the wire going into the sub and ran it off that. It looks like you ran it off your rear deck 6x9s? Did you upgrade those and if so, did you notice a huge difference? I notice when I move the fade to the rear I have NO highs at all. I was thinking about maybe a three way 6x9 for the rear, but they would be unamplified of course. I'm guessing that would cause the sound stage to be almost all in the front area of the car because I'd leave the tweeter and door speakers alone.

Pontiac.G5

i did not upgrade my speakers... n that would be fine