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<blockquote data-quote="Jonas84" data-source="post: 8896463" data-attributes="member: 687280">Head unit is oem ccc for bmw e61Lci and is working in all ways, signal i cant say, my oscilloscope will arrive next week. But as said, it sounds like bad signal.. Distortion even on low for the speakers connected to the HU. No LOC, since this is hifi 676 option it has low ground to the oem amp in back, which i discarded and now run a amp for the subs with 4 gauges wires. That then sends signal to next amp with 0 gauge wires to the 12&quot; subs. Battery is brand new 105ah 950cc agm varta, and i dont believe power is the culprite, it chargs and maintain voltage, and i said. Doesnt matter if i disconnect the amps power/signal. It became like this after i used 0db test tone to set subs, atleast i believe.And since i put in new door speakers today and the still sound crap. Im sure its not that. I use firefly ldac as bluetooth source, tried settings in spotify, android, oem hud. Doesnt matter if i take away bass&quot;makes less noticable do&quot; or change eq settings. So im thinking about buying vibe powerbox dsp to run doors and rca signal to amps. Any thougts?</blockquote>

[QUOTE="Jonas84, post: 8896463, member: 687280"] Head unit is oem ccc for bmw e61Lci and is working in all ways, signal i cant say, my oscilloscope will arrive next week. But as said, it sounds like bad signal.. Distortion even on low for the speakers connected to the HU. No LOC, since this is hifi 676 option it has low ground to the oem amp in back, which i discarded and now run a amp for the subs with 4 gauges wires. That then sends signal to next amp with 0 gauge wires to the 12" subs. Battery is brand new 105ah 950cc agm varta, and i dont believe power is the culprite, it chargs and maintain voltage, and i said. Doesnt matter if i disconnect the amps power/signal. It became like this after i used 0db test tone to set subs, atleast i believe. And since i put in new door speakers today and the still sound crap. Im sure its not that. I use firefly ldac as bluetooth source, tried settings in spotify, android, oem hud. Doesnt matter if i take away bass"makes less noticable do" or change eq settings. So im thinking about buying vibe powerbox dsp to run doors and rca signal to amps. Any thougts? [/QUOTE]

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