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Car Audio Help
Wiring, Electrical & Installation
New install, alternator noise :(
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<blockquote data-quote="rabidcrow" data-source="post: 7148153" data-attributes="member: 575882"><p>OK, so I've had my Pioneer DEH-P690UB running all six pre-amp outs to a four channel and two channel amplifiers. Everything worked awesome, no noise.</p><p></p><p>I recently picked up a 5-channel MA audio M1680I, and decided to move my Optima battery to the trunk during the install. I ran a lenghth of 4ga from the front to rear and hooked it up via a distrubution block to all postivies in the front of the car. I then grounded all negitive connections up front to a clean ground on the frame. The battery is grounded in the back via a 0ga cable right to the frame. The car starts, runs, and charges just fine.</p><p></p><p>I powered the new amp, both positive and negative right off the battery. I now get such bad popping, squeeling, and alternator noise that I can't even turn the amp on. I've tried different RCAs, grounding paths, grounding the rcas at the HU, no change.</p><p></p><p>If I power the HU directly off a 12v transformor, (one that plugs into the wall) and leave everything else the same, all noise is gone. Like, all of it. I tried powering the HU directly off the battery, and the noise was 5x worse //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif Is my HU fried or what? I know Pioneers can be touchy with the pico fuses on the board frying, but grounding the rca's at the HU ellimanates this right? What can I do to get clean power to the HU? Small cap in line or what? I need ideas... Thanks all</p></blockquote><p></p>
[QUOTE="rabidcrow, post: 7148153, member: 575882"] OK, so I've had my Pioneer DEH-P690UB running all six pre-amp outs to a four channel and two channel amplifiers. Everything worked awesome, no noise. I recently picked up a 5-channel MA audio M1680I, and decided to move my Optima battery to the trunk during the install. I ran a lenghth of 4ga from the front to rear and hooked it up via a distrubution block to all postivies in the front of the car. I then grounded all negitive connections up front to a clean ground on the frame. The battery is grounded in the back via a 0ga cable right to the frame. The car starts, runs, and charges just fine. I powered the new amp, both positive and negative right off the battery. I now get such bad popping, squeeling, and alternator noise that I can't even turn the amp on. I've tried different RCAs, grounding paths, grounding the rcas at the HU, no change. If I power the HU directly off a 12v transformor, (one that plugs into the wall) and leave everything else the same, all noise is gone. Like, all of it. I tried powering the HU directly off the battery, and the noise was 5x worse [IMG]//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif[/IMG] Is my HU fried or what? I know Pioneers can be touchy with the pico fuses on the board frying, but grounding the rca's at the HU ellimanates this right? What can I do to get clean power to the HU? Small cap in line or what? I need ideas... Thanks all [/QUOTE]
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New install, alternator noise :(
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