Noise supressors

[gmagnan]

I got my Alpine 2554 amp installed at a local Car audio shop. I'm using it just to power my full range speakers, no subs or anything. I'm using the stock radio with line out converters, one of which is situated right behind the glovebox.

Problem is I can hear my engine through the speakers, like a constant staticky clipping at idle and a high pitch whine when I engine brake. Also the ventilation fan makes a lot of noise on 3 or 4. I brought the car back to the shop the next day but they didn't succeed in fixing it, so much for customer service So after waiting for 4 hours in the shop to have my car come out the same I've pretty much given up on the idea of having them fix it. I'm using 16 guage wire, 8 guage for power both decently shielded (Stinger 200W RMS amp wiring kit). My amp power and speaker signals run through different sides of the car. The splices where the speaker levels input enter the converter are exposed, could this be a potential noise issue? I asked the tech and he told me no, but I don't trust him.

What can I do ? Is this normal when using line out converters ? If I install a noise supressor will it go away ? Whats the best way to isolate the connection going in my line-out converters ?

 

[1sty]

The Noise supressor will not stop the noise.
Is anything else wierd in the system. Battery in the back perhaps?

How close are the RCAs and and power wire?
Are the speaker wires run with the RCAs?

The tech was right a exposed wire won't be a noise source.
Though, they should be covered to aviod shorting out.

Check to make sure The RCAs are passing proper continuity. Ground and signal. Also be sure they are not shorting out.
The amp itself amy be bad.

 

[gmagnan]

Thanks for the quick reply man

The battery is in front, the power runs on the driver side under the edge of the carpet, the front RCA and rear speaker level input run on the passenger side, crossing through my rear seat to the driver side of the trunk where the amp and rear converter are.

What is proper continuity exactly ?

 

[1sty]

You need a multimeter to test continuity. It is proper connectivity from one thing to another. In your case you want RCA tip to "ring" test positive from the other RCA tip and not to the sleeve. Any continuity from one RCA top to the other or sleave to tip is bad.
You want all sleeves to ring to each other. And only one tip to the other sides tip and nothing else.

Another good tet would be to test the voltage across the amps power and ground terminal. It should be very close to that at the batteries terminals.
To clear the amp of issue, swap it into a buddies car you know is clear of noise issues in the speakers.

 

[gmagnan]

Can do !