JL Audio Amp Help

[recklessspyder]

Hello all,

I bought a setup from a fellow user and need a few pointers complete my setup with a JL 1200a amp and stealthbox sub.

I followed BSW PDF/Video on their install and have the 1200a instructions as well along with the previous users cables (and extras).

I wired the whole thing to completion and found that when I have the RCA's plugged into the amp (L and R) the sub output is diminished....when I only have one plugged in (either one) it sounds so much better.

BSW's PDF says that I might have a + - switched up but I rechecked and think I'm good.

The only issue that I can thin of would be the cables. I have spliced RCA cables which I don't think he used....instead he made his own RCA with speaker wire. Again, I don't think the positive/negatives are messed up as I checked his custom connections as well.

Oh...I've spliced for connections at the connection at the amp (non-dsp)

Let me know what you guys think

Thanks

[Essam Khafagi]

Usually this is caused by reversing the positive and negative speaker wires ... if you are sure that you have connected them correctly then I would suggest an RCA to speaker wire ready made adaptor (instead of splicing)

[recklessspyder]

That seems to be the issue. I did go out and buy some RCA's with live ends from Radio Shack but before I install those...maybe not needed any more. I spliced one of the connections to the amp and cross the wires. Fired right up with more power than just a single connection. I guess I'll have to decide whether or not I want to rewire the mess again or leave the hack job I originally did.

Thanks, Essam, I've read many of your posts for help, you're a great contributer

I'll also reach out to others who have this set up for their settings as well....for the best sound. I hate 'huge' bass that draws attention...I just want to capture lows to make the music more lively.

[Essam Khafagi]

glad that ur issue is solved

[rimanivong]

I had the same issue with many of vehicles. What I done to fix that! I got a RCA converter that came with a grounding cable. I dont have the make and model but if interested I can get the info for you.