Amp not getting proper signal?

[countrydude]

First off, I'm totally new here and my apologies if this question has been answered already. I have no idea what to search for or what category it might be in.

Here is what I'm working with; installing an amp and sub with a factory head unit. I spliced in a line out converter, wired up the amp, and connected the sub. The problem is it seems like the amp gets little to no signal when the balance is set to zero (centered) on the head unit. If I fade it left or right a few ticks I start getting some action from the sub. And the farther I fade it, the more signal it gets.

I've checked all connections, checked the setting on the amp, and fiddled with the adjustment dials on the LOC. My only thought is the LOC is used from a local car audio store and might be faulty?

What am I missing here?

Thanks

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[hispls 5,000+ posts]

One side is out of phase.

 

[countrydude]

Okay, that makes sense but what do I do about it? Is that a problem with the head unit?

 

[DaveT 10+ year member]

Just flip the polarity of your speaker wires on the ones out of phase, easy peezy.

 

[countrydude]

How do I figure out which one is out of phase? Does it matter? Can I just switch one arbitrarily?

 

[countrydude]

Tried switching one set of the speaker wires and that didn't fix it. Any other suggestions?

 

[staan]

they meant flip one of the loc input signal wires i hope

 

[countrydude]

Right, that is what I did... Should have been more clear.

 

[THATpurpleKUSH 5,000+ posts]

Can you take a picture of your amp showing the how the controls are set?