The J-INFRA is the cardioid infra subwoofer for the J-Series. It can be used to supplement J-Series systems consisting of J8, J12 and J-SUB cabinets in various combinations. It extends the frequency response of a J-Series system down to 27 Hz J-INFRA cabinets can be used ground stacked in a conventional L/R setup as well as arranged in a subwoofer array. One J-INFRA cabinet provides additional very low frequency energy for two J-SUBs.

The J-INFRA cabinet is an actively driven 2-way bass-reflex design housing three long excursion neodymium 21“ drivers, two drivers face to the front while one driver radiates to the rear of the cabinet. Front and rear drivers are driven by separate amplifier channels and operate in independent bass reflex chambers. Through its cardioid dispersion pattern this setup avoids unwanted energy behind the system and greatly reduces the reverberant field at low frequencies providing highest accuracy in low frequency reproduction. J-INFRA cabinets have to be arrayed with a minimum distance of 60 cm (2 ft) between adjacent cabinets.

The cabinet is constructed from marine plywood and has an impact and weather protected PCP (Polyurea Cabinet Protection) finish. The front and rear of the loudspeaker cabinet are protected by a rigid metal grill. Each side panel incorporates four handles and mounted on the rear panel are four heavy duty wheels. Two runners extend from the rear to the front panel of the cabinet protecting the bottom panel against scratching.

Two correspondingly shaped recesses are incorporated in the top panel of each cabinet to accept these runners and prevent cabinet movement when stacking J-INFRAs. The cabinet front is fitted with four catches for securing the optional transport lid E7920.

Note: Professionally maintained and teched prior to shipment.