Local ad for a Def Tech sub lists it as a 700W sub, these dimensions 10 1/2 H x 9 3/4 W x 15 1/5 D. Asked her for the model number off the back, but she says there isn't one. I also asked her to send a better picture of the back - when I get it I'll post it.
I looked on def techs site, and checked owners manuals, and couldn't find a 700W sub.
It could be one of their older Powerfield-series subs, which came in a variety of sizes (10", 12", 15" and 18"). That looks like one of the smaller subs - maybe the 8"? - so it's unlikely that the amp actually pushes 700 watts RMS.
-- Edit --
FWIW, although the cabinet measurements are a bit off, the back panel looks very much like the panel on the ProSub 60 (PDF), which has a 150W RMS amp and an 8" driver.
looks identical to my current Def Tech ProSub100 which is discontinued(purchased in 04) my sub also has no info or model number on the back. Not home to measure dimensions though, so I guess it could be any size
Here is the larger picture she just sent me. It does say 700 Watts down on the lower left right above the power cord. I'm looking for a second sub to add to my Mythos set up (1's in front, 4's rear/Center, and M&K MX-250 sub). Its probably worth the 100 bucks she's asking, but not sure its going to keep me "happy".....
ps. Looking at the dimensions given, its got to a an 8" driver in there (based on the 9 3/4" dimension...)
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