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DJ21S Powered Subwoofer

Move the Earth Beneath Your Feet

BASSBOSS DJ21S Powered Subwoofer


  • Intensely DEEP BASS
  • Surprisingly Small & Light
  • Incredible Output-To-Price Ratio

High-powered single 21″ sub optimized to deliver exceptional value for deep-bass output. Killer low frequency response and intense SPL for the size set this sub above, and below, the rest.

More Info  |  Specs


DJ21S Powered Subwoofer

Bringing the BOOM


“Loco Mojo” = Crazy Movement!

With performance down to 24 Hz, the DJ21S will move the floor beneath you, along with everyone and everything in the room. For DJs and venues seeking extremely deep bass at very high levels, the DJ21S is the smallest, lightest and most cost-effective solution available. Suitable for the truly bass-insatiable, whose focus is on modern music that features frequencies well below the usual 40-50Hz range.

This extremely compact subwoofer weighs only 138 lbs and delivers output down to 24Hz (-3dB). The DJ21S is +2.5dB at 30 Hz while most subs are -10dB at 30 Hz.

That’s an equivalent output ratio of 4:1 at the lowest notes – and other mobile subs don’t get anywhere near this deep. Nothing else on the market of this size comes close – guaranteed. So you can buy four mass-market subs that cost more, weigh more, take up more space, and don’t blow people away… or use just one DJ21S.

Don't hold back!

BASSBOSS subs are optimized for full-power usage.

Multiple proprietary protection technologies ensure that the woofers remain within their excursion and thermal limits, so they don't break or burn like other subs. BASSBOSS provides much higher levels of deep bass than mass-market subs, reliably.

With plenty of headroom to keep up with the most enthusiastic crowd and not run out of bass.

So turn it up, and keep it up. BASS is good for you.

BASSBOSS not responsible for noise complaints.


Hand-Built Cabinets

BASSBOSS DJ21S Powered SubwooferThe DJ21S cabinet is a vented enclosure that is tuned to optimize extremely low frequency output using a very large port. It was designed specifically to minimize materials cost and weight, and maximize efficiency.

Able to effortlessly reproduce the lowest notes in modern music. With frequency response down to 24 Hz, you can guarantee that you will hear, and feel, the deepest frequencies.

BASSBOSS cabinets are hand-built in the USA. They are constructed from 18mm Baltic Birch plywood, using dado joints, screws and advanced composite adhesives.

Created to stand up to intense usage. The cabinet is finished in an extremely rugged, black polyurethane coating. Drivers are protected by a black powdercoated, perforated steel grill, and the amp is recessed into the back of the cabinet for protection.

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.

Rugged Drivers

All that electrical power is converted into acoustical energy by a 21 inch neodymium motor woofer. This premium-quality driver features a split-wound 4.5 inch 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 woofer cones are waterproofed. BASSBOSS woofers can survive light rain, spilled drinks and dusty environments that may leave the drivers needing a thorough cleaning. Keep the amplifiers dry and party on!

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.

True Specifications

BASSBOSS DJ21S Powered Subwoofer Response GraphBASSBOSS 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. 

Read more about BASSBOSS Designer David Lee’s specifications philosophy on ProSoundNetwork.


This is the Magic Subwoofer I’ve been longing for!

My obsession with quality sound and extraordinarily physical bass began at a very young age, I dreamt that one day I would discover the “Magic Subwoofer.” I have always been the guy that has to reduce the bass because my subwoofers would begin to smell burnt after a few minutes of use, I’m talking about all the common mass market subs.

Right off the delivery truck, I had 3 DJ21S near full volume and the physical impact was True Lee breathtaking. Later on I turned it up to full volume, and after about 2 hours of pounding I noticed that there was no burnt voice coil smell at all. That’s a first. I also realized right away that I wasn’t craving more bass, I am finally satisfied. That’s also a first for me. The back of the amps were slightly warm to the touch. My old sub amps would have been hot. The depth is unreal. It sounds like “big concert bass”.

A wise man told me “Nothing is without a cost, you have to give to get.” This is for all the mobile DJ and one man show professionals who have the logical concern about transporting and loading gear of this caliber. Yes, it’s heavy. When comparing a 140 lbs BASSBOSS to a 90 lbs mass market sub, the increase in impact and performance hugely outweighs the increase in weight and this makes it totally worth gigging with the BASSBOSS.

Amazing sound, worth every cent!

Excellent team and superb customer service, You won’t waste a penny for this amazing speaker!

A True SUBwoofer on a totally different level

BASSBOSS brings the power of those massive concert subwoofers, that cost $18,000 each and weigh 300 lbs, down to a manageable size, weight and price for people like us. Seriously, these BASSBOSS rank up there with the concert products that are 5x more expensive, thats why they destroy the mass market “subs” that weigh 90lbs. Those things are like regular woofers compared to the BASSBOSS that is a True SUBwoofer on a totally different level.

I’m 5’8, 150lbs and have no trouble lifting, loading and transporting all 3 of my DJ21S subs. Check out my Instagram for BASSBOSS videos: DJKineticKev. The transport platforms are necessary and built to perfection, they roll so nicely.

Build quality is top notch, the enclosures are military grade. I would recommend these to the touring professionals, mobile 1 man show, and even the home listener that craves Liquid Bass. I especially suggest BASSBOSS for clubs and party spaces. The cost to performance is unmatched.

I am happy to give product demonstrations in the the Tri-State area, Philly, Jersey and Delaware. Inquire through Insta: DJKineticKev 



Loudspeaker Description High-output Single 21 inch Subwoofer
Frequency Response (±3 dB) 24 – 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
Electrical Connectors, Amplifier Neutrik powerCON Input (Blue) NAC3FCA
Electrical Connector, Mains Standard US 3-pin 120V electrical plug: NEMA 5-15 (Edison)
Voltage Operating Range 90-132VAC, 55-65Hz
Current Draw, Nominal 360 W, 3A @ 120 volts (typical, 1/8 max power)
Signal Input Connector XLR-F
Signal Output Connector XLR-M (pass-through only)


Enclosure Type Direct radiating, vented enclosure, optimally tuned for high sensitivity at extremely low frequencies
Transducer 1 x 21 in. diameter (530 mm) neodymium motor woofer with 4.5 in. (115 mm) copper-clad aluminum winding voice coil and 60 mm (2.36″) peak to peak excursion. Waterproof fiber composite cone
Cabinet Construction 18 mm Baltic Birch plywood. Equipped with 2 integrated handles, 1 pole socket, and 4 rubber feet
Dimensions (HxWxD) 35 in. x 24 in. x 24 in. (35.75 in. high with feet)
Net Weight 138 lbs
Shipping Weight 160 lbs
Exterior Finish Rugged, weatherproof, black textured, bonded high-pressure polyurethane coating
Grill Perforated, powder-coated steel
Pole Sockets 1 (35 mm)
Handles 2 Integrated Handles


Transport Dollies Dolly cart, requires 4-part assembly, holds one box for transporting 1 cabinet
Covers Heavy-duty padded nylon transport cover for 1 cabinet

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.


DJ21S Powered Subwoofer

BASSBOSS DJ21S Powered Subwoofer

The "Loco Mojo" Subwoofer. A high-powered, self-amplified single 21" sub that's optimized to deliver exceptional value for low-frequency output.


Contact us for assistance!


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Want to finance a dream system in easy monthly installments? Apply here.

Have questions regarding financing BASSBOSS gear?
Give us a call - we're happy to help.

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When you slice up your payments with Klarna, you will know exactly how much you pay each month and in total. You’ll get an instant decision on whether you're approved with just simple information - no bank account or credit card required. Click here to read all the details.

With Klarna, slice up the payment on your purchase!

It’s simple and easy

When you slice up your payments with Klarna, you will know exactly how much you pay each month and in total. You’ll get an instant decision on whether you're approved with just simple information - no bank account or credit card required. Click here to read all the details.

We now accept the Synchrony home card!


Shop again and again at thousands of participating retail locations, for your audio & home needs.*

  • Promotional financing offers** with convenient monthly payments
  • A dedicated credit line for home purchases (flooring, furniture, appliances, electronics and more)
  • No annual fee for new accounts
  • Special sales events and savings offers* from participating retailers
  • $0 fraud liability
  • 24/7 secure, online account management tools

*Subject to credit approval **Participating locations


Synchrony Home Card Main Page | Synchrony Home Card Application Page

BASSBOSS offers financing through industry leader Hampton Ridge Financial.

Ideal if you are NOT running an existing audio-business. Click here to apply.

Financing for equipment purchases of $3,000+ Click here to apply.


  • 60 days to pay with no interest!
  • Convert to a 12 month loan or pay off in 60 days
  • Get started in minutes, no obligation
  • Apply with a business checking account, not your credit score

Pay now or pay over time with PayPal Credit. Just use PayPal Credit in PayPal checkout.

No Interest if paid in full in 6 months on purchases of $99 or more.

✛ Synchrony Home Offer – cannot be combined with any other offers or prior quotes, interest is deferred during the promotional period, the entire finance amount must be paid by the end of the promotional period to avoid finance charges, not valid on dealer sales, additional terms and conditions may apply. Please contact our sales team for details and sales assistance.


BASSBOSS custom-designed covers protect your Subs and keep them looking new for years to come. Made in the USA, covered by an unconditional lifetime warranty. Keep your investment protected from gig wear and tear.


BASSBOSS Custom Cover for ZV18 Powered Subwoofer

Add your company logo to your custom covers. Silk screening of your logo available on all custom covers.


Silk-Screened Customer Logo for Speaker Covers

Custom Fit Wheel Dolly Cart made of Baltic birch, bed liner coated, with extra heavy duty locking swivel casters.


Custom Wheel Carts for All Subs


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