Question about Audio Players & Recorders
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Posted on Jan 02, 2017
SOURCE: Alternator whine
Try purchasing a "ground loop isolater", when your head unit and amp are grounded in 2 diffrent locations the diffrence in volatage to ground between the two will cause interference. Check the below link for more details, can be purchased of a shelf at you local radioshack http://www.radioshack.com/product/index.jsp?productId=2062214&cp=&kw=ground loop&parentPage=search Hope this helps L8R
Posted on Sep 17, 2007
SOURCE: amp going into protect mode
If you set the gain too high on the AMP, at loud volume levels some clipping or distortion of the output signal will occur. Most amps have a Circuit inside that detects this clipping or distortion and applies protection to prevent damage to the speakers and the amp. It would help to know if you are driving the speakers with a Line level output or using the speaker output from your deck. There are many things that can cause an amp to go into protect mode, and knowing a little more about your setup will help to solve the problem.
Posted on Nov 09, 2007
SOURCE: RCA Whine, Newly Installed Amp
The shield ground is probably open in the head unit. You can check the shield ground by measuring the resistance from the shield of the RCA connector to the chassis of the head unit. It should be near 0 ohms. Disconnect all RCA cables from the head unit before testing.
If you find that the shield ground is indeed open, the following link has more information for a temporary fix.
Temporary Shield Ground Repair
Posted on Nov 18, 2007
SOURCE: Car audio amp or speakers bad?
If you know how to use a multimeter, you can test the amp this way:
-unhook the subs
-hook up a cheapie speaker you know for sure works to one of the channels
-unhook the audio inputs
-turn the amp on
-set your meter to VDC
-put the positive probe on the inside of the input connector, being sure you make contact with th inner contact
-take the negative probe and tap it on the outside of the connector
What you are doing is sending a low voltage (replicating an audio signal) into the amp audio circuit and allowing the amp to amplify it. If the amp makes the speaker pop each time you strike the probe, the amp is working.
There is an inherent problem with band passes. The naturally filter out high frequencies like a crossover, including distortion, so it makes it hard to hear when the subs begin to protest.
Posted on Nov 22, 2007
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