Subwoofer Crossover & Phase Alignment Calculator
Subwoofer Crossover & Phase Baseline
Set your high-pass / low-pass crossover roughly 1.25× to 1.4× above your main speakers’ rated −3 dB point (F3) (typically 80 Hz for bookshelf monitors or 60 Hz for large floorstanders). Because sound travels 1.125 ft per millisecond, any physical distance difference or subwoofer DSP latency shifts acoustic phase at the crossover frequency and should be compensated via phase angle or AVR subwoofer distance.
80 Hz Crossover • 142° Phase Offset (or 16.4 ft AVR Sub Distance)
24 dB/oct Linkwitz-Riley LPF • 5.72 ms total subwoofer delay relative to main speakers
80 Hz
Recommended Crossover
24 dB/oct
Target Filter Slope (LR4)
142°
Phase Angle (180° Switch)
+5.72 ms
Total Sub Arrival Lag
16.4 ft
AVR Sub Distance Setting
14.1 ft
Wavelength at Crossover
Crossover Frequency vs. Phase Angle & Wavelength Table
| AVR Crossover Setting | 360° Wavelength | 180° Null Distance | Phase Shift for Your Offset | Integration Fit |
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