^ Yes, my James loudspeaker Baby Grand Concerto's have 10" sub built in and they are awesome...
Bi-Amp Full Range In-Wall
(1) 10" Slimline Subwoofer
(2) 8" Woofers
(1)Soft Dome Tweeter.
Patented AFDC Network, Sealed Aircraft Aluminum Enclosure.
Denon X4000, SC-91, VSX-51,VSX-81 Pioneer Elites and Denon 1611
James loudspeaker inwalls main and future theater
Other speaker zones DefTech, Polk, Russound, Boston Acoustics