Krix MX-40i Infrasonic Modular Behind Screen Speaker System

Perfection can take time
Krix speakers are usually made-to-order in South Australia, with construction beginning once your order has been placed. This process ensures great attention to detail is applied to each and every speaker, but it can also take time — sometimes around 2 weeks.
Give us a call
A premium product like this deserves the personal touch, so we would love to speak with you to ensure everything is perfect from start to finish. Please feel free to call us (or visit us in-store) to discuss your new system.
The phenomenal wall of sound from Krix.
Sits behind your acoustically transparent screen.



Krix MX-40i Modular Speaker System
Designed for medium to large dedicated home cinemas with an acoustically transparent screen, the MX-40i will deliver your favourite movie soundtracks with supreme definition and accuracy, right through the picture and into your seat. An experience that goes beyond the audible range.
Featuring commercial cinema components, the Krix MX-40i provides a crisp, clear, realistic sound, with such power and precision it will make your hair stand on end.
Key Features
• Behind screen cinema quality speakers
• High-output 18-inch LF driver for reference-level dynamics and realism
• Reversible sub design with dual terminals for flexible installation
• Designed for large, high-performance home cinemas
• Uniform height, width and slim-line depth for easy integration or upgrade
• Easy to install
• Krix Infinite Baffle Wall
• Massive Dynamic Range
• Australian made
Specifications Sheet (PDF, 2.13MB)
Installation Guide (PDF, 2.70MB)

Feel The Infrasonic Difference
The MX-40i builds on the legacy of Krix’s award-winning MX-40, delivering even greater low-frequency power and extension. While the left, centre and right speaker modules remain unchanged, the MX-40i features new high-performance subwoofer modules, engineered for true infrasonic reproduction with exceptional control, output and realism. Infrasonic performance refers to extremely low frequencies, often below the audible range, that you feel rather than hear.
The Next Generation of Krix Series MX
The latest Series MX speakers have been upgraded to deliver clearer sound, deeper bass and an even more immersive cinema experience at home.
The MX-30i and MX-40i keep their original left, centre and right speakers, but now include powerful new subwoofer modules designed to produce extremely deep, tactile bass you can feel as much as hear.
Infra-bass performance
Reproduces extremely low frequency sounds to create a tactile audio experience that you can feel.
Reversible sub design
Dual terminals allow the subwoofer cabinets to be oriented up or down, ensuring flexibility for any room layout.
Modular design
The MX-40i features five modules, all of which are the same height and slim-line depth for easy installation into one cavity.
Patented horn technology
High frequencies are handled by the Krix patented 90 by 40-degree short throw horn, driven by a high frequency compression driver.
Australian made
Krix has proudly engineered and manufactured speakers in Australia since 1974.

[Optional] MXi-118 Optional Extra Subwoofer Module
Additional matching 18" subwoofers (MXi-118 Infrasonic Subwoofer Module) can be purchased to extend low-frequency performance across multiple room locations - such as the rear wall - while optional spacer modules are also available for flexible installation.
Modular System
In a commercial cinema, sound is heard but not seen, with a wall of speakers driving the dynamic soundtrack directly through the big screen for the ultimate sound experience.
As leading developers of commercial cinema speakers, Krix delivers the cinema sound experience to your home cinema with Series MX. These unique modular behind-screen speaker systems, designed to be installed behind an acoustically transparent screen, will conceal everything but the cinema quality sound.
Combined with matching surround speakers, Series MX truly delivers the excitement, presence and impact of real cinema, at home.
The Krix Infinite Baffle Wall, which has been installed in commercial cinemas since the early 1980s, is also replicated in the MX series. The thick, acoustic absorption material on the front baffle of the speakers minimises reflections and prevents sound leakage behind the screen, for a high energy sound you can feel. For large or cinemascope screens, Krix’s optional low frequency absorption spacer modules can be used in pairs to ensure a wide, realistic soundstage.

Easy To Install
These speaker systems are designed to be installed behind an acoustically transparent screen, just like the speakers in a commercial cinema. They create a wall of sound directly from the picture, so everyone gets the full movie experience and impact. The five speaker modules (left, centre, right and two subwoofers) in each system are all the same height and depth, making the design of the room and installation of the speaker system much simpler.

Control and Definition
These proprietary products have been developed by Krix over a 10 year period using powerful Finite Element Analysis (FEA). Krix patented horn technology provide exceptionally flat frequency response, precise pattern control, and very low distortion. Seamlessly coupled with the dispersion pattern of the woofer, the sound is focused on the audience and away from the walls, resulting in reduced reflections which can muddy the sound.
The specially engineered bass drivers are professional low frequency loudspeakers and offer superb bass performance, high peak program power handling and high efficiency, capable of extreme sound pressure levels. The smooth response, wide frequency and dynamic range are features not often achieved in one woofer. The bass drivers have an oversized ferrite magnet structure with components engineered to achieve maximum efficiency. Symmetrical gap geometry, combined with the large linear voice coil travel, ensures minimum distortion at all levels.
| Model Number | EXT MX-40I.C 01 |
|---|---|
| RRP | 35,995.00 |
| Specs | SYSTEM RECOMMENDATIONSRecommended room depth Minimum screen size 16:9 Minimum screen size 21:9 LCR SPEAKER MODULESFrequency range Power handling LF Power handling HF Sensitivity Impedance Crossover frequency Configuration Low frequency driver Mid and High frequency drivers Input terminals Dimensions Weight SUBWOOFER MODULESFrequency range Power handling Recommended processing Sensitivity Impedance Low frequency driver Dimensions Weight |

5 Year Warranty
All Krix speakers are Australian designed and Australian made.
Krix are so confident in the quality of their products that they provide a 5 Year Warranty with all new Krix speakers.
To claim your warranty, please register your product with Krix within 90 days of the purchase date.
Register with Krix
We offer free post on all orders over $29 to anywhere within the Australian mainland and Tasmania.
Can I pick up my purchase from your store?
Yes. You can usually pick up your order from one of our stores. We recommend that you contact us first to ensure your order is ready for collection.
What happens if I'm not happy with my product when it arrives?
All change of mind returns must be in as new condition, in original packaging. We provide a generous 30-day change-of-mind guarantee on our products (unless otherwise stated). All change of mind returns must be in as new condition, in original packaging.
Please visit our FAQ page for answers to other frequently asked questions or contact us if you have any other questions or comments.