HK Audio L SUB 1500 A - 15” Active Subwoofer for PA

HK Audio LINEAR SUB 1500 A – 15” Active Subwoofer for PA

The HK Audio LINEAR SUB 1500 A is a 15” self-powered subwoofer with a bass-reflex enclosure that delivers punch, control and true low-frequency extension to professional PA setups. With a response down to 45 Hz (-10 dB) , a maximum SPL of 132 dB (peak) and 1200 W (peak) Class D amplification, it integrates seamlessly with LINEAR 3 and LINEAR 5 systems, and functions as bass extension in ELEMENTS Easy Base, Smart Base and Line Base . It incorporates a 24 dB/oct subsonic filter , peak limiter and active protections to guarantee reliable performance on the road, in installations and at events.

The connection panel offers two balanced XLR/jack combo inputs , two XLR Thru outputs for signal chaining, and two XLR Line Out Mid/High outputs with integrated high-pass, facilitating clean 2.1 systems without external processing. A selectable 100/120 Hz (24 dB/oct) active crossover , 0°/180° Phase switch, and ±6 dB Bass Gain control simplify venue tuning. MDF construction with a black acrylic enamel (RAL 9005) finish, a steel grille with acoustic foam , an M20 pole socket , and two HK Audio MultiGrip handles combine durability and portability in a compact 48.5 x 48.5 x 59.5 cm , 29.8 kg form factor.

Main features

• Transducer: 1 × 15” with 3” coil.
• Enclosure: Bass-reflex design optimized for punch and control.
• Amplification: Class D, 1200 W (peak).
• Max SPL: 130 dB (mid) / 132 dB (peak, 10% THD), half-space.
• Frequency response: 49 Hz – X-Over (-6 dB) / 45 Hz – X-Over (-10 dB).
• Active Crossover: 100/120 Hz selectable, 24 dB/oct slope.
• Inputs/Outputs: 2 × balanced XLR/jack combo, 2 × XLR Thru, 2 × XLR Line Out Mid/High with high-pass.
• Controls: Bass gain ±6 dB, Phase 0°/180°, Auto Sleep switchable.
• Protections: undervoltage, thermal, short circuit, overcurrent, 24 dB/oct subsonic filter and peak limiter.
• Power supply/consumption: 220–240 V~ 50/60 Hz, nominal consumption 3 A; IEC connector with V-Lock retainer.
• Construction: MDF, black acrylic enamel (RAL 9005), steel grille with acoustic foam.
• Mounting: M20 socket for satellite bar; 2 HK Audio MultiGrip handles.
• Dimensions (W × H × D): 48.5 × 48.5 × 59.5 cm; Weight: 29.8 kg.

Product benefits

• Powerful, defined bass: extension down to 45 Hz and high dynamic range for live music, DJs and AV.
• Easy integration: Mid/High outputs with high-pass and selectable crossover to combine with LINEAR tops without external processors.
• Quick Setup: Switchable phase and bass level control allows you to fine-tune your system in minutes.
• Professional reliability: a full suite of electronic protections and a subsonic filter protect the transducer under demanding conditions.
• Comfortable transport: compact format, 29.8 kg and MultiGrip handles for agile assembly.

Use cases

• Bass reinforcement in LINEAR 3/5 systems for live performances, venues, and corporate events.
• Bass extension in ELEMENTS Easy Base, Smart Base and Line Base configurations.
• 2.1 systems with active tops using the filtered Mid/High outputs.

Frequently Asked Questions

• Can I create a 2.1 system without an external processor? Yes. Input through the two combo inputs and output the satellites from the Mid/High Line Outs using the internal crossover; select 100 or 120 Hz depending on the venue.
• Does it have an auto-off feature? Yes, it has a switchable Auto Sleep function for energy savings.
• What's the input sensitivity? +4 dBu with the gain control on the center click.
• How do I attach a satellite bar? It includes a standard M20 socket compatible with M20 bars and studs.

Description for projects

15” active bass-reflex subwoofer (3” voice coil), Class D amplification 1200 W (peak), max SPL. 130 dB average / 132 dB peak, response 49 Hz – X-Over (-6 dB) / 45 Hz – X-Over (-10 dB), active crossover 100/120 Hz (24 dB/oct), 2 × balanced combo XLR/jack inputs, 2 × XLR Thru and 2 × XLR Line Out Mid/High with high-pass outputs, ±6 dB gain controls, 0°/180° phase and Auto Sleep, protections (undervoltage, thermal, short circuit, overcurrent, subsonic 24 dB/oct, peak limiter), M20 plinth, MDF with black acrylic enamel, steel grille with acoustic foam, dimensions 48.5 × 48.5 × 59.5 cm and 29.8 kg.