Tannoy\/TGI North America, Inc.","North American Product OnlyThe iwSA 500 is a single channel BASH© power amplifier specifically designed to deliver 500 watts (max) of optimally matched power to the Tannoy iw62 TS in wall subwoofer. This delivers impressive results in domestic or commercial installations; this in such applications as small venues, restaurants, bars, public buildings, AV installations and business music systems.