sohcrates

Allright, here's the deal.

I have the stock non-bose system in my 2002.

I tapped into remote turn-on for the stock amp, as well as postive and negative wires going to stock sub.

I ran pos. and neg. wires to a line converter.

I grounded both line converter and amp to a good ground under the back seat, and grabbed power from the power distribution block (a 4 gauge wire that runs directly from the battery to behind the fuse block)

When i turn radio on, amp turns on (LED lights up) but i get NO sound.

Line converter has adjustable pots, but running them through their whole range doesn't change a thing.

It's a stereo amp (xtant 202m) which i'm bridging to mono to drive a single JLAudio 15W0.

I'm pretty sure my wire taps are allright, but how could i test them? would hooking up a multimeter to them and setting it to record AC voltage at least show me if there's a signal?

What would be YOUR next step in troubleshooting?

I appreciate any help!


Pic 1: Subwoofer
<img src="http://pictureposter.audiworld.com/28628/sub1.jpg">

Pic 2: Amp (w/out sub wires connected yet)
<img src="http://pictureposter.audiworld.com/28628/amp1.jpg">

PsimonSez

Have you tried running the sub straight from the head unit? It could help rule out if it is a amp specific problem or not.

sohcrates

i don't have a way to run the amp straight from the head unit...i'm using the stock head unit, which is why i had to tap the stock amp and use a line converter

PsimonSez

So you are getting no sound at all? From any of your speakers? I was thinking that maybe there was a prob with the amp sending the signal to the woofer but if your other speakers are hooked up to the head unit and you still can't hear anything, then I am out of ideas. Sorry Sohcrates!

sohcrates

must have not been clear.

some people have suggested that i hook up my portable cd player to amp and see if it works..if so then i'll know if it's amp or wiring

i'll report back in a bit!

sohcrates

Plugged portable cd player in....amp and sub combo kicks out MUCHO bass...works great

Hooked multimeter up to output of line converter on AC Voltage...don't get a signal...so therefore is my problem.

The line converter i got from a Tweeter etc. and it has instructions which say to hook speaker wires (up to 55 watts) up to it, ground it, and then run RCA outs to your amplifier...so it HAS to be the right thing...no?

Sounds to me like my wire taps might not be good....but it's AWFUL to get back there and get at them!

Wonder how i can test them....

Oh yeah, and with portable cd player hooked up, and bass going, the trunk rattles like there's NO TOMORROW! What gives? i thought audi's might be built tighter than that! sounds like it's rattling right underneat the trunk...

old a4 pat

my audiolink ii said to NOT ground it. It said that only with certain amps would you need a ground. I do not know if that may be your case...but my converter is not grounded. I will check the wattage rating and get back to you.
Patrick

Raistlin

Make sure you have correct +- line levels(4 total)going to converter.

sohcrates

Thanks everyone.

I re-tapped the wires for +/- to the sub and now it works great!

(and i removed the ground from the line converter)

Thanks everyone!

QuattroRocket

Cheap convertors need an external ground. (No offense intended sohcrates)