sub loses power when both coils hooked up
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=128762
Printed Date: May 12, 2025 at 2:48 AM
Topic: sub loses power when both coils hooked up
Posted By: tenchu
Subject: sub loses power when both coils hooked up
Date Posted: October 08, 2011 at 4:13 PM
I have a dual 2-ohm memphis mojo and a memphis pr 1.1000 amp, im 99% sure that I used to have it hooked up at 1 ohm, but now when I hook it up (according to the12volt diagram) it loses power (barely moves at all) and I also tried 4 ohm. the only way it "works" is with ONE voice coil hooked up, either one, just not both, what could be the issue here?
Replies:
Posted By: DYohn
Date Posted: October 08, 2011 at 5:11 PM
Polarity. ------------- Support the12volt.com
Posted By: tenchu
Date Posted: October 08, 2011 at 8:11 PM
Unless red is (-) and black is (+) :/ but i'll give it a try
Posted By: i am an idiot
Date Posted: October 08, 2011 at 8:20 PM
Switch the wires around on only one of the coils.
Posted By: blanx218
Date Posted: October 11, 2011 at 8:57 PM
Ive seen Memphis stuff in the past come with the terminals marked incorrectly. You can use a 12volt battery to check the correct polarity. connect each wire from the coils one at a time to the batteries + & - terminals. If the positive is correctly marked the sub will jump outwards when touched to the the positive of the battery. If it jumps inward, the polarity is incorrect
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