Cyclonix Passive

Cyclonix Passive

  • Incredibly efficient for maximum output
  • 18″ driver with extra-long excursion
  • Heavily braced enclosure

Experience bass like never before. Pair the Cyclonix Passive with a power amplifier to bring low frequency extension and impact to your dedicated room.

Cinema Black

Available finish

“The bass had a depth and power that was quite staggering”

– Audio Esoterica Magazine

“The bass had a depth and power that was quite staggering”

– Audio Esoterica Magazine


Hear every on-screen rumble or explosion with the Cyclonix Passive, as it recreates the lowest possible audible frequencies for the ultimate cinema experience at home.


For those who prefer a subwoofer with no built-in amplifier, the Cyclonix Passive provides a passive subwoofer experience, using a high excursion bass driver mounted in a high quality MDF enclosure. The proprietary Krix ‘X’ brace system is used to eliminate panel resonances.


The giant 455mm bass driver features a 100mm voice coil, powerful vented magnetic circuit and double spider assembly. The optimum cooling system provides fast heat exchange and reduced thermal power compression.


The dual front-vented enclosure is tuned to achieve maximum output, resulting in an incredibly efficient subwoofer for high drive level applications, while the unit’s proprietary Krix rubber feet provide improved acoustic isolation on hard and soft floor surfaces.


A separate power amplifier is also required for this subwoofer and can be connected to the LFE output of any AV processor or receiver.


For the ultimate cinema experience at home, play it through Krix.


Frequency Range
20Hz-250Hz in room response

Amplifier Power
250 – 1400 Watts RMS recommended amplifier power

127dB maximum SPL in room response

200 amp proprietary terminal posts, accepting up to 6mm diameter cable

Enclosure Type
Bass reflex, front firing vents

1200mm high x 670mm wide x 405mm deep

Low Frequency Driver
Single 455mm (18”) paper cone driver. 100mm (4”) edge-wound copper voice coil, dual spider assembly and vented magnet assembly

100dB SPL – 2.83V at 1m


62kg each

… it was more like wind than mere bass; we could swear the air pressure blew back our hair

– Jez Ford [Sound+Image Magazine]

Best Buys Audio & AV Magazine


For a real ‘cinema sound’ at home, it makes sense to use similar technology to the real thing, to get the experience as close as possible. But why compromise on ‘close’? The Krix Series SX range is the real thing, scaled down to fit within the constraints of the home. It proved monumental in its ability to deliver soundtracks at full throttle, yet delicate and sophisticated enough to play music at the heights of realism. Simply superb.

Sound+ Image Awards 2016 – Custom Installation Product of the Year


Series SX are a home cinema fan’s dream. Built for multiple installation applications, these highly sensitive speakers can fill your dedicated room with spine-tingling, gut-wrenching cinema sound. Sound+Image Magazine agreed, and awarded the range the Custom Installation Product of the Year.