HK Audio Linear Sub 1800A Speaker

HK Audio Linear Sub 1800A is a high-end active subwoofer from professional audio brand HK Audio (Germany), designed to deliver powerful, deep and accurate bass for professional performance, stage and high-end karaoke systems.

This is not simply a bass-emitting device, but a strategic audio solution that reproduces low frequencies with high precision, bringing a realistic and vivid musical experience to the listener.

Introducing the HK Audio Linear Sub 1800A Subwoofer

HK Audio Linear Sub 1800A is a high-end powered subwoofer with integrated Class D amplifier with 1200W peak power, using 18-inch speaker with 3-inch voice coil, for deep, powerful and accurate bass.

With SPL up to 132 dB and frequency range from 42 Hz – X-Over, the product is ideal for professional stage, event and karaoke sound systems. Integrated comprehensive protection circuit, sturdy cabinet design, flexible connection – this is the perfect choice to enhance the experience of powerful and stable bass.

Technical parameters of the product to consider:

• Maximum SPL: 130 dB @ 10% THD (half space, 40 Hz – X-Over ponderous): 130 dB in half space (floor-to-floor, no rear reflections) is an extremely high volume level, enough to fill a stage space of 200–500 m² with clear, powerful bass while still maintaining quality control. The average frequency range measured from 40 Hz to the crossover frequency (X-Over) shows that the speaker maintains high sound intensity even at very low frequencies, where conventional speakers are prone to sound loss or distortion.
• Peak SPL: 132 dB @ 10% THD (half space): The 132 dB SPL peak level means that the speaker can "explode" at peak moments without distortion exceeding the allowable threshold (10% THD). This shows that the speaker can produce strong, compact bass, suitable for large spaces such as stages, halls, bars, clubs, and outdoor stages. The 130-132 dB level is the professional threshold, enough to fill hundreds of square meters of space without distortion (Total Harmonic Distortion is only 10%).
• Frequency response range: ±3 dB from 42 Hz to X-Over and -10 dB down to 38 Hz: This means the speaker can reproduce very deep bass, suitable for electronic music, EDM, hip-hop or stage effects. The frequency of 38 Hz is close to the limit of human hearing, bringing a feeling of "visceral vibration" in the space of live music.
• Speaker structure: 1 x 18″ LF driver, 3″ voice coil: The 18-inch speaker has a large surface area, allowing for longer, deeper bass waves. The 3-inch voice coil helps dissipate heat better, withstand high power and operate stably, prolonging the speaker's life and increasing the accuracy of the bass range.
• Amplifier output power: 1200W Class D circuit: With integrated Class D amplifier, the speaker delivers strong power but low power consumption, low heat generation - high efficiency, stable and durable. 1200W peak power allows the speaker to handle strong bass beats at climax without distortion.
• Active protection circuit: Temperature protection, low voltage, over current, short circuit, 24 dB/oct subsonic clipping, peak limiter: This is a comprehensive shield for the speaker – preventing damage due to unstable power supply or harsh operating conditions, ensuring stable performance for long performances.
• Signal Connections: 2 x XLR combo balanced inputs and 2 x XLR Thru, 2 x XLR Mid/High Out outputs: Diverse connections make it easy to combine the speaker with digital echo, mixer, power amplifier or other full-range speakers, expanding the sound system in a coherent and professional way.
• Power consumption: 3A at 220V | 6A at 110V according to safety standard EN 60065: Reasonable power consumption, compatible with many stage power systems and business karaoke, does not overload the total power source.
• Dimensions & Weight: 51 x 67 x 72 cm and 42 kg: With its large size and heavy weight, the speaker is designed for permanent installation or transportation by specialized vehicles. The sturdy 16 mm MDF speaker cabinet has a MultiGrip handle and M20 pole mounting holes, supporting the installation of mid/high satellite speakers above.

Outstanding features of Subwoofer HK Audio Linear Sub 1800A

HK Audio Linear Sub 1800A is a subwoofer line that possesses many outstanding advantages in design, user experience and practical application. The following features are the reasons why the product becomes the top choice in professional sound systems and high-end karaoke.

• Professional design, easy to install: HK Audio Linear Sub 1800A has a black scratch-resistant painted MDF cabinet, convenient multi-point handle and M20 pole mounting hole - making moving and installing on stage or karaoke room easy, quick and professional.
• Diverse connections, flexible combination: Equipped with 2 XLR combo input ports and 4 output ports (Thru + Mid/High), Sub 1800A supports seamless expansion of the sound system, compatible with digital reverb, mixer and modern mid/high speakers.
• Subtle, powerful yet well-controlled bass: Not only creating powerful bass, Sub 1800A also maintains neatness and precision, without causing background noise - very suitable for music genres that require cleanliness such as acoustic, live vocal or EDM.
• Stable, long-term reliable operation: Equipped with intelligent protection circuit, the speaker operates stably for many hours continuously without worrying about overheating, power interference or technical errors - ideal for large events or business karaoke systems.
• Perfectly compatible with HK Audio ecosystem: HK Audio Linear Sub 1800A is designed to be synchronized with the Linear 3, Linear 5, Elements, Sub 1800A speaker lines, helping to easily build a comprehensive, balanced, smooth frequency range sound system and save configuration time.
• Quality assurance from German brand: Manufactured according to the high standards of HK Audio - the leading audio brand in Germany, the product has high quality, outstanding durability and a reputable warranty in Vietnam.

Detailed review of HK Audio Linear Sub 1800A Speaker

Powerful, incredible sound performance for the price

The HK Audio Linear Sub 1800A delivers one of the best bass experiences in the mid-range professional subwoofer segment.

With a maximum SPL of 130 dB and a peak SPL of 132 dB, the speaker can reproduce powerful bass without distortion, even in large stage or hall spaces.

Frequency response down to 42 Hz (±3 dB) and extending to 38 Hz (-10 dB) allows the HK Audio Linear Sub 1800A to effectively handle deep bass, powerful kicks or EDM drops, while still maintaining good control and compactness.

Solid construction, suitable for professional performance

HK Audio Linear Sub 1800A speaker is made of 16mm MDF wood covered with scratch-resistant black acrylic paint, ensuring durability in continuous operating environments. The 2mm front metal mesh with sound-absorbing foam inside helps protect the speaker and optimize acoustics.

Designed with MultiGrip handle and M20 pole mounting hole, suitable for flexible installation on stage or high-end karaoke system. This is a “ready-to-tour” design, well meeting the needs of mobile performance or fixed installation.

Advanced amplifier technology, energy saving and stable

HK Audio Sub 1800A uses a Class D amplifier with a peak power of 1200W, which not only ensures high performance but also helps save energy and reduce heat generation.

Class D technology is increasingly becoming the standard for modern audio systems thanks to its fast signal response, good conversion efficiency and compact design.

Comprehensive protection circuit – ensures long-term safe operation

One of the biggest plus points of the HK Audio Linear Sub 1800A speaker is the integrated active protection circuit system, including: overheating, overcurrent, short circuit, low voltage, peak limiter and 24 dB/oct subsonic crossover.

This is especially important when using the device at high intensity, for long periods of time or in unstable power environments – ensuring the system always operates durably and safely.

Flexible connection, easy to combine systems

HK Audio Linear Sub 1800A is equipped with 2 XLR combo balanced input ports, 2 XLR Thru ports and 2 Mid/High Out ports, Sub 1800A easily integrates into any sound system.

Separate output ports for mid/high speakers help route signals clearly, optimizing sound quality when connecting to full-range speakers or synchronized line array speakers.

Applications of HK Audio Linear Sub 1800A Subwoofer

HK Audio Linear Sub 1800A is a line of subwoofers that can flexibly adapt to many different sound environments. Below are typical practical applications of this valuable subwoofer model.

• Professional indoor and outdoor performance stage.
• High-end karaoke sound system, VIP room, professional business.
• Conference center, wedding restaurant, church and multi-purpose space.
• Mobile sound system, audio equipment rental service.
• Sound systems for recording studios, rehearsals and multi-purpose sound rooms.

Where to buy HK Audio Linear Sub 1800A Speakers at cheap, reputable, quality, reliable prices?

If you are looking for HK Audio Linear Sub 1800A subwoofer with reasonable price, guaranteed quality and reputable service, Phuc Truong Audio is a reliable address in Vietnam.

With over 10 years of experience in the field of genuine audio equipment and karaoke systems, Phuc Truong Audio has built a solid reputation in the music-loving community and audio experts. Phuc Truong Audio specializes in providing genuine audio equipment, including products from the famous brand HK Audio.

HK Audio Linear Sub 1800A products here are committed to origin, ensuring quality and optimal performance. The technical staff at Phuc Truong Audio is always ready to advise and support customers in choosing and installing products suitable for their needs.

When purchasing at Phuc Truong Audio, you will receive a genuine warranty, dedicated after-sales service and competitive pricing policy. This is truly an ideal choice for those who want to invest in a high-quality sound system at a reasonable price.

Frequently asked questions about Subwoofer HK Audio Linear Sub 1800A

Is HK Audio Linear Sub 1800A speaker suitable for karaoke system?

Yes. Although designed for professional stage, with its powerful, clean and well-controlled bass, the speaker is well suited for high end karaoke system, especially large karaoke rooms or professional businesses. Bass helps vocals to be thick, solid and the background music to become more vivid.

Does the HK Audio Linear Sub 1800A speaker need a separate amplifier?

No need. HK Audio Linear Sub 1800A is subwoofer Active, built-in Class D amplifier with peak power of 1200W. Users only need to supply audio signal and power source for the speaker to operate independently.

Is it effective to use Sub 1800A outdoors?

Very efficient. With a peak SPL of up to 132 dB, the speaker is capable of filling large open spaces and handling powerful bass in outdoor performances, sounding board, events, fairs… The speakers are also designed to be sturdy, easy to transport and highly stable in mobile environments.

Is the speaker compatible with wireless microphones or digital audio systems?

Yes. The HK Audio Linear Sub 1800A processes balanced analog audio signals via XLR ports, so it is compatible with any modern sound system, even if you use wireless microphones, digital mixer, IP audio system or Dante/AES67 wireless (if suitable converter is available). This shows high connectivity openness, flexible for even complex systems.