J12 Architectural specifications The loudspeaker system shall be 3-way actively driven between the low frequency and the mid/high sections. A passive crossover shall be used between the mid/high frequency sections. The loudspeaker shall only be operated by a dedicated, compatible controller amplifier. The loudspeaker shall produce a cylindrical wave segment suitable for use as an element in a line array and maintain an extremely accurate horizontal dispersion pattern down to very low frequencies (120° > 250 Hz). The loudspeaker shall have a design that exhibits extremely low power compression and for this reason shall utilize the rear rigging elements as a heat sink for the midrange driver. The loudspeaker shall consist of two 12" LF neodymium drivers in a vented enclosure, one hornloaded 10" midrange driver and two coaxially mounted 1.4" exit compression drivers with 3” voicecoils coupled to a waveshaping device. The enclosure shall be constructed from marine plywood with an impact resistant and weather protecting PCP (Polyurea Cabinet Protection) finish. The cabinet front shall be protected by a perforated steel grill backed with acoustic foam. The cabinet shall incorporate a three point rigging system for the assembly of vertical line source arrays of up to 24 cabinets in conjunction with a dedicated flying frame. The power handling of the LF section shall be 500/2000 W (RMS/peak 10 ms) while the power handling of the MF/HF section shall be 200/800 W (RMS/peak 10 ms). The frequency response (–5 dB) measured on axis shall extend from 48 Hz - 17 kHz with a maximum sound pressure level (SPLmax) (peak/1 m) of at least 143 dB. The horizontal dispersion shall be 120° > 250 Hz, while the vertical splay angle shall be ajustable in a range of 0° - 7° in 1° increments. The connection panel on the back shall be recessed and fitted with speakon NLT4 F/M sockets (EP5 connectors as an option). The dimensions (W x H x D) shall not exceed 1100 x 360 x 570 mm (1100" x 14.16" x 22.44") and shall weigh no more than 60 kg (132 lb). The loudspeaker shall be the J12 by: d&b audiotechnik GmbH & Co. KG.