BASSBOSS VS21-MK3 - 2500W 21-inch Powered Vented Bandpass Subwoofer with 4.5-inch Voice Coil and 360-Degree Coverage in Black Finish

The BASSBOSS ZV28-MK3 subwoofer represents the pinnacle of deep, punchy low-end performance. Designed to deliver both extreme low-frequency extension and powerful punch, the ZV28-MK3 combines the best features of traditional vented and horn-loaded subwoofers into a highly efficient, compact hybrid system. Featuring a massive 21-inch driver with a 4.5-inch voice coil and advanced internal design, the ZV28-MK3 is engineered to provide both massive depth and the high-impact bass that enthusiasts demand. Whether you're using it for professional touring, large installations, or live events, the ZV28-MK3 offers a unique combination of precision, power, and flexibility.

The heart of the ZV28-MK3 is its 2500W RMS class-D amplifier, which provides exceptional output across the full spectrum of low frequencies. The amplifier features an auto-sensing, globally compatible power supply that works with voltages ranging from 90V to 250V, ensuring that the subwoofer can be used in virtually any location worldwide. At full output, the amplifier's high peak-output voltage produces powerful SPL hits, while its sustained output ensures reliable performance even during extended use. The amplifier also features passive cooling through an external heat-sink and woofer-generated airflow. In extreme conditions, two blower fans activate for additional forced-air cooling to keep the system running at optimal performance levels.

The ZV28-MK3's 21-inch woofer is equipped with a neodymium motor, which not only reduces the overall weight of the subwoofer but also increases its efficiency, allowing for louder sound output without the added weight of traditional ferrite drivers. The woofer's massive 4.5-inch voice coil and 58mm peak-to-peak excursion provide impressive low-end response, making the ZV28-MK3 capable of reaching depths other subwoofers can only dream of. The robust design of the woofer ensures that it can handle high output levels while maintaining low distortion, resulting in smooth and powerful bass that fills any venue with energy.

The ZV28-MK3's cabinet design incorporates a vented, short horn hybrid system, which combines the low-frequency extension of a vented subwoofer with the upper-frequency sensitivity and improved transient response of a horn. This unique design delivers high efficiency and power handling, while ensuring that bass frequencies remain smooth and well-defined. The cabinet is constructed from CNC-machined 18mm Baltic Birch plywood with dado and rabbet joinery, providing exceptional durability and minimizing resonance for cleaner sound. The enclosure also features an optimal volume tuned for low-frequency performance and is designed to enhance output while reducing distortion.

With a frequency response range from 27Hz to 100Hz (+3 dB), the ZV28-MK3 is capable of delivering ultra-low frequencies with impressive accuracy. Whether you need deep bass for music or need to fill a large venue with rumbling sub-bass, this subwoofer ensures that no note is left unheard. The ZV28-MK3's maximum SPL reaches 138 dB peak, ensuring that it can deliver an overwhelming, immersive bass experience even at the highest volumes. Whether used in full-range setups or paired with other subwoofers, the ZV28-MK3 maintains consistent output and minimizes thermal compression for sustained performance.

Flexibility and ease of use are key features of the ZV28-MK3. The subwoofer is equipped with three 35mm pole sockets, allowing for various mounting configurations depending on your needs. You can use the ZV28-MK3 in a vertical or horizontal orientation, and it is perfectly suited for use as a stand-alone subwoofer or when stacked with other systems. It also includes a versatile suspension system with 16 x M10 threaded flypoints for flying the cabinet in a permanent installation or for touring applications. The inclusion of interlocking rubber feet further enhances stacking and portability, making it easier to transport and set up, even in tight spaces.

The BASSBOSS ZV28-MK3 is equipped with a comprehensive DSP that includes high-pass and low-pass filters, phase alignment, and multi-stage limiting to protect the drivers from over-excursion, thermal overload, and clipping. The DSP operates in five different modes, which ensures smooth, distortion-free performance even during demanding situations. The DSP also features an Ethernet interface for remote control, firmware updates, and system monitoring, and it supports Milan AVB for easy network integration with other BASSBOSS systems. Up to 100 presets can be stored, with eight directly accessible at the touch of a button.

Whether you're a touring professional, venue owner, or serious bass enthusiast, the BASSBOSS ZV28-MK3 is designed to provide unmatched performance and reliability. With its deep, smooth, and powerful low end, the ZV28-MK3 will make an impact on any event. From its high-efficiency design and flexible setup options to its robust protection features and remote control capabilities, the ZV28-MK3 is a versatile and essential subwoofer for any serious sound system.

Features

• 5000W RMS (2 x 2500W) Class-D amplifier for high output, reliable performance
• Dual 18-inch neodymium motor woofers with massive 4.5-inch voice coils for superior low-frequency response
• Frequency response from 27 Hz to 100 Hz (+3 dB) for deep, clean bass
• Maximum SPL of 138 dB peak for powerful, immersive bass experience
• Innovative vented, short horn hybrid design for high sensitivity, increased transient response, and deep bass extension
• Neutrik powerCON True 1 TOP waterproof connectors for reliable performance in all environments
• Comprehensive DSP with high-pass and low-pass filters, phase alignment, and multi-stage limiting
• Ethernet interface for remote control, firmware updates, and monitoring via Milan AVB
• Rugged construction with CNC-machined 18mm Baltic Birch plywood and extensive bracing
• Flexible setup with three 35mm pole sockets for mounting and suspension system with 16 x M10 flypoints
• Dimensions: 22.5 x 42 x 42 inches (23.25 inches high with feet)
• Net weight: 235 lbs, shipping weight: 265 lbs
• Storage for up to 100 presets with eight directly accessible for quick adjustments
• Optional transport dollies and padded nylon transport covers for easy mobility and protection

Specifications

Acoustical

• Description: Subwoofer, single 21-inch powered and processed
• Frequency Response (+3 dB): 27 - 100 Hz (Preset dependent)
• Maximum Measured Output: 135 dB SPL, 1 meter, half-space (ground plane)
• Max SPL (Peak): 138 dB
• Nominal Dispersion (HxV): 360 x 360-Degree, Cardioid mode available with multiple boxes

Electrical

• Amplification: 2500 Watt RMS Class D Amplifier
• Processing: Integrated comprehensive DSP provides high pass, low pass, phase alignment and limiting
• Electrical Connectors, Amp: Neutrik powerCON True 1 TOP waterproof connectors
• Electrical Connector, Mains: Standard US 3-pin grounding 120V electrical plug: NEMA 5-15
• Voltage Operating Range: 100-240V
• Current Draw, Nominal: 4.6A @ 120 volts
• Current Draw, Peak: 20A
• Signal Input Connector: XLR-F
• Signal Output Connector: XLR-M (Direct pass-through, unprocessed)

Physical

• Enclosure Type: Vented, short horn hybrid
• Transducer: 1 x 21-inch (540 mm) neodymium motor woofer. 58 mm (2.28-inch) peak to peak excursion with waterproof fiber composite cone
• Cabinet Construction: CNC machined 18 mm Baltic Birch plywood with dado and Rabbet joinery
• Dimensions (HxWxD): 36 x 24 x 36 inches, 37.5 inches high with feet
• Net Weight: 180 lbs
• Shipping Weight: 230 lbs
• Exterior Finish: Weatherproof bonded high-pressure polyurethane
• Grille: Perforated, powder-coated steel
• Pole Sockets: 3 (35 mm) pole sockets
• Handles: 6 Integrated handles
• Feet: 12 interlocking rubber feet
• Suspension System: 16 X M10 threaded flypoints

Optional

• Transport Dollies (H or V): Dolly cart with 4 locking casters and recesses to accept interlocking cabinet feet
• Covers: Heavy-duty padded nylon transport covers for 1 cabinet