The BGX-4850 is the first in-wall subwoofer to achieve THX Ultra2TM Certification as well as the first audio product to  incorporate THX Balanced Bass-lineTM, a proprietary new THX technology for delivering vibration-free bass from a very  compact speaker design. There is no other in-wall or on-wall sub with this feature.                          

The BGX-4850 is as dramatic in appearance as it is advanced in technology and
performance. Incorporating proprietary THX technology, the BGX-4850 promises 
to deliver incredible bass performance with minimal distortion — even in large
home theater venues.

The BGX-4850 consists of four powerful modules, each containing 12 
micro-precision woofers within their own enclosures, arranged in balanced 
pairs. The four modules have a total radiating area equal to two 18 inch drivers, 
yet fit completely inside a standard 2x4-inch stud-wall. For each module, all 
that is visible to the listener is a tall, slim grill 26.5 inches high and just 7 inches
wide. Being entirely self-contained, the modules do not rely on the wall cavity 
in which they reside, or a separate back-box. So unlike most in-wall subs, 
your walls won’t be shaken and sound will not intrude into adjacent rooms.

Key Features of the BGX-4850 Subwoofer:

• First THX Ultra2 Certified in-wall subwoofer
• THX Balanced Bass-lineTM is a proprietary new THX technology for delivering vibration-free bass from a very compact speaker design
•  Subwoofer modules are self-contained and do not rely on the wall cavity or back boxes. This delivers best possible performance with consistent results
•  48 woofers have total radiating area equivalent to two 18” drivers
• >Fits inside standard 2X4 stud wall with visible grill only 26” high and 7” wide

 The BGX-4850 can also be adapted for on-wall or in-room use