Need help, at wits end.

[Incognegro 10+ year member]

Ok need some help here’s the scenario:

System:

Pioneer 7500 HU

4 gauge all around

Diamond Audio CM12D4 subs (4 ohm dual vc, 500w rms.)

MA Audio HK1998

In 95 ford exploder

First off to preface the problem, the headunit is wired correctly, there are no blown fuses anywhere in the system(power, amp, etc.) all the connections are good, and all the wiring going TO the amp is correct(power, ground, remote turn on.

Problems:

The amp receives power(blue light is on) but also the blue protect light comes on too, and we have no audio. The subs are dvc 4 ohm, but are wired in 1 ohm parrell as given by the manual on the diamond site. The subs are wired correctly for this, and are connected to the amp properly. The rcas are plugged into the right channels as well. The amp will turn off if I unplug the rcas, turn the head unit off or shut the truck off. I cannot control the amp on/off through the headunit like I should. I have the filter set to low pass not full. My thoughts/questions:

In the amp manual where it shows how to wire the different loads for the different model amps that it covers, for my amp in mono mode it says 2 ohm minimum load, however I have been told that this amp is 1 ohm stable and can operate at that? Do I have the wrong amp?

Why can I not seem to flip the amp on/off from the headunit- the blue/white output on the back of the headunit is connected to the remote wire correctly and is hence connected to the amp.

I think that the amp (protect) is on because maybe there is a “short” in the system. Meaning that it understands the incoming power(its on isn’t it? Lol)but it doesn’t know how to put it out to the subs (hence the protect light?) and “protects” the subs Im assuming? Or the real question is did I fry them some how? But even if the wiring on the subs was wrong, wouldn’t the amp take the hit first and not pass it on? (meaning blow the fuses on the amp right?)

Before I wired it using the diagram in the diamond manual, I used the rf site and it came out different, and the subs didn’t work with that one either (2 subs, dvc, 4 ohms) I used the one ohm option I think on the rf site. 2 DVC subs at 4 ohms into 1 ohm load. Like I said this one didn’t work.

Really need help, been 3 whole days at this and still doesn’t work…ahhh

TIA

J

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[Incognegro 10+ year member]

bump for fustration.

J

 

[HowLowd 10+ year member]

isolate the problem. take a speaker that you know works IE Not blown and connect it to the amplifier. If it plays the amp is fine.

At this point connect a single subwoofer (do it in stereo 4 ohms) if it plays then that woofer is good. Do the same with the other. If they both play and the amp doesnt cut off the prob is in your wiring.

 

[fuzzai 10+ year member]

wire your subs up to 4ohms final load. see if it works

check your ground

get a light tester, and ground it to your amplifier ground, and touch your power wire, see if there is a short or not..

now, your deck, blue wire with white strip, is going to your amp. You can't turn off your amplifier from your deck can you? ive never been able to, even on my Alpine, i was albe to shut off the RCA's...im not familiar with your deck, so thats why i say this.

id check ground, and ohm load on amp.

also, when your amp goes into protect does it blow any fuses?

 

[RandyJ 10+ year member]

Wow, that was a tnagled web of mess for my starved mind. A short is a 0ohm spot in the cable which would lead to unrestricted current flow.

You cannot turn the amp on/off with the RCA's because they do not carry the 12V constant which turns the amp on (that should be a blue ~18awg REM wire)

 

[RandyJ 10+ year member]

And I sucessfully foprgot what else I was going to say //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Incognegro 10+ year member]

with the pioneer dehp7500mp you can turn the sub on/off. all i think that does is just cut the signal. the amp doesnt blow any fuses. I havent tryed wiring the subs in 4 ohm final load yet. dont really want to even thou thats what they should be cause then ill have garbage for power. time to get out the multimeter i guess. and dunno about the rcas. i know they dont carry current flow, but when i unplugged em w/ the amp /hu still on, the amp power and protect light faded out to off.

thanks guys. I shall:

wire for 4 ohm

test speaker individuall

dig up mulitmeter.

etc.

we shall see.

BUT SHOULDNT 1 OHM WORK? wtf

J

 

[Alpineinstaller 10+ year member]

no 1 ohm wont work if your amp says 2 ohm minimum load. And STOP unpluging your rcas while your shit is on, your gonna fvck something up.

 

[Incognegro 10+ year member]

Ok. I'll post a scan of the manual where it says that.

going to try the 4 ohm option and 1 speaker at a time fix this weekend.