Velodyne DD15 - worth repairing the plate amp?

Maybe someone has a side by side comparision of the modern SVS SB-2000 and the Velodyne DD15?

Always worth looking at https://data-bass.com/#/?_k=mlkn4f

I seriously doubt the SVS-SB2000 is better than the Velodyne DD15.  Contrary to Chat GPT, the DD15 has more power and better extension than the SB2000.  A 15 inch driver has a lot more surface area than a 12.  It's proportional to the radius squared and that's 56.25 to 36.  The Velodyne is also a servo sub which keeps distortion below 1%.  You can't hear 1% distortion in deep bass so it is distortion free for all practical purposes.  I don't have anything against SVS but a sub that is $899 now is equivalent to maybe $500 20 years ago.  The Velodyne was 6 times that.  I know business models have changed and Velodyne's prices were too high but technology hasn't changed that much.  The DD15 has a 24lb magnet.  I recently looked at the driver on my DD18 when I pulled out the amp and it's an impressive looking driver.  It was not a budget product.  

No way that SVS is as good as the Velodyne.  That is absolutely worth repairing.   Pitch definition and power on those 15" DD are awesome.  My brother's HGS 15 II rocks , not many new subs can rival those servo subs in my opinion.    

HSU was also mentioned. and maybe the sealed SVS SB-3000 is a better comparison to the DD15.

If ported is tolerated, then the PB-3000 and HSU VTF-3 may fall into the ($1,000, used) category. HSU 15 looks seriously (way too) big, approaching the size of my 4.0 ft3 sealed 18" on the main system.