Can you say "360-degree sound field"? Pioneer's engineers incorporated THX-EX into the awesome VSX-37TX, so now you'll have a Surround Back (SB) channel for 6.1 sound (7.1, if you use two SB speakers). Movies will totally encircle you with the sound intended by a film's director, for a new level of realism. The VSX-37TX also features 120 Watts per channel x 5 in surround mode, as well as super-rugged construction for the purest sound quality. Its well-appointed back panel includes an AC-3 RF input, for added system options. The VSX-37TX is covered by Elite's two-year warranty.