BassBoss VS21-MK3 Active Subwoofer Speaker (1x21", 2500 Watts)

Give your PA some gravitas with the VS21-MK3, an enormous 21-inch, 2500-watt PA sub with face-melting air displacement and floor-quaking low-end extension.

The active VS21-MK3 features Punchy AND Full Deep Bass, Very High Output, and Versatility across all genres from a Club Scene to an Acoustical Performance. Its MASSIVE Output is smooth, even, accurate, and clean.

The VS21-MK3 is definitively able to satisfy the demands of hard-hitting live kick drums to the deep, rolling bass of an 808. This vented, short horn hybrid single 21" powered subwoofer has a frequency response of +-3dB from 25-90Hz. The VS21 offers output SPL comparable to a bigger double-18" cabinet and allows more output to be focused forward thanks to its smaller frontal area.

The MK3 series deliverers a suite of updates to the BASSBOSS line, improving clarity, performance, functionality, and safety via the amplifiers, DSP, custom control software, waterproof connectors, and more.

The updated amplifiers + DSP feature much more powerful 96 kHz processors with pristine sound quality and eight touch-of-a-button on board presets. This state-of-the-art Class D amplifier provides a true 2500 Watts of RMS power. The amplifier is truly capable of delivering continuous power, ensuring that it isn't the limiting factor on your quest for low frequency. Additionally, by providing an abundance of power, the possibility of overheating and damage to the woofers caused by clipping is virtually eliminated.

"Control BASSBOSS" software provides additional computer-accessible presets, networked remote control, and future proofing remote DSP update capabilities as BASSBOSS programming read more is developed and released. Each unit features dual ethernet ports with a built-in network switch for computer connectivity and cascading networking ability.

IP65 waterproof connectors have been added to provide peace-of-mind in unpredictable environments, and the MK3 line offers 90-250VAC global power compatibility for use all over the world.

The VS21-MK3 features a massive displacement, long excursion 21" woofer, rear-loaded into a large acoustical volume that is tuned to a low frequency and front-loaded onto a short horn. The vented enclosure section provides extended low frequency performance, and the horn section provides increased upper frequency sensitivity and improved transient response.

These features bring the benefits of extended low frequency together with the benefits of high impact. Excellent transient response is delivered by the efficient performance of the horn at the upper end of the subwoofer range.

Extended depth is delivered by the large acoustical volume, low tuning, and the massive displacement of the long-excursion 21" woofer. The combination provides an immediate hit with the added power of full and effortless low-end extension. The resulting impression is one of a very 'big' or 'heavy' hit.

The design brief for the VS21 was to create a product that offered low-frequency extension similar to the BASSBOSS vented dual 18" subwoofers in combination with the hard-hitting punch of the BASSBOSS horn-loaded subwoofers. The VS21-MK3 brings the world of extended low frequency together with the world of high-impact. You're no longer forced to choose either deep OR punchy, this model offers both.


- Single 21 in. Vented short horn hybrid subwoofer
- 2500W RMS Class D amplifier with integrated signature DSP
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- Frequency response (+-3dB): 25-100hz.
- Dims: 36 in. x 36 in. x 24 in.
- Weight: 180 lbs. 90-250V Operation
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 197 lbs
Shipping Dimensions: 39 x 39 x 27 in
Manufacturer Part Number (MPN): AMS-BB-VS21-MK3

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