HK Audio LINEAR 5 MKII 115 Sub A 15" Active Subwoofer

HK Audio LINEAR 5 MKII 115 Sub A

The HK Audio LINEAR 5 MKII 115 Sub A delivers 1200W peak through a 15-inch woofer with 3-inch voice coil, reaching 130dB peak SPL while extending to 40Hz (-10dB). Remote-controllable DSP via EtherCON includes four cardioid presets front, 1:1 vertical, 1:1 horizontal, and remote eliminating measurement and manual routing when deploying directional bass arrays. The dedicated DSP output controls non-networked speakers with independent 10-band EQ, filtering, and processing.

Built in a hybrid birch multiplex/MDF cabinet weighing 72.5 pounds, the 115 Sub A balances output capability with transport practicality. The bass-reflex design focuses on punch and definition down to 44Hz (+/-3dB), making this the recommended extension for LINEAR 5 MKII mid/high units. Stereo preamplifier supports 2.1 configurations, V-Lock IEC connector prevents power disconnection, and the compact 18.9" x 21.1" x 26.6" footprint fits tight stage spaces. Made in Germany with attention to sustainable manufacturing practices. Explore our powered subwoofers for more bass solutions.

600W RMS Class-D Power With Extended Bass Response

The 600W RMS (1200W peak) Class-D amplifier drives the 15-inch woofer with 3-inch voice coil to 130dB peak SPL, providing output capability for mid-sized venue systems and touring applications. Bass-reflex tuning extends response to 40Hz at -10dB while maintaining controlled output that focuses on definition rather than excessive boom. The hybrid birch multiplex/MDF cabinet construction reduces weight to 72.5 pounds compared to solid birch designs, making single-person transport manageable while maintaining acoustic performance. The 48kHz DSP with less than 2ms latency maintains timing accuracy for live performance, and the stereo preamplifier preserves separate left/right channels for true 2.1 system configurations. Check out our PA speakers to complete your LINEAR 5 system.

Cardioid Presets For Vertical And Horizontal Arrays

Four integrated cardioid presets—front, 1:1 vertical, 1:1 horizontal, and remote—simplify directional bass deployment without requiring external processors or manual delay calculation. The vertical 1:1 preset configures two subs stacked vertically with one forward-firing and one rear-firing, while the horizontal 1:1 preset handles side-by-side placement. These presets automatically generate the phase-delayed signals needed for cardioid patterns that focus energy forward while canceling output behind the system. This reduces stage wash in live environments and minimizes low-frequency buildup in reflective rooms. The dedicated DSP output provides processed signal for controlling non-networked speakers with independent 10-band parametric EQ, high/low-pass filters, delay, polarity, limiting, and mute—all adjustable via DSP CONTROL software without affecting the main speaker's processing.

Networked DSP Control With Sustainable Construction

EtherCON RJ45 connectivity (in/thru) enables remote control via DSP CONTROL software for Windows and macOS, providing access to fully parametric 10-band EQ with variable filter characteristics, low-pass filtering, polarity control, level adjustment, delay, limiting, and mute functions. The lockable EtherCON connectors prevent accidental network disconnection during shows, and daisy-chaining supports multi-cabinet control from a single network connection. Dual XLR combo inputs accept balanced signals, with XLR thru outputs for signal pass-through and a dedicated DSP output for system expansion. The V-Lock IEC power connector with securing system prevents accidental power disconnection, and universal 100-240V operation eliminates external transformers when touring internationally. Made in Germany using pollutant-free wood, water-based lacquer, and strict recycling practices, the 115 Sub A combines professional performance with attention to environmental impact. Two MultiGrip handles support balanced lifting, and the M20 pole mount allows stacking mid/high units for compact system footprints.

Highlights

• 600W RMS / 1200W peak Class-D amplifier drives 15-inch woofer with 3-inch voice coil to 130dB peak SPL
• Bass-reflex design extends to 40Hz (-10dB) with 44Hz (+/-3dB) response in compact 72.5-pound enclosure
• Four cardioid presets (front, 1:1 vertical, 1:1 horizontal, remote) for directional bass deployment
• Networked DSP control (48kHz, <2ms latency) with 10-band parametric EQ and comprehensive processing
• Dedicated DSP output controls non-networked speakers with independent processing
• Hybrid birch multiplex/MDF construction with V-Lock IEC connector and lockable EtherCON
• Made in Germany with sustainable manufacturing practices and 5-year warranty after registration

LINEAR 5 MKII 115 Specifications

What's in the Box