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Statis hiss on/0ff
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<blockquote data-quote="The Camry" data-source="post: 8511448" data-attributes="member: 657974"><p>Well ****. i was hoping this would go off without a hitch. Installed the third amp today. Now i have a loud static high frequency hiss when the car is on ACC but not started. When the key is turned to ACC is starts out loud and quickly goes down to a medium hiss. Then when i start the car, i get a loud crackle and the hiss goes down to simple back ground noise.</p><p></p><p>Im verified its the new amp doing this as changing RCAs, wiring location, proximity of RCA/Power wire, different dsp channels, and the like dont change anything. Pulling the fuse for the new amp instantly solves the issue.</p><p></p><p>So im obviously getting some kind of ground loop or the like. How do i address this?</p><p></p><p><img src="http://uploads.tapatalk-cdn.com/20160629/b48ca67f1d63976123d76452e2a91b10.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Silver amp is new amp. Left dist block is ground. Both orange fuses are the new amps fuses. Unfortunately I had to use the same colored wire for power/ground and thus its rather ugly to look at.</p><p></p><p>Ground/ power dist block wire is 2/0 welding ofc.</p><p></p><p>Power wires to sub and midbass amps are 4awg and power wire to tweet amp (new amp) is 6awg</p><p></p><p>Things ive tried.</p><p></p><p>Shorter ground. nothing</p><p></p><p>disconnected rcas, changes nothing.</p><p></p><p>remote wire directly to positive, just to check. no difference.</p><p></p><p>pulling fuses on MB/MR amp, i cant pull the fuse on the sub amp because my power to the dsp is on it.</p><p></p><p>Bench tested. Amp is fine.</p><p></p><p>Ran a different speaker wire to a external speaker from the tweeter amp(the one causing issues) noise is still there.</p><p></p><p>So its not the speaker wire grounding somewhere and its not the tweeters being sensitive.</p><p></p><p>Moving the amp. Moving the ground. Nothing helps</p><p></p><p>Its a high frequency issue because i can engage the LPF on the tweeter amp and it attenuates the noise.</p></blockquote><p></p>
[QUOTE="The Camry, post: 8511448, member: 657974"] Well ****. i was hoping this would go off without a hitch. Installed the third amp today. Now i have a loud static high frequency hiss when the car is on ACC but not started. When the key is turned to ACC is starts out loud and quickly goes down to a medium hiss. Then when i start the car, i get a loud crackle and the hiss goes down to simple back ground noise. Im verified its the new amp doing this as changing RCAs, wiring location, proximity of RCA/Power wire, different dsp channels, and the like dont change anything. Pulling the fuse for the new amp instantly solves the issue. So im obviously getting some kind of ground loop or the like. How do i address this? [IMG]http://uploads.tapatalk-cdn.com/20160629/b48ca67f1d63976123d76452e2a91b10.jpg[/IMG] Silver amp is new amp. Left dist block is ground. Both orange fuses are the new amps fuses. Unfortunately I had to use the same colored wire for power/ground and thus its rather ugly to look at. Ground/ power dist block wire is 2/0 welding ofc. Power wires to sub and midbass amps are 4awg and power wire to tweet amp (new amp) is 6awg Things ive tried. Shorter ground. nothing disconnected rcas, changes nothing. remote wire directly to positive, just to check. no difference. pulling fuses on MB/MR amp, i cant pull the fuse on the sub amp because my power to the dsp is on it. Bench tested. Amp is fine. Ran a different speaker wire to a external speaker from the tweeter amp(the one causing issues) noise is still there. So its not the speaker wire grounding somewhere and its not the tweeters being sensitive. Moving the amp. Moving the ground. Nothing helps Its a high frequency issue because i can engage the LPF on the tweeter amp and it attenuates the noise. [/QUOTE]
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