Question/Help

[TRiCK 10+ year member]

Ok, quick background information.

I have 2 12" Alpine Type R's (4ohm) hooked up to an Alpine MRP1000 amp.

I have it so that both voice coils on each sub are on, but still come out to 2 ohms so that the amp is still doign 1000 @ 2 ohms.

Today I was driving and the bass turned off randomly, but came in and out every 30 seconds or so, then after 5 minutes, went off completely.

I turn my car on, the amp turns on. The light on the amp is lit up.

I hooked up my subs to a friends car, and they still work.

Although my fuse under the hood looked fine, I replaced it.

I checked all the 25 amp fuses in the amp, they are fine.

I checked to make sure all wires are plugged in. Both amp and deck.

I'm stuck now, I have no idea what to do.

Is my amp fried? Although the light comes on.

Click to read more...

 

[tylork92 10+ year member]

i would check ground and RCAs...sound maybe a ground came loose or your RCAs came out.

 

[TRiCK 10+ year member]

i would check ground and RCAs...sound maybe a ground came loose or your RCAs came out.

Well if the ground came loose, the amp wouldnt turn on, would it?

I did check the RCA's as well.

 

[tylork92 10+ year member]

is it a GOOD ground?...

 

[TRiCK 10+ year member]

is it a GOOD ground?...

4awg, attached to a sanded piece of metal.

I havent checked it, but I was asking, wouldnt the amp NOT turn on if the ground wasnt connected?

I mean, the amp has to have a + and a - to turn on.

Tell me if I'm wrong please, I just want this fixed.

 

[Bassman999 10+ year member]

are your subs dual 4 ohms each or single?

 

[Stalin-ohaulic]

^ you are thinking the same thing as me. Alpine only makes type r's in dvc I believe. This means that they CANNOT be wired to 2 ohm. They can only be 4 ohm or 1 ohm. He simply has them wired in parallel down to 1 ohm and his amp is going into protect. Don't turn it up as loud or turn the gain down.

 

[Bassman999 10+ year member]

^ you are thinking the same thing as me. Alpine only makes type r's in dvc I believe. This means that they CANNOT be wired to 2 ohm. They can only be 4 ohm or 1 ohm. He simply has them wired in parallel down to 1 ohm and his amp is going into protect. Don't turn it up as loud or turn the gain down.

yeah I figure he had it wired to 1 ohm and it would keep turning off on based on how hard it was pushed. Alpines will do that. It had enough and failed.

 

[TRiCK 10+ year member]

So you're saying the amp is fried..?

I was almost sure that they were set up @ 2 ohms.

 

[aviator08 10+ year member]

well how did you wire the the subs? because there is no way you get a 2ohms from 2 dvc 4ohm subs

 

[TRiCK 10+ year member]

I prolly did wire at 1 ohm thinking it was 2 ohms.

Now that I think about it, when I did turn it up too loud it'd go into protection mode.

 

[aviator08 10+ year member]

Yup probably, I looked up your amp and not 1ohm stable so check your wiring, rockfords website will help you out on the wiring.

 

[TRiCK 10+ year member]

Yea well the amp is fried.

Here are my choices.

Either send it in and pay $70 + shipping to get it repaired or maybe buy a nice used amp, like the Memphis st1000d thats for sale in the classifieds for $150 shipped.