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SSP118-MKII 18" Powered Subwoofer

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Response down to 30Hz and sustained SPL of 130 dB.

Taking low-frequency reinforcement to the next level for mobile DJs and small venues, this single 18″ powered subwoofer cranks out brutal bass that's more on par with a dual 18″. With low frequency output down to 30Hz, this portable enclosure punches well above its weight.

The heartbeat of the SSP118-MKII active subwoofer is a potent, highly efficient Class-D power module that generates 2,400W RMS, allowing it to hit those ultra-deep frequencies and deliver sustained output up to 130 dB. Simply put, the SSP118-MKII subwoofer offers the SPL of two, three and in some cases four mass-market subs, with low-frequency output its competitors can't touch—all in a compact package that fits into a hatchback.

BASSBOSS was born out of a passion for ultra-deep low-end, and a belief that tight, clean, accurate bass is the foundation of great sound. Each BASSBOSS product is a mindfully engineered, painstakingly tuned, completely integrated audio system, intended to seamlessly pair with other BASSBOSS products. BASSBOSS products are designed, built and hand-assembled in Austin, Texas, using only premium components. Like its siblings in the BASSBOSS lineup, the SSP118-MKII 18" subwoofer is optimized for full-power usage. That is to say, it's intended to be pushed hard and abused, gig after gig. So, don't hold back, crank it up and feel the bass in your bones. Bass is good for you, your audience and your music.

Built to withstand the rigors of repeated gigging, the DJ21S powered subwoofer is constructed from 18 mm Baltic Birch plywood, using dado joints, screws and advanced composite adhesives. Stainless steel bolts are used to secure the driver, amplifier and pole sockets. The cabinet is finished in an extremely rugged, black polyurethane coating. The SSP118-MKII's driver is protected by a black powder-coated, perforated steel grill, and the amp is recessed into the back of the cabinet for protection from damage.

Complementing the SSP118-MKII's virtually indestructible design is a 18" driver that's also built to take a beating. The woofer cone is waterproofed to protect it from accidental exposure to moisture, such as rain or spilled beverages. The added benefit of a waterproof cone is that you can clean the driver with a damp cloth in the event it becomes soiled.

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. 2,400W of continuous power ensures the amp isn’t the limiting factor in the output of low frequencies, and prevents overheating issues and virtually eliminates the damage that clipping an underpowered amp can cause. BASSBOSS specs reflect what the products will achieve, consistently, in the real world—since the real world is where you’ll be using your gear.


  • Rugged construction with 15 mm wooden enclosure
  • Single 18" driver with waterproof cone
  • Class-D amplification with 2,400W RMS output
  • Ultra-deep response down to 30Hz
  • Designed and built by hand in the U.S.A.

Keep your bass-hungry audience satisfied—order today.


SSP118-MKII 18" Powered Subwoofer Specifications:

Speaker Configuration
  • Active/passive: Active
  • Type: Subwoofer
  • LF driver: 18"
  • MF driver: Not applicable
  • HF driver: Not applicable
  • Amplifier class: D
  • Wattage: 2,400W
  • Mixer/preamp: Not applicable
  • Frequency response: 30Hz-100Hz
  • Coverage pattern: 360°
  • Peak SPL: 136 dB
  • Continuous SPL: 130 dB
  • XLR: 1
  • TRS: Not applicable
  • TS: Not applicable
  • RCA: Not applicable
  • SPEAKON: Not applicable
  • XLR: 1
  • TRS: Not applicable
  • TS: Not applicable
  • RCA: Not applicable
  • SPEAKON: Not applicable
  • Cabinet material: 15 mm Baltic Birch plywood
  • Width: 30"
  • Height: 22.5"
  • Depth: 24"
  • Weight: 125 lb.
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