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The J-INFRA is a cardioid subwoofer designed to complement the J-Series system consisting of J8, J12 and J-Sub cabinets.
Its low-frequency response extends down to 27 Hz and can only be stacked symmetrically on ground as a conventional subwoofer array.
It has two inverted construction and three 21" drive units.
The two front panels are in the same inverted structure and are driven by one channel of the D12 power amplifierThe rear panel's 21" unit is driven by another channel of the D12 amplifier.
Thanks to its cardioid polar pattern, the system reduces unwanted low frequencies on the back side and greatly reduces the range of accurate low reproduction in the reverberation area of low frequencies.
Selecting Supercardioid mode in D12 optimizes the drive of the front and rear panel units, allowing the attenuation area to be adjusted to the left and right sides of the rear of the cabinet.
The J-INFRA loudspeaker cabinet is made of marine plywood and has a surface treated with impact-resistant and weather-resistant polyurethane.
The front and rear panels of the loudspeaker cabinet are made of rigid metal mesh, and the side panels are equipped with eight handles.
The front panel of the box is equipped with 4 mounting points to ensure that the transport trolley is locked during transport.
Data components: 3 x 21"Drive unit
SPL (1 m, free sound field) 1 d12 drive D80 drive: 141 144 dB SPL
Rated power (rms peak 10 ms) before: 1200 4800 W
After rated power (RMS Peak 10 ms): 600 2400 W
Frequency response (-5 dB): 27 Hz - 60 702 Hz
Number of D12 driveable cabinets: 1
Dimensions (H x W x D): 685 x 1180 x 10403 1158mm
Weight : 152 kg.