According to the Jamo's owner's manual
- 6.5" driver
- dual 6.5" passive radiators
- 800 "mystery" watts amp
- 42-200Hz +/- ?dB (the product page says +/-3dB)
- 8" x 8" x 8"
Dunno what your installer is charging you for it, but it's listed on Amazon.com for ~$320. For $300 or less when it's on sale at Newegg.com (at this time, it's selling for $279), you can snag a Klipsch RW-12d
which will easily outperform the Jamo.
Have the installer take back the Jamo, if you can. If you can't, well, I hope it rocks as well as he says it does.
Just my 2¢... Edited by eljaycanuck - 5/2/13 at 5:15pm