You may be right Pain. As I said, I was going of memory and that was a price that was many years old.
Yep, I was wrong. This is from Bruce Thigpen/Eminent Technology website.
TRW-17 transducer $12,900.00
Motor Controller $450.00
BT-42 Amplifier and crossover $1050.00
Design and installation, typical $8,000-$12,000*
*Note, design and installation fees include:
1. consulting engineering for the installation,
2. design and construction of the manifold at Eminent Technology
3. installation and setup of the TRW-17 by Eminent Technology
4. measurement and performance testing of the finished installation
5. travel for Eminent Technology employees
6. contractor fees for construction necesary for the installation