Introducing the FIR Filter Designer — a precision tool for generating FIR (Finite Impulse Response) correction filters from Room EQ Wizard measurements, specifically designed for the MiniDSP 2×4HD.

What It Does

Upload a REW .dat measurement file from your subwoofer, and the system designs a custom FIR equalization filter that flattens your room response. Export the coefficients directly in MiniDSP-compatible format and load them into your processor.

Features

• REW .dat Import — Parses frequency, magnitude, and phase data from Room EQ Wizard measurements
• Interactive Filter Design — Adjust taps (63–1490), cutoff frequencies, gain limits, rolloff slopes, and window functions in real-time
• Live Visualization — Three chart views: measured response, filter correction curve, and corrected result (measurement + filter)
• MiniDSP Export — Downloads coefficients in .data format (ready for MiniDSP Configuration Utility), plus .csv and .txt alternatives
• 48kHz / 1490-tap Support — Full resolution matching the MiniDSP 2×4HD hardware limits

How to Use

1. Take a measurement of your subwoofer with Room EQ Wizard (swept sine recommended)
2. Export as .dat file
3. Upload to FIR Designer, adjust parameters, click "Design FIR Filter"
4. Review the corrected response chart
5. Download the .data file and import into MiniDSP Configuration Utility → FIR tab

Try it: FIR Filter Designer