The Avalanche Active Sub-Woofer
Power and Control
The Avalanche active sub-woofer is
primarily designed to compliment our
existing Rock and Boulder models,
seamlessly transforming them into
full range 3-way and 4-way systems
and extending their low frequency
performance down to an incredible
22Hz. It is also the perfect 2.1 or 5.1
partner in a surround-sound setup to
The Rocks and Boulders.
The Avalanche uses a downward
firing 300mm woofer, designed
exclusively for heavy-duty sub-woofer
applications. The input circuitry uses
two balanced XLR inputs feeding
Burr Brown op amps to maintain the
best possible quality audio signal
which passes through to the satellite
The Avalanche retains the sealed
cabinet design approach but features
a dual-chamber with an Aperiodic
Vent. This delivers all the benefits of
a sealed cabinet such as zero port
noise and tight fast accurate bass
reproduction. It also significantly
increases the bass response available
from a smaller cabinet design.
"Sonically, the Avalanche is very clean and quiet, with very low
harmonic distortion and no audible noise. It fills in the lowest octaves
without compromising midrange clarity. It is immensely powerful and clean-sounding."
Sound on Sound
Two Unity Audio low frequency custom discrete Class A/B amplifiers running in
parallel delivering an effortless 150 watts are mounted on rubber isolation mounts.
User controls consist of Level, 180-degree phase switch, bypass switch, and a switched
rotary satellite crossover frequency selector. Two factory presets are provided for
teaming up with The Rock or Boulder. In addition, both Low Pass 4th order filter and
High Pass 2nd order filters can be set independently in Vari Mode. A bypass footswitch
is also included to allow users to switch the sub-woofer in or out of circuit.