Alto Professional TS18S 18-Inch Powered PA Subwoofer

The Alto Professional TS18S is a powered PA subwoofer built around a 18-inch driver with a 3-inch high-temperature voice coil. Its Class D amplifier is specified at 2,500 W peak; that figure is not a continuous or RMS rating. Off, Live and DJ EQ settings provide different tuning choices, while the phase selector offers 0, 90, 180 and 270-degree settings to help integrate the bass with the main speakers. Two XLR/quarter-inch combo inputs accept wired audio signals and two XLR thru outputs provide onward connections. The internally braced, front-ported MDF cabinet includes a pole socket, but a pole and full-range speaker are not part of this single-subwoofer listing. It needs mains power and suitable full-range speakers for a complete PA; it is not a wireless or battery-powered loudspeaker.