Review

Seismix 3 mk3 Complete Review - The Sydney Morning Herald - Australia

01 Nov 2006

This high powered subwoofer has a clever programmable microprocessor that controls almost all its circuit functions. It allows Krix to include features not often found on subwoofers at this price. One is a circuit that reduces power consumption when the subwoofer is not being used, slashing running costs to less than 10 cents a week.

Another feature is an earth lift button that eliminates mains hum. Unlike most manufacturers, Krix builds its Seismix subs right here in Australia. It sources the 255mm diameter bass driver from Denmark, but makes everything else in its factory in Adelaide.

The In Circuit Serial Programming (ICSP) microprocessor also safeguards against accidental misuse. Soft limiting stops you driving the amplifier’s output stage into harmful clipping. An opto-compressor stops the built in 400 watt amplifier from forcing the cone beyond its design limits.

Recognising that many people hide subwoofers away in places where they can sometimes overheat, Krix has incorporated a heat sensor into the amplifier’s cooling fins.

Unlike most subwoofers , it doesn’t just switch the amplifier off if it gets too hot. It instead slowly reduces the subwoofer’s volume until the temperature drops to a safe level. After a short cool down period, the volume automatically returns to its original setting.

A separate analog filter limits driver excursion at frequencies below human hearing. This helps keep the bass driver’s magnet cool and stops inaudible infrasonic frequencies from modulating and distorting higher frequencies, resulting in excellent tonal quality and foolproof operation.

Deep bass extension is more than adequate and the impressively wide 22Hz to 150Hz frequency range means you can partner this model with small front and surround speakers.

The Seismix 3 Mk3 is not large (415 x 360 x 450mm) but the combination of the big bass driver, powerful amplifier and ICSP micro means it sounds much bigger than it looks.

- The Sydney Morning Herald - Australia , Greg Borrowman

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