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High pass filter ups loudspeaker performance

Posted: 04 Apr 2011     Print Version  Bookmark and Share

Keywords:analogue filter  high pass  high order 

One Systems introduces the SF-4 analogue high pass filter system that offers active filtering for both low impedance systems as well as high impedance/transformer based designs. The ultra-low frequency signal filtering improves loudspeaker reliability, increases power handling and also reduces system distortion.

In addition to audibly improving a loudspeaker's performance, high pass filters substantially increase the power amplifier's headroom by reducing low frequencies that require significant power to reproduce.

The SF-4 occupies a 1RU (1.75inch (44.45mm)) all-metal chassis. The SF-4 is equipped with a very high quality balanced XLR-type input and two parallel balanced XLR-type outputs. The SF-4's user selectable 4th order Butterworth filter frequencies are 35Hz, 45Hz, 60Hz and 80Hz, and were carefully chosen to match the requirements of One Systems speaker models.

All of the SF-4's controls are located on its back panel to minimise tampering with its settings. The unit features an IEC power connector for easy compatibility with local requirements as well as a two-position AC mains selector switch that enables it to work with line voltage/frequency anywhere in the world.

Because the SF-4's analogue circuitry and filtering delivers the necessary infrasonic protection that every speaker needs, it can also be used with other manufacturers systems with the same benefits.

The SF-4 aims to deliver a combination of necessary infrasonic filtering, simple operation, improved sonic performance, system reliability and high value. Its analogue circuitry and low noise claims to complement any sound system.

The SF-4 and other One Systems products will be on display in Hall 8.0, stand # J 70E at prolight+sound 2011 in Frankfurt, Germany.

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