The d&b audiotechnik J-INFRA is a large-format, cardioid infrasonic subwoofer designed to extend the low-frequency performance of the d&b J-Series line array system down to 27 Hz. Used primarily in large-scale live concert touring and arena installations, it delivers high-impact infrasound while maintaining directionality.

Technical Specifications

• Frequency Response (-5 dB): 27 Hz – 60 Hz (extends to 70 Hz in 70 Hz mode)
• Maximum Sound Pressure Level (SPLmax): 144 dB (when powered by D80/D90 amplifiers)
• Components: 3 x 21-inch high-excursion drivers
• Weight: 152 kg (335 lbs)
• Dimensions (H x W x D): 685 x 1180 x 1040 mm (27.0 x 46.5 x 41.0 inches)
• Cabinet Construction: Marine plywood with a weather-protected Polyurea Cabinet Protection (PCP) finish