only sub plays when I use the aux

[Spike243 10+ year member]

I just installed a Sony GT250Mp head unit that powers all 4 car speakers. I also have 1 12" JL sub that is powered by a mono amp. Whenever I try to use the aux port on the deck only the sub plays?

Everything works fine when I use the radio. Any help is appreciated

Edit: This also happens when I play cds

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[Spike243 10+ year member]

Anyone?

 

[DukeNut 10+ year member]

Check the hu manual for settings. This is what I see in the manual you may need to look at.

Changing the sound settings:

Press the select button repeatedly

until “BAL,” “FAD” or “SUB” appears.

The item changes as follows:

LOW*

1 t MID*

1 t HI*

1 t

BAL (left-right) t FAD (front-rear) t

SUB (subwoofer volume)*

2 t AUX*

3

*1 When EQ3 is activated (page 10).

*2 When the audio output is set to “SUB-OUT”

(page 10).

“ATT” is displayed at the lowest setting, and can

be adjusted up to 21 steps.

*3 When AUX source is activated (page 11).Press the select button repeatedly

until “BAL,” “FAD” or “SUB” appears.

The item changes as follows:

LOW*

1 t MID*

1 t HI*

1 t

BAL (left-right) t FAD (front-rear) t

SUB (subwoofer volume)*

2 t AUX*

3

*1 When EQ3 is activated (page 10).

*2 When the audio output is set to “SUB-OUT”

(page 10).

“ATT” is displayed at the lowest setting, and can

be adjusted up to 21 steps.

*3 When AUX source is activated (page 11).

REAR/SUB*1

Switches the audio output: “REAR-OUT”

(power amplifier), “SUB-OUT” (subwoofer).

 

[Spike243 10+ year member]

Check the hu manual for settings. This is what I see in the manual you may need to look at.
Changing the sound settings:

Press the select button repeatedly

until “BAL,” “FAD” or “SUB” appears.

The item changes as follows:

LOW*

1 t MID*

1 t HI*

1 t

BAL (left-right) t FAD (front-rear) t

SUB (subwoofer volume)*

2 t AUX*

3

*1 When EQ3 is activated (page 10).

*2 When the audio output is set to “SUB-OUT”

(page 10).

“ATT” is displayed at the lowest setting, and can

be adjusted up to 21 steps.

*3 When AUX source is activated (page 11).Press the select button repeatedly

until “BAL,” “FAD” or “SUB” appears.

The item changes as follows:

LOW*

1 t MID*

1 t HI*

1 t

BAL (left-right) t FAD (front-rear) t

SUB (subwoofer volume)*

2 t AUX*

3

*1 When EQ3 is activated (page 10).

*2 When the audio output is set to “SUB-OUT”

(page 10).

“ATT” is displayed at the lowest setting, and can

be adjusted up to 21 steps.

*3 When AUX source is activated (page 11).

REAR/SUB*1

Switches the audio output: “REAR-OUT”

(power amplifier), “SUB-OUT” (subwoofer).

So what settings should I change?

 

[Spike243 10+ year member]

I found out what the problem was. I had to bypass the cars stock external amp and now the speakers play great