BassBoss VS21-MK3

Powered Subwoofer

BassBoss VS21 MK3 is a high-output powered subwoofer designed to deliver deep, punchy low end from a single 21" driver. Its hybrid vented short-horn 6th-order bandpass enclosure combines extended bass response with horn-loaded impact, making it well suited for festivals, touring systems, high-intensity nightclubs, art cars, and demanding event production.

BassBoss VS21 MK3 Competitive Differences

• Hybrid vented short-horn 6th-order bandpass design for both low-frequency extension and punch
• Single 21" neodymium woofer with 2500W Class-D amplification
• 28 Hz to 100 Hz frequency response with up to 138 dB peak SPL
• 96 kHz DSP with eight push-button presets and up to 100 storable presets via LAN control
• Braced Baltic birch enclosure with waterproof finish, coated woofer, and Neutrik powerCON True1 TOP connection

BassBoss VS21 MK3 Description

BassBoss VS21 MK3 adds serious sub-bass output to professional sound systems while maintaining the transient punch associated with horn-loaded designs. The cabinet uses a massive-displacement, long-excursion 21" woofer that is rear-loaded into a large low-tuned acoustical volume and front-loaded onto a short horn.

This hybrid design allows the vented enclosure section to provide extended low-frequency performance while the horn section increases upper-bass sensitivity and improves transient response. The result is a subwoofer that delivers both deep, liquid lows and hard-hitting impact for live production, dance music, touring rigs, clubs, and outdoor systems.

The 2500W Class-D amplifier features an autosensing globally compatible power supply for 100 to 240 VAC operation. High peak-output voltage supports intense SPL hits, while sustained amplifier output helps maintain strong low-frequency performance during demanding program material.

The BassBoss VS21 MK3 includes comprehensive 96 kHz DSP with high-pass filters, low-pass filters, tuning presets, and multiple protection systems. Five levels of protection help prevent thermal overload, clipping, and excessive excursion while allowing the subwoofer to deliver peak output safely with minimal audible effect on transient response.

Built from braced Baltic birch plywood with polyurethane and steel components, the VS21 MK3 is made for professional deployment. Waterproof mains connectors, coated woofer materials, a durable waterproof finish, eight handles, multiple pole sockets, and M10 fly points support demanding mobile, installed, and outdoor applications.

VS21 MK3 Features

• Powered single 21" subwoofer
• Hybrid vented short-horn 6th-order bandpass enclosure
• 2500W Class-D amplifier
• 21" neodymium woofer with 4.5" voice coil
• 28 Hz to 100 Hz frequency response
• 138 dB peak SPL
• 135 dB continuous SPL
• Integrated 96 kHz DSP
• Eight push-button presets
• Storage capacity for up to 100 presets
• User settings, venue settings, and voicing modes via optional software
• High-pass filters, low-pass filters, equalization, and limiting
• Five levels of protection for thermal, excursion, and clipping control
• Dual etherCON/RJ45 network ports for Ethernet and Milan AVB connectivity
• Universal 100 to 240 VAC power input
• Neutrik powerCON True1 TOP power connection
• Braced Baltic birch plywood construction
• Waterproof finish with coated woofer
• Eight integrated handles
• Four 35 mm pole sockets
• Sixteen M10 fly points
• Includes Neutrik powerCON True1 power cable

VS21 MK3 Specifications

• Speaker Type: Active Subwoofer
• Enclosure Type: Bandpass
• Total Output Power: 2500W
• Amplifier Class: Class-D
• LF Driver: 1 x 21" Woofer
• LF Voice Coil: 4.5" (11.4 cm)
• Magnet Type: Neodymium
• Frequency Response: 28 Hz to 100 Hz (±3 dB)
• Maximum SPL: 138 dB Peak / 135 dB Continuous
• Digital Signal Processing: User Settings, Venue Settings, Voicing Modes
• Dynamic Processing: Limiter
• Audio Input: 1 x XLR 3-Pin Line Input
• Audio Output: 1 x XLR 3-Pin Line Thru
• Network I/O: 2 x etherCON/RJ45 Ethernet/Milan AVB
• USB I/O: No
• Wireless: No
• Mobile App Compatible: No
• AC Input Power: 100 to 240 VAC, 50/60 Hz
• AC Power I/O: 1 x powerCON TRUE1 Input
• Current Consumption: 4.6 A at 120 VAC / 2.3 A at 240 VAC
• Color: Black
• Mounting: Stand Mount
• Pole Sockets: 4 x 35 mm
• Suspension Points: 16 x M10 Fly Points
• Handles: 8
• Construction Material: Plywood, Polyurethane, Steel
• Dimensions: 36 x 36 x 24 in (91.4 x 91.4 x 61 cm)
• Weight: 180 lb (81.6 kg)

What's In The Box

• BassBoss VS21 MK3 Powered Subwoofer
• Neutrik powerCON True1 Power Cable
• User Documentation