Use CouponSmarter' s discount to save when shopping for The IWSub Reference is a completely self-enclosed in-wall subwoofer for use in whole house distributed music or stealth home theater installations. The Reference produces musically accurate low end thats never before been available in a compact, nearly invisible in-wall subwoofer that installs easily in new construction or existing walls. 13" white in-wall subwoofer  ...More Details