dsa2402

During the summer I had all new speakers put in. With these speakers I also had an amp put in. The store I bought and had these installed in said that my car has a powerful electro magnetic field. This field causes a slight static in my speakers when my amp is turned down and a large amount of static when the amp is turned up. Also there is a Whine when the engine revs. When the RPMs go up so does the sound. Any idea how to fix this? I already have two ground loop isolaters pt in which are supposed to help. But They only help a little. It is really annoying because i have to keep my amp turned down way low. PLEASE HELP!!!!

Thanks

sc250tt

seriousely manthis sukks i connected a aftermarket amp to my factory head unit this weekend and there was so much static i had to turn the gain all the way off .still alot of engine noise but way better .dont they sell some type of gadget to get rid of the statics?

dsa2402

Well the only thing really is a Ground Loop Isolater. But these can only do so much. I want to know if there is anything else.

sc250tt

if you turn the gain down it will get better ,but you will still hear it .

dsa2402

I do that. It does get quieter that is true but then the speakers arnt as loud. I already have my gain turned way down.

mkorsu

All I can say is that it's a poor install. Many here have either replaced their system with complete high end, or simply upgraded parts with NO static whatsoever.

Check EVERY ground connection. Even take each ground off, sand off ALL paint to ensure there's a good connection.

Long shot here and I have no idea why it's so but...........

I assume your amp is mounted in the trunk? What side of the car is the power lead on? The driver's side? I'll bet it is. Always run the power lead on the opposite side of the car as the battery.

sc250tt

with an aftermarket radio there is no static but a big hole in the dash .im trying to keep the interoir as stock as possible but have quality sound also

dsa2402

I have an aftermarket stereo and i have the problem. I will check my grounds and see if it helps

salimshah

There are books (500+ pages) that discuss em noise and isolation techniques.

One needs experinced installer to minimize noise. One technique used is to figure out the source and point of interference and then apply a fix.

Lexus employs differential signal for low level (non-amplified) signals, By running the L+/- and R+/- the noise is cancelled when the receiver does a a-b operation.

Noise on Audio signals:
Sheild audio signals.
Run differential signals. [hardware implications specially amps/receivers]
Keep audio signals away from power (dc) and noisy lines.
Cross all other lines (if you must) perpendicularly.

Ground loops:
Ideally use a single point to ground for all audio equipment.
[having muliple ground locations may cause more noise]

Power Line noise: [intense in car environment]
Use chokes (inductors) and large capacitors in line with your audi equipment.
Good voltage regulated supply.
Good solid ground.

If every thing is tamed as much as possible, listen to the music louder. With larger signal, the signal to noise ratio gets to a point where the signal overwhelms the noise. Quiet passges and gaps are another story

Salim

sc250tt

RCA CABLES HAS ALOT TO DO WIT STATICS TOO .But i spliced in the factory amp wires to get the low level signal so i had to chop the rca's in oder to wire it up to my amp . if i sheild the wires where i cut it will it stop the static? what about amplifiers ?im using a oldschool punch on my mids which is only a 2 channel amp .if i use a updated 4 channel amp will the static lessen?

Jonathan o

I would use a SLOC (fixed level line output converter) a good quality one.

RTIS250

iTrader: (9)

Ive replaced just about my entire stereo system in my GS, while keeping the factory navigation head unit. I have new speakers, amps, wires, etc etc... And i have ZERO noise. Im willing to bet that the method the shop used to get your signals wasnt a good one.. and the power cable and rca cables are probably run close to each other. There is no reason a system should have noise, if it was installed properly and good quality materials are used.

olddog

iTrader: (2)

make sure the power cables running from the amp to the battery are not installed alongside the speaker and other wires. this creates engine noise.

dsa2402

Well it looks lke they are. At least they both come out on the same side of my trunk so I am assuming that they are runnong side by side. I am going to take it back to the shop today and ask them to fix it. I am hoping that they will do it for free because they made a mistake but they probably wont. Oh well. Hopefully it wont be too expensive. I hope that will fix my problem.