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Message: <blockquote data-quote="helotaxi" data-source="post: 1731613" data-attributes="member: 550915"><p>Check each section of wire and each connection for voltage drop.  If the amp is drawing 180A at full tilt (which actually does sound a bit high with music so the gains might be off) then 1/0 should give you about 1V of loss.  The fact that you are seeing lower than 12V with the engine running means that you are experiencing losses elsewhere, or your alt is not putting out the amperage that it should causing a voltage drop (this will also cause your amp to draw more current BTW).  Checking your gains won't hurt, but a DMM should be all you need.  You are looking for about 63V assuming that you have a D2 XXX wired to 4 ohms (no reason to wire it otherwise with that amp).  But I think you have a bad connection somewhere as well.</p></blockquote><p></p>

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