I am using Outlaws 990/7700 to drive an HT system using vintage JBL L100T's as my mains. The specs are similar:
1" titanium dome tweeter
5" lamintated polymer midrange
12" Aquaplas woofer
Crossover points:
800Hz and 4,500Hz
frequency range:
35 - 27,000Hz
handling capacity:
max 400 wpc
efficiency:
91dB
impedance:
8 ohms.
Dimensions are 16" wide, 36 1/2" high and 13 1/4" deep. Shipping weight is 73 lbs. each speaker
I think you will really like the performance of the 7700. Previously I was using a NAD 216THX 125wpc amp for the JBLs and it was OK, but after I hooked up the 7700, it made a big difference in clarity and detail. I highly recommend this amp.