Infra218 - 3600 W hybrid passive subwoofer, 2 x 18" driver, 4 ohm

3600 W hybrid passive subwoofer, 2 x 18" driver, 4 ohm

High-performance subwoofer based on a hybrid design for extended low-frequency reproduction below 28 Hz. Exceptional power reserves combined with minimal distortion make the hd Infra218 a modern, yet flexible tool for large-scale touring and installation applications requiring extreme bass, high SPL and excellent dispersion control.

The horn-loaded hybrid cabinet, in bass-reflex configuration and optimally tuned, houses two special 18" long-excursion drivers with 5" voice coils. A large central airflow-optimized reflex port allows for minimal turbulence and distortion. The frequency response of 28 Hz ​​to 120 Hz makes the Infra218 suitable for perfectly extending the bass for all Harmonic Design loudspeakers. Thanks to its long throw, high efficiency and directivity, the hd Infra218 can be optimally integrated into line array applications.

The cardioid output is generated passively with two or three hd Infra218 stacked. An M20 threaded insert on the top and side of the cabinet allows for the insertion of a pole to secure the satellite speakers or to put a distance rod. Protective pads made of high-strength PVC on two sides and corresponding recesses on the top of the cabinet ensure a secure footing.

The speakON NL4 connectors, mounted on the rear of the recessed connection panel, are used to connect and route the input signal. A speakON socket in the protective front grille allows cardioid configurations without special interchangeable cables.

Main features

• High-performance hybrid subwoofer with 2 x 18” woofers (3600 W_RMS / 14,400 W peak)
• Extended low-frequency performance from 28 Hz
• 149 dB SPL max
• Passive directivity for 3-unit stack
• 2 x M20 threads
• Weight 89 kg

Technical characteristics

• Principle: bass-reflex system horn-loaded
• Transducers: 2 x 18″ long excursion woofer with a 5″ voice coil, vented at the pole piece and spider
• Crossover: active up to max. 120 Hz
• Power handling: 3600 W_RMS / 14,400 W peak
• Frequency response: 28 – 120 Hz
• Sensitivity: 102 dB/W/m
• SPL max: 149 dB (half space)
• Nominal impedance: 4 ohm
• Enclosure: robust multiplex housing, polyurethane coating black, recessed connection panel with 2 x NL4 rear, turning socket NL4 front, 2 x M20 threads, 6 x transport handles, steel grille with acoustic foam inside
• Connections: 2 x speakON NL4, 1 x speakON NL4 turning socket
• Dimensions: 1190 x 536 x 670 mm
• Weight: 89 kg
• Options: transport protection cover, hd SlientWheels Set, weather protection and RAL color customization