HK Audio LINEAR 5 MKII 115 SUB A - 15" active bass-reflex subwoofer with DSP and network control

HK Audio LINEAR 5 MKII 115 Sub A — 15" active bass-reflex subwoofer with DSP and network control

The LINEAR 5 MKII 115 Sub A is a 15" powered subwoofer with a bass-reflex enclosure, designed to deliver punchy, defined, and controlled bass in professional PA , FOH, live, and club applications. It features a 600W RMS (1,200W peak) Class D amplifier and high-performance DSP (48kHz, <2ms) with selectable cardioid presets and EtherCon network control (Windows/macOS). The DSP Out output allows the processed signal to be sent to non-networked speakers, facilitating 2.1 and mixed system setups. Its hybrid multi-ply birch/MDF construction, 2mm metal grille with acoustic foam, and acrylic enamel finish ensure durability and a professional appearance for touring and rental use.

Main features

• LF Transducer: 1 × 15" with 3" voice coil for powerful and defined bass.
• Power: 600 W RMS / 1,200 W peak (Class D); Max SPL: 130 dB (peak, half-space).
• Frequency response: 44 Hz – X-over (±3 dB) / 40 Hz – X-over (–10 dB).
• Professional DSP: 10-band parametric EQ, HPF / LPF , polarity, level, delay , limiter and mute .
• Built-in filter presets: Front, Cardioid 1:1 vertical, Cardioid 1:1 horizontal, and Remote.
• Connectivity: 2 × XLR/TRS combo (In), 2 × XLR (Thru), 1 × XLR ( DSP Out ), EtherCon RJ45 In/Thru for software control.
• Streamlined workflow: integrated stereo preamp for 2.1 setups and preset selection from the panel.
• Touring-grade construction: birch/MDF hybrid enclosure, M20 pole flange , 2 MultiGrip handles , steel grille with acoustic foam.
• Power supply: IEC with V-Lock system (100–240 V).
• Dimensions and weight: 48 × 53.5 × 67.5 cm; 32.9 kg.

Product benefits

• Bass with control and range: cardioid modes (vertical or horizontal) to reduce rear spill without complex measurement.
• Easy integration: DSP Out to power tops without DSP and centralized network control.
• True versatility: from clubs and bars to stages and corporate events; as a standalone sub or in multiple stacks.
• Live reliability: protection by limiters and electronics optimized for intensive use.

Use cases

• FOH for bands, DJs and mobile discos that demand high SPL with defined bass.
• Low-frequency reinforcement in venues, clubs, and corporate events.
• Cardioid arrays for stages sensitive to rear projection of bass.

Frequently Asked Questions

• Do the RJ45 connections carry digital audio? No. The EtherCon network is used for DSP control and monitoring (Windows/macOS). Audio is handled by the analog inputs/outputs and the DSP Out .
• How do I set up a cardioid array? Select 1:1 vertical or horizontal in the Cardioid panel and place/stack the subs according to the chosen mode. Adjust distances and polarity according to the preset.
• Can I build a quick 2.1 system? Yes. Use the sub's stereo preamp and the DSP Out to send the processed signal to the tops.

Description for projects

15" active bass-reflex subwoofer (3" voice coil); 600 W RMS / 1,200 W peak; max. SPL 130 dB (peak); response 44 Hz–X-over (±3 dB) / 40 Hz–X-over (–10 dB); DSP 48 kHz (< 2 ms) with 10-band EQ, HPF/LPF, polarity, level, delay , limiter, mute ; presets Front, Cardioid 1:1 vertical, Cardioid 1:1 horizontal, Remote; 2 × XLR/TRS In, 2 × XLR Thru, 1 × XLR DSP Out; EtherCon RJ45 In/Thru network (control); M20 flange; 48 × 53.5 × 67.5 cm; 32.9 kg; birch/MDF hybrid enclosure; black finish.