Mordant Short Subwoofer

This world debut follows the introduction of a stunning new twin driver subwoofer and elegant dedicated center channel. The Performance 9 sub incorporates two sizeable 10" long-throw drivers, powered by a phenomenal 1000W of power (2 x 500W).

The drivers embrace Mordaunt-Short's proprietary Continuous Profile Cone technology. This uninterrupted aluminum cone surface offers excellent rigidity and therefore minimal distortion, even with the design's very long excursion capabilities.

The two drivers are mounted within an ultra rigid, cast steel chassis assembly which is coupled directly to the floor and completely isolated from the enclosure. The cabinet is suspended around the transducer assembly, acting as a solid containment to the air volume. The substantial 1" thick MDF cabinet incorporates a double flare port (which is a solid design to effectively reduce the two-way port noise) to reach the very lowest frequencies.

[DAY1_004001] Each 10" driver is powered by its own 500W IcePower module. Maximum theoretical efficiency is roughly 50%, but in reality at average signal levels it tends to be more like 3 or 4%. The rest is lost as heat. This means amplifiers are often large, bulky affairs with massive heat sinks. By switching the electrical supply on and off 400,000 times a second, IcePower modules dramatically reduce heat loss and therefore increase efficiency. This allows the Performance 9 to deliver its 1000W power output.

In the subwoofer, you'll also find second generation ARC technology. Active Room Control (ARC) was developed by Mordaunt-Short to help deliver better subwoofer performance by eliminating the most troublesome room resonance (mode) using the supplied test CD and a Sound Pressure Level (SPL) meter.
Mint condition!!

Performance 9 takes ARC forward by not only letting you adjust the frequency cut off point and depth of the cut, but also letting you vary the width (Q) across the frequency range. Moreover, Mordaunt-Short has gone so far as to develop a proprietary computer program (found on the test CD) to make sure you get the perfect ARC settings. You simply feed in your test disc results and the application displays the correct notch filter settings.