Setting Gain with Multimeter Problems

[Hybrid13 10+ year member]

I have the stock radio that came with my 2011 Silverado. It's the one with Nav, backup cam, had the Bose system but I bypassed that. Turned the treble and mids to middle(flat) and bass up. When I tested it I had the frequency at 60hz on the amp. Haven't had time to try on 240hz but other than that everything was set like you said to.

 

[csu87 10+ year member]

which loc are you running? some of them have switches on them to vary output voltage.

sounds like either your not getting a good input signal to your amp, or something on the amp is messed up (settings or internals)

you can always rule one out by plugging your phone/mp3 player directly into the amp and going from there

 

[csu87 10+ year member]

I think your problem lies within that a car only outputs 12-14.4v on average.

and also, don't listen to this guy, he has no idea what you are trying to do

 

[csu87 10+ year member]

dbl ftl

 

[Hybrid13 10+ year member]

I don't think it is the amp because my 4 channel amp has the same problem. So you're saying just get a headphone jack to RCA cable and hook my phone to it? If I do that and I get the right voltage what should I do about the signal from my head unit?

 

[csu87 10+ year member]

Yes try that and see if it works.

If it does, check your LOC wiring and make sure you did that correctly

 

[Hybrid13 10+ year member]

Loc?

 

[csu87 10+ year member]

how did you hook up your amps to your stock headunit?

an LOC (Line Output Converter) is what you use to get a signal from your stock radio to your amps

 

[Hybrid13 10+ year member]

Well I have read that the stock Bose radio only puts out low level RCA output because stock they go straight to a Bose amp. But other people have said that it is not low level it is in fact high level speaker output. I really don't know how to tell. But my amp takes either through the RCA input. It came with an adapter to adapt your HU output to RCA. Hope you under stand what I mean.

 

[csu87 10+ year member]

So the adapter took your speaker wiring out of your headunit and converted it to a rca? That is an LOC

If both your amps are doing it, I'd check the wiring at the adapter and the head unit

 

[Hybrid13 10+ year member]

No it's not a converter. It's just two RCA cables that is bare wire on the other end., picture an RCA cable then cut one end off and wire your speaker output to it You know most amps have desperate input for high level, well my amp can take high or low level trough the RCA jacks. I know what a LOC is, I have them in my car. I just didn't know they were called an LOC.

 

[csu87 10+ year member]

yeah not sure thats how it works. I could be wrong, but that definitely doesnt sound right

 

[Hybrid13 10+ year member]

Yeah, I posted the link to my amp with my original post. If you read the features of it it says it there.

 

[brian84corvette 10+ year member]

i wana see a picture of whats happening between your headunit and the amp.

a quick drawing in pencil will do - but label each piece so we can see how its hooked up... it sounds like something is .... missing i think

 

[big scott]

i just looked up that amp and i know how you got it.

its a rca cable with 1 end cut off. the cutoff end connects to the speaker output of the radio. the other end of the rca goes into the amp.

so its a loc/rca cable. but its not a loc if that makes cents.

Pioneer GM-D8601 Mono subwoofer amplifier — 800 watts RMS at 1 ohm at Crutchfield.com

look at the manual on this page.