LOC - subwoofers????

[turbo lcc]

My buddy is trying to add an amp and subwoofers to his 05 RAM stock system(infinity NAV 6CD changer) we are having trouble with the LOC. We have it wired into the 2 reat speakers and we are not getting any output from the Alpine 605 mono amp. Any ideas?

 

[JMingledorff]

I've always used an RCA converter to wire an amp into the stock system. It wires into the speaker wiring.

 

[ohnoitsyu]

An LOC (Line Output Converter) is what converts speaker-level signal to RCA level signal.



Are you sure the amp is on? Do you have another signal source you can run into it for testing purposes? A portable audio device, such as an ipod or CD player works great, using a 1/8" mini jack to RCA adapter. This will help you determine if it's a signal problem or amplifier/speaker problem.

 

[turbo lcc]

I thought is was the amp at first so I took it to a local car audio shop and had it bench tested. It tested fine. I will give the walkman idea a shot. I am 90% sure at this point it is the signal. . We tried 2 different LOC. Thanks for the ideas.

 

[goose1029]

you wire in an amp turn on lead? or does your amp have auto sensing? the amp neads a signal to turn itself on . usually its a blue wire on the radio harness.

 

[turbo lcc]

The amp has a remote wire. The amp is coming on and working as far as I can tell. It seem to be a signal issue. Does anyone know if the rear speakers have some type of filter that removes the lower BASS freq?

 

[ohnoitsyu]

The amp has a remote wire. The amp is coming on and working as far as I can tell. It seem to be a signal issue. Does anyone know if the rear speakers have some type of filter that removes the lower BASS freq?

I'd say that's very likely. Since there are frequency filters in the Infinity amp, and the rear door speakers are too small to handle low frequencies, it's qute possible that you could be getting signal, but it's all ready filtered. Try running the amp full range (no crossover) and see if you get signal.



Again, the walkman test (or any known-good signal) is the first test any competent shop would do for testing the system. It will tell you a lot more than a bench test will.

 

[AdamJohnson]

Where in the system did you tap the rear channels, before or after the infinity amplifier. The reason I ask is I have tapped before the amp and I did get a signal but I had no volume control. When you turned the volume down on the head unit the sub volume did not reduce. This was weird I have never seen this before. I made the assumption that the Dodge somehow has ran the volume thru the infinity amplifier so the rear channel wires off the head unit are full signal all the time, no volume control until after the amp. I never got around to try tapping the rear channel wires after the amp.



After you had everything hooked up did you adjust the gain on the amp to see if you actually had a signal.

 

[DF5152]

the srt truck come with a sub built into the infinity system check a friendly dealer and see where they pick up the signal

 

[ohnoitsyu]

The SRT's signal comes directly from the amplifier. The signal wires are in the speaker wire harness. I've been contemplating on going directly to the unused terminals on the amplifier (the ones use for sub signal on the SRT), and checking to see if there is a sub signal there. Review the wiring schematic at the Dodge bodybuilder website, and you'll see what I mean.

 

[turbo lcc]

I tapped into the rear speakers in side the posts by the floor boards. . ( after the factory amp)

 

[turbo lcc]

The SRT's signal comes directly from the amplifier. The signal wires are in the speaker wire harness. I've been contemplating on going directly to the unused terminals on the amplifier (the ones use for sub signal on the SRT), and checking to see if there is a sub signal there. Review the wiring schematic at the Dodge bodybuilder website, and you'll see what I mean.

Do you have a link?

 

[turbo lcc]

Where in the system did you tap the rear channels, before or after the infinity amplifier. The reason I ask is I have tapped before the amp and I did get a signal but I had no volume control. When you turned the volume down on the head unit the sub volume did not reduce. This was weird I have never seen this before. I made the assumption that the Dodge somehow has ran the volume thru the infinity amplifier so the rear channel wires off the head unit are full signal all the time, no volume control until after the amp. I never got around to try tapping the rear channel wires after the amp.



After you had everything hooked up did you adjust the gain on the amp to see if you actually had a signal.

Yes. . nothing was coming from the AMP.

 

[ohnoitsyu]

Do you have a link?

Yes, go here: http://www.dodge.com/bodybuilder/

 

[turbo lcc]

Found the answer!!!

We found the answer. It seems that the rear door speakers on the truck had no BASS. Once we tapped the front 6x9s it started working like a charm

 

[ilovetrains]

so where is the factory amp on an 05 with the infinity system? The reason I ask is that I was told each individual speaker had an amp attached to the speaker basket.

 

[turbo lcc]

Not sure but I think behind the glove box. We tapped into the wires by the floor boards so we could hide the wires.

 

[ohnoitsyu]

so where is the factory amp on an 05 with the infinity system? The reason I ask is that I was told each individual speaker had an amp attached to the speaker basket.

On the 06, the amp is behind the glove box right behind the front passenger's airbag - a real PIA to get to. Even the connectors are difficult to access. I don't remember, but I think I have to remove the SRS unit in order to remove the amp. The 05 may be similar.

 

[cwbyinjeep]

http://mobile.jlaudio.com/products_cleansweep_pages.php?page_id=79



I just installed one of these bad boys last month under the factory radio and behind the dash panel in my Laramie. It took a factory speaker signals and turned them into a very clean sounds about as good as any aftermarket tuner with preamp outputs short of competition grade. It's working like a champ and the comparison in sound quality from the JL Cleansweep to a standard line output converter isnt even a comparison IMHO