We provide software tools for equalizing audio systems and creating custom finite impulse response (FIR) filters & complete mixed FIR + IIR filter loudspeaker presets for single and multi-way loudspeakers.
Products in the Eclipse Audio range share an intuitive workflow that uses imported loudspeaker measurements as the starting point for filter & preset design.

Our Products

Both macOS and Windows versions of all products are available. Download a free demo version of any product & use for as long as you’d like.

Need help choosing? See the Product Feature Comparison Table

Latest News

Room Tuning With IIRs using FIR Designer

Room Tuning without FIR….?

Posted on
In this step-by-step case study, see how FIR Designer (using averaged measurements captured in Rational Acoustics’ Smaart®) was recently used to tune a system using only IIR filters – no FIRs at all – at a newly-renovated church in Australia.
Biamp in FIR Designer's IIR Reference Editor

Biamp Tesira IIR filter mode added to FIR Designer

Posted on
FIR Designer & FIR Designer M have been newly updated to include a Biamp Tesira IIR filter mode that provides emulation of 48kHz IIR filter behaviour in the Tesira range of Biamp products and aids mixed IIR+FIR Tesira preset creation. … Read More

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