I had one JL 500/1 and one Solobaric L5 in my car for a while then I added a second L5 and a second 500/1 today. I noticed that for some reason my new L5 seemed to be moving more air then my old L5. So I thought it was the amp maybe cause I added one I got off the interenet but it works fine. I checked all my wiring and its fine. I tried switching the subs to each amp and the subs make the same excursion with one amp but not my other amp.Does anyone know why this might be happening?

 

Check your gain levels and freq settings. Also maybe your RCA's are bad on the old amp. Try switching them around and seeing what happens.

 

It's either a wiring issue or the amp...not the sub. Time to weed out the problem:
(a) Which channel are you running the RCAs to? Maybe you are running one to the SUBWOOFER preout and the other to the REAR preout?
(b) Make sure that the amp settings are identical with respect to freq, gain (what kc said)
(c) If none of these are the problems, then take both amps out, open the cases, and inspect the internals. I know it's rare, and would hate it to be this, but some eBay scammers rip out the expensive internals of higher-end amps and swap them with cheapos, keeping the good internals in their old $hitty amp cases.

Good luck, man...let us know how you make out!

 

ok what gauge wire are you using for power/ground? where did you ground to ? Are you using a distribution block ? what size fuse holder are you using. answer those questions for me and ill gladly help. Do not open the jl amps and void your warranty they are great amps. It is a good idea but the amps are certainly not defective. It definatly has to do with the wiring to the amps for powre and ground i can guarentee it if he is not using 0/1 gauge wire the power is transfering back and forth so the current cant get to both the amps 1 amp is taking up all the current through the wire.

 

I'm using 4 gauge. I have an 80 agu and a 60 if I remember correctly.I've got one pair of RCAs running from my amp to the sub preout on my hu. I have another pair of RCA connecting one amp to the other. I'll try adjusting my input snsitivity. I'll check my RCAs.

 

OMG PLEASE CHANGE THAT GROUND. that is not a good ground at all Those 2 amps together youll need 0 gauge going into a distro block then splitting off into 4 gauge and u need a better ground. I used 0 gauge ground from my caps to the seat belt bolt your system will hit alot harder.... if you change that ground.

this is 0 gauge


these are the 2 amps im running along with 2 1 farad caps.

 

That's a weak ground man... definetley change that. I have my 500 watt grounded to the bottom bolt for my seatbelt. That's a good 5/8" bolt compared to that little 1/4 you're using. I'm only running 8 gauge wire... but I have a bigger grounding area.

Also, try using a Y connector instead of running off the amp for those RCA cables. Saves a headache when adjusting.

Also... I'm assuming that you bought the same model and make of amp. Each company runs different than each other.

But I think a rewiring is defintley in store. Get a distrubition block, find a different spot for that ground, and add a Y connector to your RCAs. That should even everything out.

 

Can you send me a pic of where you grounded it?

 

the seat belt bolt buckle. its like remove the bottom half of the seats it will be exposed. make sure you clean it good

 

There you go... I always try to use the seat belt bolt. Because I know for sure it's grounded. And it has one of the most surface area's to ground to. Using 4 ga wire does you no good if your grounding area is small.