Car audio, noise at the speakers?

Question

I have Honda accord 2007 Se 4 door. I bought JBL gto 75.4 Amplifier and my front speakers are Infinity kappa 63.7i and the rear speakers are infinity kappa 693.7i. I use the OEM head unit, and therefore I can not use RCA cables to run the signal to the amp. However, the amp has high level inputs. I took the high signal from the rear speakers and bridged it with the input to both front and rear signal in the amp.

The problem: When the stereo is on, and nothing is playing the front right speekrs has some noise on it, and the rear left speaker has some noise on it.

Does anyone have any ideats why these two speakers are kinda noisy while the others are decent (have minimal noise, unnoticible)

I have checked all 4 speakers directly from the OEM before connecting teh amp, and all 4 were great.

Answer 1

If you are using the OEM unit you can buy a RCA adapter sold at any sound store. With this you can use RCA cables from the headunit to the amp. This might help with the sound.

Answer 2

Hi,  It sounds to me like you maybe have connected the wiring wrong.  It is hard to say without looking at the job.  

Might I suggest that the best and easiest way is to buy as mentioned by another user, a high to RCA converter and a set of rca cables.  

If not try the following:  Firstly it sounds like you have crossed the left/right wires with the front or rear input.  Suggest that you start again and place the left negative rear from the high input with the left negative rear input on the amp, same for the right rear as well.  Then cut yourself some "jumper" wire (pieces of speaker wire or similar about 2 inches in length, of course dependent on the length you need) and "jump" the left rear negative input with the left front input on the amp by placing one end of jumper cable into rear left high input and tighten with original rear left high from head unit, then place into front left high input on amp and tighten.  (Maybe this is what you have done already?)  Repeat process with right side.  If you have done this already, it also could be one of yoour speakers contacting the body of the car and causing some kind of feedback as well.  Also check the balance and fading on your head unit and fade to back and make sure balance is set in the middle.

Hope this helps!

Answer 3

The bottom line is that there is interference feeding back into your speakers.

When the stereo is on and nothing is playing, then the amp is on as well. Some amps (depending on construction) will produce feedback.

There also may be damage to the wires connecting those speakers or a poor connection somewhere. If the wires are exposed or damaged anywhere, that ,might allow for some interference to enter the line.