Subwoofer

Manifacturer Warranty
Our brands provide full warranty coverage on all listed products.
Tech Support
We provide system support to dealers and installers by offering product guidance, installation and wiring, product troubleshooting, and control programming to ensure optimal performance.
Free Demo
Dealers and installers can book a demo to experience the products in our showroom and learn more.
Training
Dealers and installers receive training on product specs and programming controls to enable effective and convenient distribution. Dealers and installers will be well prepared to meet their clients' needs and expectations.
Specs
True Specifications
At BASSBOSS, with the MK3 line we have stopped using “Peak” and “RMS” power ratings for our amplifiers because those numbers alone are not an accurate representation of the real-world performance you can expect from our powered loudspeaker systems.
Peak Watts:
Essentially a theoretical maximum that the amplifiers could output for an instantaneous moment under ideal conditions with no load.
However, this peak power is not sustainable and has little practical relevance for how the loudspeakers will actually perform.
RMS (root mean square) Watts:
A measure of continuous power output, but even this figure doesn’t account for the true efficiency of how that power is converted into acoustic output by the transducers and overall speaker design.
The number of watts a loudspeaker “uses” is constantly fluctuating based on the impedance curve, frequency response, and heat generated in the voice coils.
Simply looking at how many watts an amplifier can produce on a test bench doesn’t translate to its real-world sound output capability.
What matters most is the complete integrated loudspeaker system and how efficiently it can convert the amplifier’s power into acoustic output while maintaining flat frequency response and headroom. Two loudspeakers with the same wattage ratings could have vastly different real-world sound pressure levels and clarity.
For these reasons, we believe wattage ratings alone are not a reliable metric. Listening tests and measurements of the overall system’s output capabilities like maximum SPL and distortion are far more telling than any peak or RMS wattage number viewed in isolation.
Our goal is to provide outstanding performance through intelligent system design, not just big wattage numbers.
Loudspeaker Description
Specification | Details |
|---|---|
Loudspeaker type | Single 21″ self-powered 6th-order hybrid subwoofer |
Part number | BB-VS21-MK3 |
Acoustic Performance
Specification | Details |
|---|---|
Frequency response / ±3dB | 28Hz–100Hz |
Maximum sustained output | 135dB SPL @ 1m half-space |
Max SPL / Peak | 138dB SPL @ 1m half-space |
Nominal dispersion / H × V | 360° × 360° |
Cardioid mode | Available with multiple boxes |
Amplification & Processing
Specification | Details |
|---|---|
Amplification | 2500W Class D |
Processing | Integrated comprehensive DSP |
Sampling rate | 96kHz |
Presets | 8 pushbutton presets |
Preset storage | Up to 100 presets |
DSP features | High pass filters, low pass filters, phase alignment, equalization and multi-stage limiting |
Electrical
Specification | Details |
|---|---|
Electrical input connector / Amp | Neutrik powerCON TRUE1 TOP IP65-rated waterproof connectors with pass-through outlet to connect additional loudspeakers |
Inlet capacity | Limited to 15A or 1800W @ 120V total |
Electrical outlet connector / Amp | Neutrik powerCON TRUE1 female |
Outlet capacity | Limited to 10A or 1200W @ 120V |
Electrical connector mains | Standard US 3-pin grounding 120V electrical plug: NEMA 5-15 / Edison |
Voltage operating range | 100–240V AC, 50–60Hz |
Power supply | Auto-sensing, auto-switching universal supply |
Current draw / 120V | 4.6A nominal |
Current draw / 240V | 2.3A nominal |
Signal Connectivity
Specification | Details |
|---|---|
Signal input connector | XLR-F |
Signal output connector | XLR-M |
Signal output type | Direct pass-through only |
Enclosure & Transducer
Specification | Details |
|---|---|
Enclosure type | Vented, short-horn hybrid |
Low frequency transducer | 1 × 21″ / 540mm neodymium motor woofer |
Voice coil | 4.5″ / 115mm |
Cabinet Construction & Finish
Specification | Details |
|---|---|
Cabinet construction | CNC-machined 18mm Baltic birch plywood |
Cabinet reinforcement | Extensive bracing and dado joinery |
Pole sockets | 4 × 35mm pole sockets |
Handles | 8 integrated handles |
Feet | 12 rubber feet |
Interlocking foot pockets | 8 |
Flypoints | 6 × M10 threaded flypoints |
Exterior finish | High-pressure bonded polyurea coating |
Finish properties | Rugged, waterproof |
Available color | Textured black |
Grille | Perforated, powder-coated steel |
Dimensions & Weight
Specification | Details |
|---|---|
Dimensions / H × W × D | 36″ × 24″ × 36″ |
Dimensions / metric | 91.44 × 60.96 × 91.44cm |
Height with feet | 37.5″ / 95.25cm |
Net weight | 180 lbs / 82kg |
Shipping weight | 210 lbs / 104kg |
Included Items
Item | Details |
|---|---|
Loudspeaker | Included |
Power cable | 15′ / 5m power cable |
Documentation | Manual, warranty card |
Optional Accessories
Accessory | Details |
|---|---|
Optional cover | Heavy-duty padded nylon transport cover / vertical |
Optional dolly / Version V | Birch plywood flat cart with 4 locking wheels and sockets to accept cabinet feet; transports 1 cabinet |
Optional dolly / Version H | Birch plywood flat cart with 4 locking wheels and sockets to accept cabinet feet; transports up to 3 cabinets |
Optional hardware | M10 shoulder eye bolts, M10 side-pull anchors |
GLL / Ease file | Available from BASSBOSS support |


Sound systems built for extreme bass output and uncompromising sonic power
Sound systems built for extreme bass output and uncompromising sonic power
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