Yi-SUB Architectural specifications The loudspeaker shall be an integrated cardioid subwoofer consisting of a 18" driver in a bass-reflex design radiating to the front and a 12" driver in a two chamber bandpass design radiating to the rear, with both drivers to be powered by a single amplifier channel. The loudspeaker shall only be operated by a dedicated, compatible controller amplifier. The cabinet enclosure shall be made from marine plywood with an impact resistant black paint finish. Special colours according to RAL table and a weather resistant option shall be available upon request. The drivers shall be protected by a rigid metal grill backed by an acoustically transparent foam. The cabinet shall incorporate a three point rigging system for the assembly of vertical arrays in conjunction with a dedicated flying frame. The cabinet shall allow splay angle settings of 2.5° between subsequent cabinets. The connection panel on the back shall be recessed and fitted with two speakon NL4 M sockets and a two pole screw terminal block. A cover plate for protection of the connection panel shall be included. The power handling capacity shall be 600 W RMS and 2400 W peak (10 ms). The frequency response (–5 dB) measured on axis shall be 39 Hz to 140 Hz with a maximum sound pressure of at least 134 dB. The dimensions (WxHxD) shall not exceed 630 x 500 x 700 mm (24.8" x 19.7" x 27.6") and shall weigh no more than 49 kg (108 lb). The loudspeaker shall be the Yi-SUB by: d&b audiotechnik GmbH & Co. KG.