FIR Designer 2

FIR Designer is an application for creating finite impulse response (FIR) filters and mixed IIR/FIR filtering solutions for loudspeakers.
The filters can be loaded into any FIR capable speaker processor or amplifier.

Create loudspeaker tunings/presets with specific magnitude and phase characteristics.

Match different makes and models of loudspeakers in install systems.

Perform system/room correction.


  • Intuitive, fast workflow from impulse response import through to filter coefficient export
  • Continuous filter calculation and error display as parameters are updated
  • Two workflows
    • FIR filter design from a loudspeaker measurement
    • Direct FIR design, without a measurement
  • FIR only or mixed IIR & FIR design
  • FIR Filter sample rates: 12, 24, 44.1, 48, 96 and 192 kHz
  • IIR filters (unlimited)
    • Bandpass, low and high shelf
    • Low-pass and high-pass Bessel, Butterworth, Chebyshev I & II, Elliptic, Linkwitz/Riley & Neville Thiele notched crossover.
  • FIR filter design
    • Magnitude Adjustment using common filter prototypes, above, and with minimum, linear and maximum phase options.
    • Phase Adjustment using minimum-phase and maximum-phase all-pass filters, and a unique 4th order all-pass parametric phase filter
    • Automatic magnitude correction with smoothing
    • Automatic phase correction with smoothing
    • EQ Voicing (post target) using common filter prototypes
    • Unlimited filter prototypes and automatic correction frequency bands
  • Target responses:
    • User-defined parametric magnitude target with low frequency shelf and unlimited slope segments,
    • Impulse response target from file (with options to use magnitude only or magnitude and phase), or
    • Both user-defined and file responses combined.
  • Use coherence in automatic magnitude and phase correction algorithms
  • Import measurement resampling. (Measure at one sample rate and export filters at any sample rate.)
  • Second View: an additional window for any workflow plot, which can be viewed on the primary display or on a different monitor/display.
  • Continuous Wavelet Transform display for time/frequency impulse response analysis.
  • Comprehensive range of impulse response file formats (TXT – magnitude/phase/coherence, TXT – samples, WAV, STO – SysTune Overlay, TRF – SMAART Trace, ETM – Easera measurement, and more)
  • Multiple export formats compatible with most processors and amplifiers (including Powersoft, BSS, miniDSP, EV/Dynacord, Linea Research and more)
  • Integrated Measurement Averaging
    • Load up to 200 measurements of any type
    • Multiple level matching options
    • Auto time alignment with manual adjustment
    • Four averaging modes: Complex, Power (flat phase), Power (minimum phase) and Power (minimum phase + reference excess phase)
  • Moveable license: deactivate and reactivate on another computer.
Compare FIR Designer & FIR Creator features on our Product Comparison Table.






Measurement Averaging (up to 200 files)

Continuous Wavelet Transform Display

Continuous Wavelet Transform Display

Target File with Non-flat Phase

Direct Design Mode