The CT-552 is a compact two-way loudspeaker system designed for constant-voltage and constant impedance applications. The cabinet includes a 100 V / 70 V transformer, as well as several taps for power. This dual drives unit provide a wide frequency response achieving a natural, smooth sound reproduction, ideal for use in PA systems and indoor background music applications. The A BS cabinet complies to UL 94V0 and can chosen between black ( PA CT-552BTBS) or white (CT-552WTBS) finish, allowing the best décor matching in any environment. On rear panel bottom there’s a small box, which includes the ceramic terminals connections. On rear panel top left angle, there’s a recessed rotary selector for power or impedance selection.