Wow, PA tech support is awesome. Got this reply back within an hour of sending it out.
"The TS980-2 amplifier is 2 ohms stable in stereo mode and 4 ohm in bridged mode. If the woofer power rating is between 500 to 700wattts rms and can be wire at 4 ohm, then the amplifier will have no problem playing the woofer."
lol power acoussssstik? LOL! if you getting power acoustik ima trade my memphis and get a audiobahn amp......no ,no ,no roadgear from walmart...yea thats the one!
nothing wrong power acoustik, don't mind mr type r freak from "da dirty souf".. that amp will not work well with a dual 4ohm sub because if you bridge the power to it, it will be a 2ohm load which your amp is not 2ohm stable mono... i have run that amp at 2ohms daily before for quite some time.... gets ungodly hot but never quit on me... you can try it, but i wouldn't advise it...