Okay so I got my build done about 5-6 months ago and wired it up and have been running it at .4-.5 ohms with no issues. All of the sudden last Friday it just cut off, no smoke no obvious burn marks. Just went into protect and would not come back out.

I know that running it this low can cause issues and so I just went ahead and sent it off to db-r and they think i fried the drive board or the input.

My question is can anyone think of what may have caused this. Is it just because i was running it at the .4-.5 ohm load, or can it be something else that i can fix and prevent this from happening again.

My electrical is as followed.

Big 3 in 2/0

2 250 amp Mechman alts

2 runs of 2/0 + and - front to back

XS Power 5400 up front and 3 D3100 in the back

Voltage rests at 15.3 and will rarely drop below 14.2

Just checked all of my speaker connections and they were still tight, I ohmed them all out and I am reading 2.5 per sub. I have D4's and parelled them together. So I would have three wired together for a .83 load and the other 3 to a .83 load. and hooked one set each term to give me the .4-.5 load on the amp, if that makes sense.

I knwo this was alot of rambling, but just lookign to see if anyone has any opions.

It looks like a strong electrical system !

But .4 ohm ? Dam...

I'm not an expert, at all !

I hope you'll find your answers.

The actual DCR per coil is 3.5 ohms -- so each sub is 1.75 divided by six you have 0.29 ohms DCR.

A higher reading on a DMM is from the lead resistance of the meter itself.

As for the amp going out -- could simply be a fluke event -- Chris can tell you what happened.

Well i guess my math was a bit off, .29 is a little low. LOL

On the other hand this amp is a beast. It ran at that low ohm load for almost 6 months. Great product Jacob

When i get it back i think I will series then up to get a .6 load.

Also I will be adding a second 3500 and 2 additional 12's, what would you guys think would be the best way to wire them up.