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<blockquote data-quote="gev003" data-source="post: 5422821" data-attributes="member: 604224">OK,I went to Radio Shack and got a DMM, started the car and it was reading 14.2 V at the amp, I then turned the volume up on the headunit, still hardly any output from the sub because the gains are set so low (less than halfway and the Kenwood headunit supposedly has 2 volt preouts), the meter still showed 14.2 and then the amp shut down.&nbsp; No drop in voltage that I could see, but then again the gains are turned down so far that the sub was nearly inaudible.&nbsp; I don&#039;t understand.&nbsp; I checked the sub last night, did the 9v battery test with both voicecoils after taking the sub out of the box and they both popped quietly, then I ran the coils in parallel and did the test again, again a little pop.&nbsp; It makes me think that there is possibly a problem with the signal line, either at the HU, in the RCA cable, or at the amp.&nbsp; Is there anything else I can use the DMM for to test this?&nbsp; I tried to test the ohms at the speaker terminal but it was giving me wierd readings.&nbsp; Any ideas?</blockquote>

[QUOTE="gev003, post: 5422821, member: 604224"] OK, I went to Radio Shack and got a DMM, started the car and it was reading 14.2 V at the amp, I then turned the volume up on the headunit, still hardly any output from the sub because the gains are set so low (less than halfway and the Kenwood headunit supposedly has 2 volt preouts), the meter still showed 14.2 and then the amp shut down. No drop in voltage that I could see, but then again the gains are turned down so far that the sub was nearly inaudible. I don't understand. I checked the sub last night, did the 9v battery test with both voicecoils after taking the sub out of the box and they both popped quietly, then I ran the coils in parallel and did the test again, again a little pop. It makes me think that there is possibly a problem with the signal line, either at the HU, in the RCA cable, or at the amp. Is there anything else I can use the DMM for to test this? I tried to test the ohms at the speaker terminal but it was giving me wierd readings. Any ideas? [/QUOTE]

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