Velodyne DD15 - worth repairing the plate amp?

erik_squires: only ship the very light (Class D) plate amp, 5 lb or so. 

musicaddict "take over the DD-15" based on quality INCLUDING price? Even the 12" SB-2000 (used they start around $750 or same 'value' as I assign to my repaird DD-15). 

other commenors: value/budget for decision making: $800 ($500 repair + $300 residual value). 13" SB-3000 start at $900 used. The 13.5" SV4000 starts $1,500

Also: ideally needs to move some air if I want to use in main system (VERY large volume room (3 story room, open to hallway, dining, foyer, hallway, kitchen), like my current Dayton UM18-22 18". Not sure if tiny 12" or 13" (SB-2000, SB-3000) have enough stroke, or they would be relegated to the normal room 2nd system. 

jasonbourne71 what to get 'more recent' that is better for under $800 (repaired value of DD-15)?

IMHO get NOTHING more recent and keep repairing your old one.

Getting new is taking too much chance on reliability while overhauling old one will give another life and keep going.

You can replace the plate amp yourself. Try google for a compatible replacement. I would imagine this would save you a few dollars.

I had the amp from my 2006 DD18 repaired just in the last few weeks.  I used "the amp man" who you can find on ebay.  I was somewhat surprised it could still be fixed but I had it back in about a week and couldn't be happier.  Total cost to me was around $400 including shipping.  I really don't think it gets much better than this if you're using it at true subwoofer range.  Plenty of output and the servo means no distortion.  I was eyeballing SVS before I decided to see if it could be fixed and I'm glad I got it fixed.  There's no way a 13 inch sub with half the surface area could compare.

Amp man directs you to a video showing how to remove the plate amp in the description.  Disconnecting is easy, take a few pictures before disconnecting the wires for when you're reconnecting.  No cutting or soldering required.  

Velodyne Subwoofer Repair Service DD Series (authorized service center) | eBay