Sub Help

[Pullenum]

ok I hace a rockford fosgate 900 watt amp running to 2 bazookas. I had my amp installed at circuit city, but the thing is when it was installed I had my factory head unit. Now I'm trying to install a sony mini disc head unit. its on, i got it working now, the thing is the subs only work when the Radio is on, as soon as i try to actually play the mini disc the subs cut off. Can someone please help me? oh, and if its any help the back of the headunit has a blue wire coming out dont know if that matters.

[96firebird311]

The thin blue wire is usually a remote turn-on lead for an amp. However, you said the subs play fine with the radio playing...correct? So that means that the amp is getting a turn-on signal from somewhere.

Does the headunit have an option to turn the sub RCA output on and off? I ask because my old Pioneer had that and it would reset everytime the battery was disconnected.

First thing, check to see if the amp is turning on when a CD is playing. Does the power LED light? Any other LEDs? Are you sure the subs are not playing AT ALL?

[Pullenum]

ok the Headunit doesnt have that option. and yeah works fine with the radio the amp gets power, but when i switch over to cd the amp turns off.

[96firebird311]

Hmmmm...provided all the features on the headunit are set correctly... sounds like a bad headunit. :( With everything playing fine while the radio is on, that tells you from the RCAs back to the subwoofers checks good. The amp remains on, so whatever the turn-on source is, is also good. That only means there is no audio traveling on the RCAs to the amp.

What is the model number of your headunit? I suggest reading the owners manual to triple check all features are set correctly. Check to make sure you're not using a LP crossover set at 10Hz or something. Also be sure to check all your fade settings. May have all different settings once you insert a CD, so be sure you're testing with CD in. My headunit now has that.

Maybe try installing a friend's headunit real quick. Just to see what happens. You still have the stock one also? Give it a shoot.

[nda0602v6]

Simple fix, you probably just used the wrong Remote Turn on. There are probably 2 (two) blue wires coming out the back of your mini-disc player, ones solid blue and the other is blue with a white stripe. There are two blue wires because one is to be used for a power antenna (which kills the power to this blue wire if you turn the radio off to switch to a cd or tape). The other blue wire will stay on no matter if you listen to the radio or a cd, it only turns off when you turn the entire unit off..........this is the wire you want hooked up to your amp.

[96firebird311]

Great guess nda, but he said the amp stays on while playing a CD...just no sound.

EDIT... damn it. I guess I'm totally blind. [img]redface.gif[/img]

[Pullenum]

ok so how and where do i hook up the blue wire and its one one blue wire its solid

[FireFighter]

Originally posted by nda0602v6:
Simple fix, you probably just used the wrong Remote Turn on. There are probably 2 (two) blue wires coming out the back of your mini-disc player, ones solid blue and the other is blue with a white stripe. There are two blue wires because one is to be used for a power antenna (which kills the power to this blue wire if you turn the radio off to switch to a cd or tape). The other blue wire will stay on no matter if you listen to the radio or a cd, it only turns off when you turn the entire unit off..........this is the wire you want hooked up to your amp.

Well done man. I hope that fixes the problem.