The QSC Powerlight 2 Series amplifiers are designed for touring and live sound applications. The amps incorporate built-in clip limiters and selectable low-frequency roll-off filters to boost system response, an air filter for protection from dust, a detachable "locking" IEC power cable, and a standard dataport for interfacing with the QSC Qscontrol, or other audio network control devices. A variety of I/O options are available, including Neutrik Speakon connectors, binding post outputs, and heavy-duty Canon-type XLR and three-pin detachable Euro-style input connectors. The four models - PL218, PL224, PL230, and the PL236 - range in power from 900 to 1,850W per channel at 2ohms. All models are 2RU, weigh 21lbs, and are offered in three versions. The base model is suitable for systems using external signal processing; the "A" version offers internal analog signal processing; and the "D" style includes complete DSP capability. QSC Audio Products Costa Mesa, CA