fordpride Posted November 3, 2015 Report Share Posted November 3, 2015 Hi guys! I'm new to the forum and need some help. Here's what I've got. I have a high pitch noise from the speaker when vol. on HU is at 1 it doesn't change with engine RPM's or HU vol. if I turn the vol. up I can't hear it anymore but it's driving me nuts. HU alpine 143bt Components RF prime series Subs RF r2d2-12 x2 Amps RF r500.1 subs RF R300.4 doors RF R150.2 kicks Mall wiring is sky high 0 gauge to mini bus bars 4 gauge to amps. My ground from the bus bar is going to the frame(37" long) 14 gauge to doors. Big 3 well 4 I have one ground going to the factor location and one to the frame Link to comment Share on other sites More sharing options...
fordpride Posted November 3, 2015 Author Report Share Posted November 3, 2015 Link to comment Share on other sites More sharing options...
Skullz Posted November 3, 2015 Report Share Posted November 3, 2015 Does it make the same noise with the engine running and shut off, or just running? Double and triple check all connections especially grounds. I like to bench test my amplifiers to make 100% certain they do not have an issue prior to installation. 01 Ford focus ZX3 Pioneer AVH-X491BHS PPI PC 4800.2 Morel Maximo 6.5" x2 Link to comment Share on other sites More sharing options...
fordpride Posted November 3, 2015 Author Report Share Posted November 3, 2015 Only when running Amp have been pulled and bench tested with no issues. I have also disconnected the speakers and connected a test speaker to the amps and the noise is still there. Hooked my iPhone directly to the amp with the same noise. Amps are daisy chained Truck is a 2012 RAM Link to comment Share on other sites More sharing options...
never knows best Posted November 3, 2015 Report Share Posted November 3, 2015 here is some useful info- http://www.termpro.com/asp/pubs.asp?ID=121 Link to comment Share on other sites More sharing options...
fordpride Posted November 3, 2015 Author Report Share Posted November 3, 2015 Can noise be introduced through the power wire ? Reason I ask is my wire follows the factory harness from under the hood, down the frame rail up through the floor Link to comment Share on other sites More sharing options...
SIDE SHOW Posted November 4, 2015 Report Share Posted November 4, 2015 Is it coming out of both front speakers or just one side? swap the rca's at the amp and see if the noise changes sides or stops Link to comment Share on other sites More sharing options...
fordpride Posted November 4, 2015 Author Report Share Posted November 4, 2015 It's coming out of all 4 components up front, rear fill speakers and subs Link to comment Share on other sites More sharing options...
fordpride Posted November 4, 2015 Author Report Share Posted November 4, 2015 If I turn my amps all the way down it goes away but once I move the gain pass 1/8 turn it comes back Link to comment Share on other sites More sharing options...
never knows best Posted November 4, 2015 Report Share Posted November 4, 2015 sounds like a noise floor issue. here is another link that will help- http://www.crutchfield.com/S-pfnl4dFNbqT/learn/learningcenter/car/amplifiers_noise.html Link to comment Share on other sites More sharing options...
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