What is a Back Box? It is an enclosure that you install between you studs and prewire your speaker cables into it. Your sheet rockers cut the drywall around your speaker opening so that you don't have to. When you install your speakers the cable is right there and you don't have to dig for it in your finished wall. Your speakers are Acousticly Matched and sound better becaused this space is Acoustic Enhanced.

BRAND NEW...NEVER USED...STILL IN BOX! PLEASE SEE PHOTOS!

These sell for $50 online and in stores. BRAND NEW...NEVER USED ...STILL IN BOX!

Picture number 2 shows back box with Jamo 6.5 inch speaker inside of it. 

Fire rated back box Hole Size: 11.5" x 7.8"       Product dimensions (HxWxD): 18" x 17.75" x 3.5" 

Designed to work with Jamo 661K4, 660A2, 660CS, I/O 660Aand most 6,5"' Wall Speakers Every Jamo back box exceeds the one-hour fire rating specifications and meet UL2043 requirements for installation into plenum spaces.