Engineered to deliver explosive impact from the smallest space possible, this single loudspeaker covers the entire audible spectrum. The Krakatoa focuses its output of seismic bass, crystal-clear highs, and everything in between, from a single point.
Kicks Some Serious Ash
Start with four 18" subs in a sixth-order band-pass enclosure for high impact and extended depth. Add an 18" mid-bass driver in a sealed enclosure for tight control. Right through the middle, fire a very serious mid-high horn with a state-of-the-art co-axial compression driver to provide pristine, high-efficiency high-frequencies.
Seismic Sound
The Krakatoa delivers all sounds seamlessly from a single point. This ensures the most naturally realistic listening experience that a loudspeaker can produce. Practically eliminating phase interference affords superior sound localization, which allows more precise imaging, immersing listeners in an immense, sharply focused sound field. This is the real immersive.
Volcanic Volume
The Krakatoa is a true full range – from deep, powerful bass to crisp highs, delivering every note with clarity and precision. Its 4-way design assigns each frequency range to dedicated drivers, reducing distortion and ensuring balanced, dynamic sound even at high volumes. How big does it sound? If you hear it before you see it, you won't believe how small it is...
You'll Lava It!
The Stack-a-Toa combines the Kraken Quad 21” Subwoofer, the Makara Double 21” Subwoofer, and the Krakatoa into a vertically stacked powerhouse of sound, delivering massive SPL from a remarkably small “dance stack” design.
Specification Details
Loudspeaker Description - 4-Way Quintuple 18” Powered Co-axial Point Source Full Range
Frequency Response (±3 dB) - 25 - 19,000Hz
Maximum Sustained Output - 142 dB 1m (half-space)
Max SPL (Peak)* - 145 dB 1m (full-space)
Nominal Dispersion (H° x V°) - 60 x 40 (25 down, 15 up)
Amplification - 7500W Class D, 5000W LF, 1600W MLF, 600W MHF, 300W HF
Processing - Integrated comprehensive DSP. 96kHz sampling rate with 8 pushbutton presets. All presets include high pass filters, low pass filters, phase alignment, equalization and multi-stage limiting. Storage capacity for up to 100 presets
Electrical Connector Amp - Neutrik powerCON True 1 TOP IP65 rated waterproof connectors
Electrical Connector Mains - USA 3-pin grounding 120V electrical plug: NEMA 5-15; Outside USA alternate connectors provided
Voltage Operating Range - 100-240V AC, 50-60Hz (Auto-sensing, auto switching universal supply)
Current Draw 120V - 13.75A (nominal)
Current Draw 240V - 7A (nominal)
Signal Input Connector - XLR-F
Signal Output Connector - XLR-M (direct pass-through only)
Enclosure Type - 4-Way Full-Range Single Axis Point Source. Vented Short-Horn (6th order) Low Frequency section, Co-axially positioned acoustic suspension Mid-Bass section with a Co-axially horn-loaded Midrange and High Frequency section through its center.
Transducer Low Frequency - 4 x 18 in. diameter (450mm) neodymium motor woofers with 4 in. (100mm) voice coils, waterproof cones
Transducer Mid Frequency - 18 in. diameter (450mm) neodymium motor bass driver with 4” (100mm) voice coil
Transducer High Frequency - Co-axial compression driver featuring a 4 in. (100mm) diameter Ring diaphragm midrange and a co-axially positioned 2.5” (64mm) voice coil ring diaphragm tweeter exiting via a 2” (51mm) throat horn mounted through the center of the 18” Woofer’s pole piece
Cabinet Construction - CNC machined 18mm Birch plywood with extensive bracing and dado joinery. 16 M10 fly-points. 8 Steel bar handles. 8 Interlocking UHMWPE Sliders.
Exterior Finish - High-pressure, bonded polyurea coating. Rugged, waterproof. Textured black
Grille - Perforated, powder-coated steel
Dimensions (HxWxD) - 48 in. x 48 in. x 36 in.
Net Weight - 470 lbs. (213 kg)
Shipping Weight - 560 lbs. (254 kg)
What's Included - Loudspeaker, 15’ (5m) Power Cable, Manual, Warranty Card
Optional Covers - Heavy-duty padded nylon transport cover
Optional Dollies - Birch plywood flat cart with 4 locking wheels and recesses to accept the cabinet sliders. Transports 1 or 2 cabinets
Optional Hardware - M10 Shoulder Eye Bolts, M10 Side-Pull anchors
Part Number - BB-KRAKATOA-MK3
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.
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