Oh, the headunit I'm using is a kenwood excelon x679. The preamp out's are 5 volts, not sure if this info is needed also.

 

alright -- let me help you out.

first -- let's do some troubleshooting to locate where your problem comes from.

does the whine change w/ engine RPM?

disconnect the RCA's from the amp. is the whine still there?

what are you using to connect your ground to the car? are you using a ring terminal or just bare wire under the bolt? (yes, i know - you are using the factory ground point.)

answer me these questions 3, then we can work forward.

 

I believe that its coming from the engine, since the noise gets louder as I accerlate. So yes, it changes with the rpm.

The noise stops as soon as i disconnect the rca's, but now I'm getting a even worst noise, and my speakers sounds a bit distorted. It would just be the regular noise for a while, then after driving for a bit I would get a really loud high pitch noise thats really unbareable.

The ground I'm using a gold plated ring terminal thing that came with the amp kit I bought.

I don't know whats going on with that loud noise now, did something burn out or is something malfunctioning? I'm going to try hooking up a different amp later to see if my amp is burned out. Thx for any help pjk, I'm getting rather desperate.

 

make sure the speaker wires themselves are fine... check them all. If you had a little bare wire, or a loose conection. maybe even if you have them backwards.

 

.Ajkweler,

You need to isolate the noise problem by steps. You can go start from Alternator all the way to speakers, or you can go backward from speakers back to Alternator. Since you have stock speakers on hand, why not use it to test ?

With engine "off", key at position "0" turn down the gain control on your amp to minimum, turn down the volume on your HU to minimum, now turn you key to position "I" or "II", do not start engine, turn on stereo and slowly turn up the volume until you hear music, keep turn up the volume to about half way between minimum and maximum. Do you any noise ? If no noise (1a), keep the volume setting at that position, slowly turn up the gain on your amp to half way, do you hear the same noise level ? If no noise (2a), turn off the HU, start engine, turn on the HU, if the noise now audible, then the noise comes from your alternator, you will need to buy alternator noise suppression for about $10.

(1b) If there is noise coming from both of your speakers, disconnect your speaker wire at the amp after turn off your stereo, connect your stock speakers that you had before you replace with the new one, with another speaker wires, do you hear noise ? If yes, your new speakers are good, your noise come from amp or HU or wires or cable or power line or ground. If no noise, then your new crossover and/or new speaker are bad. Disconnect your stock speakers from the amp, reconnect new speaker wires to the amp, disconnect new speakers from the crossover, reconnect stock speakers to crossover, listen for noise, if no noise, then the new speakers are bad, if you hear the same noise, then the crossovers are bad. In this step, you are using your stock speakers as a test tool.

(2b) If you hear the same noise level at this step, then you amp is the source of noise.

Do you want to try these to see if you can isolate the problem ?

 

A "car" forum is rarely the right place to seek audio advice, but I'm glad to see some replies have steered you to the right path.

Google for autosound 2000 alternator whine troubleshooting will yeild many hits.. including these:

http://216.239.39.104/search?q=cache:lB7HI...&hl=en&ie=UTF-8

http://216.239.39.104/search?q=cache:wUHxZ...&hl=en&ie=UTF-8]www.carsound.com/columns/navone/nav0013.shtml+autosound+2000+alternator+whine+trou bleshooting&hl=en&ie=UTF-8]http://216.239.39.104/search?q=cache:wUHxZ...&hl=en&ie=UTF-8[/url]

Follow the steps until you find the culprit. The idea is to change only one thing at a time so that when the noise stops, you know what the problem is.

As for the run your RCA's and power wires here, there, but not there!!!

/can't remember the last system I had whine in

 

Thx for all the replies guys, I'll try those steps tomorrow when the neighbors aren't sleeping. Hopefully I'll get this resolved soon. Once again thx for all the help and I'll let you guys know how it goes as soon as I get to tinker with it.

 

Quick question, if my receiver has 5 volts pre-out rca's and my amp has a input senstivity of 0.5-4volts, which this cause harm to the amp? I've been running with the noise for about 2 days and now the amp is in protect mode. I looked at the manual and it said that it either overheated, has input overload, or a short circuit. So does anyone know whats going on, or do I just simply have the worst luck ever with car audio =/

 

TR-S2k has some good points... we want to work on this one step at a time... you can follow his guide if you'd like, but i'll still try to work w/ you on this as best as i know.

[QUOTE]I believe that its coming from the engine, since the noise gets louder as I accerlate. So yes, it changes with the rpm.

The noise stops as soon as i disconnect the rca's, but now I'm getting a even worst noise, and my speakers sounds a bit distorted. It would just be the regular noise for a while, then after driving for a bit I would get a really loud high pitch noise thats really unbareable.

 

PJK3

1: the noise does seem to stop when i disconnect the rca's

2: I'm tryin to find a place to ground it rather then the harness ground.

3: The amp is in protect mode all the time now, and I can't seem to get it out of protect mode. I had the gain on about half way, the low filter was down and highs were about half. I also engaged the highpass on the amp itself.

4: sadly I don't own a multi-meter, but with all of this I'm going to get one soon as I have time to pass by home depot or something.