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Sydney's Subwoofer Expert

Krix - Cyclonix 18 Series SX - Subwoofer

by Krix

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Experience bass like never before. The Cyclonix Active has an internal amplifier to drive the high excursion woofer, plug in and enjoy. If you are after a serious subwoofer for your theatre look no further.

  • Incredibly efficient for maximum output
  • 18″ driver with extra-long excursion
  • Exclusive Krix digital sub amplifier (KDSA)

With a built-in ICEpower® class D amplifier, the Cylonix Active uses a high excursion bass driver mounted in a high quality MDF enclosure featuring the proprietary Krix ‘X’ brace system 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 built-in ICEpower® class D amplifier also delivers 450 watts RMS.

The dual front-vented enclosure is tuned to achieve maximum output, resulting in an incredibly efficient subwoofer for high drive level applications, while the front mounted control panel with LED display allows for easy adjustment and use. The unit also includes proprietary Krix rubber feet for improved acoustic isolation on hard and soft floor surfaces.

Ask today why 60% of Australian cinema's use Krix cinema speakers. Sydney Hi Fi Mona Vale offers a full custom design and installation service that will give you the absolute best sound coupled with peerless industry service.

Awards for Series SX


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.


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.


Frequency Range

20Hz-250Hz in room response

Amplifier Power

450 Watts RMS


127dB maximum SPL in room response 


Stereo line level RCA. High level binding posts

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

Power On/Off

Adjustable Auto/Always On, 12V trigger setting

Phase Select

0º or 180º

Low Pass Filter

50Hz-200Hz or bypass 


63kg each