Apline MRP-M350 question.... or Issue lol

[mgweir21]

So I built the subwoofer box that is all over this site to replace the existing weak subs.... Used the Pioneer Sub TS-SW251 and the Alpine Amp MRP-M350

I have the amp all stuffed in the left side next to the exsisting amp etc. everything was working fine for 2 days, then one night about 1 am I was driving home and the sub stopped playing music....

This morning I look at all the fuses, connections, power light on amp, subwoofer connections etc. All check out ok

When I start up the car or give the amp power initially, the sub makes a pop noise (likes its about to hit for a song/note etc) then thats it, nothing else....

ANY IDEAS.... Is the amp dead or do you think it's the sub....

On the amp, I have the gain at half, been at half the whole time.

Thanks

Michael

[Essam Khafagi]

Michael, do you have sound from the rest of the speakers? Is it only the sub not working?

If yes, I suggest u check the connections one by one as follows:
- Cables going to the sub
- The tapping on the OEM amp plug (u should have four cables/connections to check)
- Speaker level input or RCA input going to the Alpine
- The remote power cable going to the Alpine
- The main power cable going to the Alpine
- and finally the ground.

Bad grounding can make no sound even if the amp is showing the ON blue light.

Good luck!

[mgweir21]

Ok, took it down to a local stereo shop and he hooked up an ohm meter and he says my Sub is only registering .5 ohms.... when it's a 4 ohm sub right? He is thinking the sub is blown. He thinks the alpine amp see's it's only .5 ohms and shutdowns.

Your thoughts?

[Essam Khafagi]

Then u should connect another sub and check if it works or not ... this is the simple way to know what's wrong