VS21 21″ Powered Sub
“Rum Punch”: Sweet,
Strong, Intoxicating
US$4,595.00
Extended
Depth
Satisfy your demands for hard-hitting live kicks to the rolling bass of an 808 with a horn/vented design hybrid, single 21″ VS21 Powered Subwoofer. Ideal for shows spanning genres that need intense dance-floor coverage.
High
Intensity
Hits
Versatility that covers every genre, with massive punch and plenty of heft. Excellent transient response is delivered by the efficient performance of the horn at the upper end of the subwoofer range.
The resulting impression is a very big, heavy hit. Extended depth is delivered by the large acoustical volume, low tuning and the massive displacement of the long-excursion 21″ woofer.
Design
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 hornloaded subwoofers.
The VS21 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, the VS21 offers both.
Versatility
The VS21 is particularly versatile, able to satisfy the demands of hard-hitting live kick drums to the deep, rolling bass of an 808. For those whose shows span a lot of genres, the VS21 has got them all covered.
The same size and shape as the Cerwin Vega L-36, the VS21 will deliver considerably much more output and deep bass. The VS21 is a vented, short horn hybrid single 21” powered and processed subwoofer. Frequency response ±3dB from 25-90Hz. Maximum continuous sine wave output 132dB.
Features
The VS21 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.
Benefits
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.
Processing
Powered by a 2400W RMS amplifier, the VS21 includes all the necessary electronics to allow it to be connected directly to your mixer with nothing but signal cable in between. The built-in processing is minimal and includes a low-pass filter that provides a broad, flat frequency response.
There is no need for any EQ in the signal. In addition, a sophisticated limiter system protects the woofer from thermal and over-excursion damage, allowing the user to get maximum output from the loudspeaker for as long as necessary without concern about overdriving it.
Tech Specs
 |
 |
 |
| Loudspeaker Description | High-output Single 21 inch Subwoofer |
| Frequency Response (±3 dB) | 25 – 90 Hz |
| Maximum Sustained Output | 132 dB SPL, 1 meter, half-space (ground plane) |
| Max SPL (Peak)* | 139 dB |
| Nominal Dispersion (H° x V°) | 360 x 360 – Cardioid Mode Available with Multiple Boxes |
| Amplification | 2400 Watt Continuous RMS Class D Subwoofer Amplifier |
| Processing | Integrated comprehensive DSP provides high pass, low pass, phase alignment and limiting |
| Enclosure Type | Vented, short-horn hybrid |
| Transducer | 1 x 21 inch diameter (540 mm) neodymium motor woofer with 58 mm (2.28″) peak to peak excursion. Waterproof fiber composite cone |
| Cabinet Construction | 18mm Baltic Birch plywood, dado joints, stainless steel hardware |
| Dimensions (HxWxD) | 36 in. x 24 in. x 36 in. (37.5 in. high with feet) |
| Net Weight | 180 lbs |
| Shipping Weight | 230 lbs |
Loudspeaker, manual, and power cable included.
True Specifications
BASSBOSS technical specs are based on measurements of continuous performance in normal usage. Other manufacturers may specify output based on calculations rather than measurements; measurements outside the operating bandwidth; or on ‘Burst’ or ‘Peak’ readings.
BASSBOSS specifications are conservative compared to most manufacturers. They reflect what the products will achieve, consistently, in the real world. Since the real world is where you’ll be using your gear.
Our proactive philosophy causes specifications to be subject to change whenever improvements are made.
*Peak output is calculated using “industry standard” techniques. These calculation methods create theoretical specifications that are inflated over what can actually be achieved. BASSBOSS real world output specifications are provided as “Maximum Sustained Output” ratings, which reflect actual measured, continuous output levels.
Deep Dive
Hand-Built Cabinets
The VS21 is a vented short horn hybrid single 21″ subwoofer. It is 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.
BASSBOSS cabinets are hand-assembled in the USA. Constructed from 18mm Baltic Birch plywood, using dado joints, screws and advanced composite adhesives.
A top-mounted pole socket in each VS21 provides for mid-high loudspeakers to be mounted on a straight speaker pole above the subwoofer. The enclosures feature four large rubber feet on the bottom and four on each side, with corresponding recesses in the opposite side to facilitate interlocking the boxes when stacked.
Arrays of multiple boxes combine to devastating effect. With rubber feet on 4 sides, the VS21 can be stacked and interlocked in blocks of 4, 6 or 8 boxes with the horn sections coupled for increased impact. The feet on the bottom and back lock into the V transport carts and the feet on the sides lock into the H transport carts.
The VS21s can also serve as a ground-support platform for the LA88 Line Array. (With optional hardware.) The VS21 is an extremely versatile loudspeaker not only for multiple applications and genres but for expansion as well. Start with 2 and grow to 32, there’s nothing you won’t be able to do.
Optional Suspension Hardware. 16 X 3/8 -16tpi M10 Threaded Flypoints.
Prodigious Amplification
A 2400W RMS amplifier with integrated, comprehensive DSP is included. The amplifier is rated for RMS output using continuous sine wave signal.
This is not a Peak or Burst power rating. BASSBOSS uses only continuous RMS power ratings because you’re not going to be using your sub in millisecond bursts. For subwoofer applications, Peak and Burst power ratings are largely irrelevant.
The amplifier is capable of delivering 2400W of continuous output. This ensures the amp isn’t the limiting factor in the output of low frequencies. Providing abundant power prevents overheating issues and virtually eliminates the damage that clipping a too-small amp can cause.
For larger events, several arraying options are available. Block arrays, side-by-side arrays and front/back Cardioid arrays can be deployed securely thanks to the interlocking feet. Presets are included in the DSP.
Rugged Drivers
All that electrical power is converted into acoustical energy by a 21″ Neodymium motor woofer. This premium-quality, driver features split-wound 4.5″ 4-layer copper-clad aluminum voice coil, and peak-to-peak excursion capability of up to 60 mm.
High-intensity Neodymium magnets are lighter and provide higher efficiency so the result is a lighter and louder cabinet. Split-wound coils produce a more linear force through the range of movement of the cone, which results in lower distortion and improved linearity at high output.
The cones are waterproofed to protect them from possible, accidental exposure to moisture such as rain or spilled beverages. Waterproofed woofer cones also permit the cleaning of drivers that have been soiled in a dirty or dusty environment with the use of a damp cloth. Keep the amplifiers dry and party on!
Waterproofed cones in all products. Optional weatherized and weather resistant loudspeakers have the same acoustical performance as our standard options. If your system is likely to be exposed to rain, ask about IP rated amplification options. If you have need of a system for outdoor installation, ask about Weatherized products.
Focused Tuning
BASSBOSS subs can be connected directly to your mixer with nothing but signal cable in between. The built-in processing is comprehensive and yet minimal manipulation is applied to the signal. The processing includes only a high pass filter and a low-pass filter. There is no need for any EQ in the signal for the speaker to provide a broad, flat frequency response. A sophisticated limiter system protects the woofer from thermal and over-excursion damage.
Plug-and play with peace of mind. Multiple, sophisticated protection systems make the loudspeaker virtually indestructible. You can turn on and turn up, all night, without fear of over-driving to the point of damage.
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