Hey guys. A couple of weeks ago I was driving to work listening to gansta tunes because I'm down with the hood like that. Anyway it sort of dawned on me that the sub had stopped (a few of my songs have periods in the song where the bass is absent, so I didn't think much of it until I got to the next song and found there was no vibrations). Anyway, ordered a Rockford Fosgate P3, which eventually came in today. Got it home tonight, wired it all up, and hit play and I got a medium to high bass thud as all my settings were set high (yeah, yeah). Panicked, pushed on the sub, and it still flexed (my first thought was the sub had frozen for some retarded reason). Cranked the settings down, started again, and it went off fine.

Fast forward to later tonight, decided to go for a drive and try it out, turned it up, getting nautious from the vibrations, and it dropped out again, checked and sure enough the amp was in alarm mode again.

So far I've reseated all the connections, went over the amp with the air compressor incase there was a loose wire fiber somewhere, changed the sub connections around on the amp, all still yielding the same eventual result.

Amp is a Option Audio OAK600, old sub was a OA street series slimline, new sub is a Rockford Fosgate P3.

What have I likely missed? My first thought is that I didn't connect it up right - the old sub had dual connections ( 2 pos, 2 neg on the side of the sub) and the new one only has 2.

Cheers guys.

My 2 minute research suggests the amp is reasonable quality and rated at 400W RMS @ 4 ohm or 600W RMS @ 2 ohm.

your old sub was probably a 2 ohm DVC, new one is either single VC in 4 ohm or 2ohm, both of which should be fine with the amp.

The amp has overheat protection - is it well enough ventilated? Maybe it's just overheating and tripping into safety, or maybe it's faulty and tripping early.
Just some ideas.

Is the amp hot when you touch it?

How high is the gain set? Turn it down and try again.

Also upon hunting around the RF website I cannot see a Rockford P3 12inch woofer that is only single voice coil......? Thats weird do you have a model number for it? I know you said you checked but you sure there is no second set of terminals???

I believe the amp was cool when it shut off. Will have a look soon (currently busy at work). Fairly sure there's only 2 terminals.

ED: all settings were zeroed, no gain, no boost etc

For anyone playing at home it looks like the OP may have been running a DVC woofer and it may only have been running of either one coil or running a 1ohm, we are working through it via pm now, but this shows how important it is to check impedance.