Now that im selling it i finally snapped a pic lol ,never did test it at 1 ohm tho just one of those mysteries i guess.

You can see it says 1 ohm stable on the side....

 

I think it would be easy just to open it up and read the model # off the PCB.

 

It means it won't hurt it at 1 ohm, but you won't get any more power than at 2 ohm, because the power supply is maxed out. It's overcurrent protected, so, you can try to draw more power from it, but it won't let you.

 

ahhhhh ok, that makes sense.