I have an infinity amp and an infinity 10 kappa sub.....

I had it all set up in the back just to see how it sounded and it was fine but recently I cleaned up the install and moved my amp under my seat.

Now after a 10 minute drive I get this loud hum noise and when I turn down the freq it goes away but when i turn that down the sub doesn't sound near as good as it did.

Any advice to why this is happening would be great. Thank you

 

I was thinking the ground from the amp, or do you have your power wire and RCA's away from one another? Hum!



John

 

Im not running RCAs im running the high level input but ya thats on the same side as the battery is that bad????

 

Always keep your signal separated from ALL power and ground wires and connections. Power circuits are the main source of signal noise, be it from bad shielding, too close proximity between signal and power, or ground loops.
It does sound like you may be experiencing either a loose input connection or signal noise from a nearby power or ground. HI level inputs are especially succeptable to signal noise due to poor shielding on the inputs.
Also, is the "hum" you are hearing, just a steady frequency or does it seem to change pitch up and down with the rpm of the engine? Often, an audible "hum" is really alternator whine, which is a sure sign of a ground loop. Check your ground connection for your amplifier and make sure it is secure. Also, whenever you ground any electronics, it is always a good idea to clean the grounding surface and remove any debris that might prevent a good solid connection. This includes removing paint! Lightly grind down at your grounding point to get the surface down to bare metal. This will ensure the best connection and will help to eliminate ground loops.

 

Ok i moved the wires to opposite sides..... So I'll see what changes it makes once i take it for a drive.

Another thing I getting is a hum from the auxially port but the hums continues even when i turn off my amp and IM pretty sure this is the alternator whine....how do i fix that

 

That hum is the result of a ground loop. Are you using an aftermarket HU or the stock HU? If you have switched to an aftermarket HU, you may need to check the ground of the HU. Many times, the stock radio's ground location is sub par and becomes problematic when more equipment is added to the stereo system. It is very possible that a secure ground for the HU will eliminate the audible hum from BOTH devices. The best ground point is one that connects to the frame itself with no obstruction from paint, dirt, grease, etc.. Ideally, all components of a stereo system should have one common ground. This is not always possible, but it is best to keep the ground connections to a bare minimum. It is also possible that the Aux port has its own ground. Grounding it at the same location as the HU should effectively eliminate that as a possible source of a ground loop.

 

Awesome man I will see what I can do. Thank you.

 

hey xb toast did it work?

 

ya havent heard it since.

 

hey good stuff. UV7 sounds like a car stereo installer ;-)