I know this is super-old, but I came across this in my search tonight and I thought I would let everyone know that it's a Pro Sub 80, as I have one and had a need to identify it tonight. I ended up digging out the receipt from 2002 Who knows? Php Mysqli Extension Is Missing Windows Root here.

Could help someone down the road. Just helped me out over 1 year after this post! Thank you for following up!

The subwoofer. The ProSubs incorporate Definitive's proprietary PowerField® technology, by which the amplifier is specifically engineered in conjunction. The proper installation and setup procedures for your subwoofer. ProSub 800/1000. PowerField® Subwoofer with. Active Crossover & Power Amplifier. Owner's Manual.

-- EDIT -- I believe the series is actually ProSub 800 and ProSub 1000, per DI's legacy document section found. I purchased two in 2001.

Redsail Cutting Plotter Usb Driver For Windows 7 on this page. Just blew the dust off them a few days ago while 'discovering' some things in storage!