Given the power rating, the module of the D-Sonic 3/3000 is probably the Pascal X-pro2. There is also a mono version of this amp, called 3/1500M, probably based on Pascal X-Pro1. See:
http://www.d-sonic.net/products/mono/
Cost of D-Sonic 3/1500M is $1300 per chassis.... And $2600 for a pair of 1500W Pascal amps is a pretty good deal.
Per my old notes, Dennis at D-Soic can be reached by phone at:
800-862-7998
Guido