The i-12 was designed to provide an extreme low frequency solution for a variety of applications. The unique design provides unprecedented sonic depth from an enclosure of this size. With a response extending down to below 28Hz, the i-12 is ideal as true sub bass in live venues or nightclubs, or as an effect for theatres, museums, cinemas or even simulators. The enclosure contains four high power 12” (305mm) drive units, loaded as two compound isobaric pairs. This design gives a usable response down to 27Hz, without any artificial equalisation. The i-12 can therefore add ‘depth and warmth’ to any system, even where larger subwoofers would normally have been used. Connections are via a pair of NL4 connectors on a recessed rear panel for input and enclosure link. Also located on the rear panel is a recessed switch which changes the impedance of the i-12 from 2 ohms to 2 x 4 ohms. The rugged enclosure is constructed from premium 18mm (3/4”) multi-laminate Birch plywood, rebated, screwed & glued together for maximum strength. The enclosure is finished in black or white textured paint as standard, however RAL colour matching and weather protection options are available. Two steel bar handles on each side of the enclosure are fitted to enable easy movement of the subwoofer. Two perforated steel mesh grilles covered with acoustically transparent black foam protect the drive units from damage and moisture. For service purposes, the rear pair of drive units can be accessed via a removable door on the rear panel of the enclosure. The i-12 requires active high/low pass filters and one or two amplifier channels (depending on mode selected) capable of delivering 1500-2000W RMS into a 2 ohm load, or 2 x 800-1000W into 4 ohm loads. For optimal results, either the DQ Series Advanced System Amplifiers, or the AQ or AD Series amplifiers combined with DSC48 processors should be used.