Question about Sony XM-2002GTR Car Audio Amplifier

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Only one sub works

I have two pioneer champions.
4 ohms each.
Only one will be powered at a time using the 1st positive and negative on the amp.
The other positive works with the first negative. But not the 2nd negative its supposed to be using.

Basically the 2nd negative will not work.
So I have them both hooked up to the same negative.
And this causes the amp to do into protection mode.

Whats wrong?
Should I wire the subs at 2 ohms each?

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I have 2 subs and 2 amps both wired properly but one bose not seem to run how can i fix the problem please really stuck?

Posted on Mar 22, 2010

Fixed. That negative is not functional, but its not necessary to use it.
The subs were at 2 ohms each and that was causing the protective mode.
Rewired them at 4 ohms.
Works fine.
Separate positives, same negatives.

Thanks for the help.

Posted on Jul 02, 2008

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The amp should produce no output when using the left negative and the right positive.

If the amp works bridged (left positive and right negative) with one speaker AND works when you connect one speaker from the left positive to the right positive, it would appear as though the right channel isn't getting any signal.

Try inserting only the left signal cable (nothing plugged into the right RCA jack) to see if the right channel will work when a speaker is connected to the right channel speaker terminals.

Posted on Jul 02, 2008

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