Unity Audio The Boulder MKIII Monitor (Pair)


Unity Audio The Boulder MKII Monitor (Pair)



The Boulder Mk III

True giant killers

The Boulder MKII 3-way active monitor redefines expected levels of sonic performance and is regarded as a truly world-class monitoring system. Like the critically acclaimed MKI model, the MKIII’s boast a fast, accurate detailed sound and prodigious extended bass response, and deliver even greater levels of SPL to fit into any critical listening environment or scenario.


Regarded as easily rivaling many larger and more costly monitoring systems, The Boulders incorporate four discrete bi-polar low feedback amplifiers from The Rock MKII. With the power delivery of the custom Class A/B amplifier at their disposal, The Boulders deliver a life-like sense of scale and take any performance in their stride.


The Boulders are fitted with two 220mm SEAS custom Aluminum woofers that provide tremendous bass precision down to 32Hz and beyond. The unique coaxial mid-range tweeter driver works as a point source over 7 octaves and delivers linear amplitude and phase independent of frequency. This results in incredibly detailed, accurate imaging you can trust.

Sealed cabinet

To accommodate the large 220mm woofers the sealed cabinet uses Baltic Birch plywood and a huge 30mm Corian front baffle with large radius edges to reduce reflection and cabinet resonances.


The Boulders can be expanded with dedicated Boulder Bass Extenders or partnered with an Avalanche Sub-woofer to make a 2.1 or 5.1 system and can even be used with Rocks due to the consistent sonic signature.

The Boulder Mk III specifications

• 2x 8.5″/ 220mm Crystal Membrane Woofer,
• Coaxial 5″ mid range & 50kHz Folded Ribbon Tweeter.
• Sealed Baltic Birch 18mm Plywood Cabinet
• Corian 30mm Front Baffle Design.
• 2x Custom discrete Class A/B Amplifiers inc PSU for MF & HF
Coaxial drive unit.
• 2x 300 watt Class D amplifiers inc PSU for LF woofers
• 390mm D x 268mm W x 614mm H
• 28Kg each



Unity Audio

Additional information

Additional information



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