My friend and I just recently installed my IDMAX v.3 and JBL 1200.1 watt amp for me. I left my stock Bose head unit in for this install. However the signal we were getting seems very weak. The sub is hooked up to recieving full power and it is not even close to hitting as hard as it should be. Right now we are using a l.o.c. that is spliced into both the rear speakers. I was thinking about getting an line driver to help with this signal, but I went up to a local M.A.S. store and the guy told me that he didn't think that would make a difference. Also i heard that maybe if I splice into the wires to get a signal before the stock amp, the signal would be much stronger, but after finishing the install doing that would be a pain. If anyone could tell me any suggestions that will improve the signal ouput, it would be appreciated. Thanks.

 

You def need a line driver if level is your problem. Did you try turning up your head unit to see if it would pound harder? That guy is a moron, how can it not make a difference?

 

Yea I tuned it up a lot, it hits pretty hard just not at the power it should be. I have it hooked up to the full 1200 watts and its not even hitting as if it was getting 600. Also the weak signal I think is causing the sub to not hit as crisp as it should. This is really shown when you turn the volume quickly up or down. The sub will hit as if it was at the previous level before it eventually reaches the new level. But if a line driver will drastically help thats what im looking for.

 

at what ohm are your running your sub?

 

we are running the sub at a 4 ohm load

 

are they dual 2ohm subs?

at 4ohms, that amp is about 600watts.
it would be alot better to wire that speaker to 1ohm and tunr the gain down abit. the jbl1200.2d is 1ohm stable mono.

 

yeah the sub is dual 2 ohm

 

Steve,

I was looking up your amp on the web and not sure if this the JBL BP1200.1 is the same one your using. If so it has 2 speaker out connections. It has 4 inputs for non-fading bass. Are you using both speaker out connections from the amp? If so then your only going to get signal to once part of your speaker the other isn't going to get much signal. If you are only using one set of inputs and outputs then it could be that your output is from wrong side of inputs. Depending on how the amp is using the input source signal you would only be getting half the signal to the speaker.

You could jumper the inputs from your factory speakers to both front and rear inputs on the amp keeping the right and lefts same. This would fake the amp out thinking you had it hooked up to a 4 speaker system and give your amp the signal it is looking for.

hope this helps