I received a reply concerning the WATCH Dog from Wilson. It appears that Mark was correct.
Hi Dr. Plaskin,
In our efforts to keep up with custom applications (built-ins), our dealers have been asking about modular subwoofers for some time - the ability to stack or configure multiple subwoofers in a single system. Thus, the unpowered Watch Dog was born. We are officially releasing it hopefully this week. We also plan to have available the controller section of the Watch Dog in a single, rack mount version. We plan to use the same manufacturer to build the controller as the one who built the amp/controller for the Watch Dog. As with all amplifiers and electronics, there were a few isolated events early during the production stages, however, in general, the Watch Dog 2 has been very reliable.
The new subwoofer uses the same driver and cabinet volume as well.
If you have any further questions, you can reach me at the contact information listed below.
Wilson Audio Specialties, Inc.firstname.lastname@example.org