J-INFRA Architectural specifications

The subwoofer system shall have forward and rear facing elements to produce cardioid or hypercardioid dispersion patterns. The front and rear elements of the subwoofer shall be driven by separate channels of a dedicated and compatible amplifier, containing loudspeaker specific configurations and algorithms to select cardioid or hypercardioid operating modes. The subwoofer shall exhibit extremely low power compression this reason use very large vents.
The cabinet shall incorporate 3 x 21" neodymium LF drivers, two forward and one rear facing.
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 power handling of the forward elements shall be 1200/4800 W (RMS/peak 10 ms) while the power handling of rear facing element shall be 600/2400 W (RMS/peak 10 ms).
The frequency response (–5 dB) measured on axis shall extend from 27 Hz - 60 Hz in standard mode and form 27 Hz - 70 Hz in 70 Hz mode with a maximum sound pressure level (SPLmax) (peak/1 m) of at least 144 dB.
The cardiod dispersion shall be switchable between cardioid and hyper cardiod.
The connection panel on the back shall be recessed and fitted with speakon NLT4 F/M sockets (EP5 or NL8 connectors as an option).
The dimensions (W x H x D) shall not exceed 1180 685 x 1158 mm (46.5" x 27" x 45.6") and shall weigh no more than 152 kg (335 lb).

The loudspeaker shall be the J-INFRA by: d&b audiotechnik GmbH & Co. KG.