HK Audio LINEAR 5 MKII 118 SUB HPA - Compact 18' bass reflex subwoofer

HK Audio LINEAR 5 MKII 118 Sub HPA — 18" active bass reflex subwoofer

The LINEAR 5 MKII 118 Sub HPA is the most powerful active subwoofer in the LINEAR 5 MKII series. Its 18" driver with a 4" voice coil, combined with a 1,500 W RMS (3,000 W peak) Class D amplifier and high-performance DSP , delivers deep, defined bass reproduction with ample headroom from 33 Hz (–10 dB). Selectable cardioid presets (1:1 and 2:1 vertical) are available directly on the cabinet , simplifying stage and field setup with back dispersion control. Processing is fully adjustable via the HK Audio DSP CONTROL app (Mac/Windows) via an RJ45 EtherCon network. Birch plywood construction, 4 MultiGrip handles , an M20 pole mount and PowerCon link connections streamline everyday setup for touring, rental and installation applications.

Main features

• LF Transducer: 1 × 18" with 4" voice coil.
• Amplification: Class D, 1,500 W RMS / 3,000 W peak.
• Max SPL: 131 dB peak (130 dB average @10% THD, half-space).
• Frequency response: 36 Hz – X-over (–6 dB) / 33 Hz – X-over (–10 dB).
• Integrated DSP: 10-band parametric EQ, low-pass , polarity, level, delay , limiter and mute.
• Filter presets: Front, Cardioid 1:1 vertical, Cardioid 2:1 vertical, Remote (selectable on the panel).
• Network control: HK Audio DSP CONTROL software (Mac/PC) via EtherCon RJ45 (In/Thru).
• Latency and sampling: ≤ 2.6 ms; 48 kHz.
• Analog Connectivity: 2 × balanced XLR/TRS combo inputs, 2 × XLR Thru outputs, 1 × XLR DSP Out.
• Power supply: PowerCon In/Link (100–240 V); nominal consumption 2.5 A.
• Mechanical design: birch plywood bass reflex enclosure, 4 MultiGrip handles, M20 flange, steel grille with acoustic foam.
• Included accessories: RCS – Rain Cover Set (electronics protection in the rain).
• Dimensions and weight: 60 × 60.8 × 79 cm; 56.8 kg.
• Finish: black (Jet black, RAL 9005). Made in Germany.

Product benefits

• Powerful and controlled bass: more energy in low frequencies with precision and punch.
• Hassle-free cardioid: Direct presets for 1:1 or 2:1 stacking and reducing rear sound.
• Professional workflow: PowerCon with link, EtherCon network and DSP Out to integrate satellites without DSP.
• Sturdy construction: birch wood, MultiGrip handles and durable finish for heavy duty use.

Use cases

• Bass reinforcement for concerts, festivals, and outdoor events with rear spill control.
• Rental companies requiring fast, repeatable cardioid setups.
• Low frequency extension for LINEAR 5 MKII systems (e.g. with 308 LTA) or other compatible arrays.

Frequently Asked Questions

• How do I set it to cardioid? Select the 1:1 or 2:1 preset on the panel and stack the subs vertically according to the chosen mode, maintaining separation from walls whenever possible.
• Can I adjust the DSP from a computer? Yes, with HK Audio DSP CONTROL via EtherCon (Mac/Windows).
• Does it include rain cover? Yes, it comes with the Rain Cover Set (RCS) to protect the electronics while keeping controls and connections accessible.

Accessories and options

• Protective Cover / Weather Protective Cover: specific transport and weather covers.
• CS-WB1 Wheelboard and Cover CS-WB1: Wheeled base and cover for transporting 1–2 subs.
• DFP Double Flange Plate: M20 double plate for poles/t tilt-units in configurations with tops.

Description for projects

18" bass reflex active subwoofer (4" voice coil); 1,500 W RMS / 3,000 W peak; Max SPL 131 dB; response 36 Hz–X-over (–6 dB) / 33 Hz–X-over (–10 dB); DSP at 48 kHz with 10-band EQ, LPF, delay, polarity, limiter, mute; presets Front/Cardioid 1:1/Cardioid 2:1/Remote; 2 × XLR/TRS inputs, 2 × XLR Thru outputs + 1 × XLR DSP Out; EtherCon RJ45 In/Thru network; PowerCon In/Link; M20 flange; 60 × 60.8 × 79cm; 56.8kg; Includes Rain Cover Set.