SSP118-MKII Single 18″ Powered Sub

It’s a Club in a Cab

Specs  |  Top



Deep Bass
Fills the Room

For Mobile Professionals who provide superior sound quality. The SSP118-MKII delivers premium sonic experiences unavailable with other manufacturer’s single 18″. One cabinet will replace 3-4 competing cabinets, for more sound out of less space and cost. Why carry more?


Turn heads when it turns on.

Bad-boy for mobile DJs and small venues, a single 18″ cabinet that delivers like a double 18″. With low frequency output down to 30 Hz and sustained output up to 130 dB, you can easily bring serious bass for mid-size rooms with a single cabinet.


For Mobile Professionals who provide superior sound quality, the SSP118-MKII allows you to deliver premium service with less equipment and labor. With two SSP118-MKII Subwoofers, you will have the output of one of the worlds finest double-18” subwoofers, the BASSBOSS SSP218, divided into two smaller, more manageable pieces.

Optimized for

Optimized for remarkably deep bass response from a cabinet of mobile size, SSP118-MKII Subwoofers are each loaded with a single 18” long-excursion, neodymium motor, low frequency driver. Each driver has a 4” voice coil and is rated for 1500W nominal power handling, 3000W program power handling.


It is practically impossible to blow drivers on the SSP118-MKII, as with all BASSBOSS Subwoofers, due to the combination of extremely rugged, very high power handling, long excursion drivers, carefully optimized cabinet and port design and several effective but transparent protection systems.

The protection systems prevent thermal overload of the voice coils and minimize long-term thermal compression while having virtually no effect on the transient response and peak output of the loudspeakers.

Didn’t event break a sweat

DJ Moses 

The gig over the weekend was great and the sub was even better. I used JBL tops with it and at max volume the sub didn’t event break a sweat… and the JBLs were blinking like it was X-Mas. In most cases, subs can’t keep up with the tops, but in this case I would need to have 2 JBL tops to keep up with one SSP118, and just maybe they may have a fighting chance.

Never heard anything like it.

Kirby Oliveras, Guitar Center Pro

The BASSBOSS SSP118 sub is a little more expensive but, in my 20 plus years in audio, I’ve never heard anything like what they make. They are easily twice as loud as any single sub on the market with a lower USABLE response as well.  I compared this with every other competitor on the market- no one moves as much air. No one.

Extremely tight and articulate response!

Christopher Ashbrook, Katabatik Sound

Hands down nothing touches these for their size. Without a doubt these are twice the punch and loudness of any front firing 18″s I’ve used. Extremely tight and articulate response!


Extremely flat, delivering response that is ±3.0dB from 30Hz to 100Hz. No equalization is required to achieve this response. Unlike designs that require equalization, the SSP118’s tone, response and sensitivity are native to the design. Systems that require processing to achieve their stated response are still subject to the physical excursion and thermal limits of their drivers.

Boosting low frequency EQ to achieve extended low-frequency response results in excessive distortion or woofer damage at full power unless limiting is applied. The limiting necessary to prevent failure also prevents the realization of their claimed frequency response at full power. The SSP118-MKII does not suffer from these limitations. It faithfully delivers the low bass where most others either roll off or die trying.


Finished in extremely durable black textured weatherproof polyurethane coating. A top mounted pole socket in each SSP118-MKII provides for mid-high loudspeakers to be mounted on a straight speaker pole above the subwoofer.

The enclosures also feature four large rubber feet and corresponding recesses in their tops to facilitate interlocking the boxes when stacked. The woofers’ cones are made from a waterproof fiber matrix which can withstand exposure to spills and rain and can be wiped clean with a damp cloth.

Tech Specs

Loudspeaker Description High-output Single 18 inch Subwoofer
Frequency Response (±3 dB) 30 – 100 Hz
Maximum Sustained Output 130 dB SPL, 1 meter, half-space (ground plane)
Max SPL (Peak)* 136 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 Direct radiating, vented enclosure, optimally tuned for low frequency response with high sensitivity and high power handling
Transducer 1 x 18 in. diameter (457 mm) neodymium motor woofer with 4 in. (100 mm) copper winding voice coil and 56 mm (2.2″) peak to peak excursion. Waterproof fiber composite cone
Cabinet Construction 18 mm Baltic Birch plywood, extensive integrated bracing. Equipped with 4 integrated handles, 1 pole socket, 4 large rubber feet, and 4 interlocking foot pockets
Dimensions (HxWxD) 22.5 in. x 30 in. x 24 in. (23.25 in. high with feet)
Net Weight 125 lbs
Shipping Weight 140 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 SSP118-MKII  is a vented, direct radiating single 18″ subwoofer with extensive bracing, easy portability and frequency response that rivals many double-18″ subs. Very large ports maximize low frequency performance at high output. The ports exit outside the perimeter of the woofer grill to minimize air flow noise. The port walls, handles and amplifier recess are all designed to serve as braces in addition to their primary purposes, making the cabinet extremely rigid. The port openings and amplifier recess also offer grab points on the front and rear of the cabinet.

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 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, with corresponding recesses in the opposite side to facilitate interlocking the boxes when stacked.

There are two handles on each side. The amplifier recess is designed to also serve as a handle on the back of the cabinet and the port openings allow lifting from the front.

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 from damage, direct sun and moisture.

Optional Flying Hardware. Includes side-pull anchors and/or shoulder eyebolts and a suspension system with 16 x M10-1.5 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 power by an 18″ neodymium motor woofer. This premium-quality driver features split-wound 4″ copper voice coil, and peak-to-peak excursion capability of up to 56 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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