Speaker Tools

Speaker Phase Alignment Calculator

Calculate precise phase delay and alignment for your speakers and subwoofers to ensure optimal stereo imaging, bass coherence, and crossover performance.

Calculated Phase Delay & Alignment

-- ms / --°
Formulas & Notes
  • Time Delay (ms): Δt = (D_right - D_left) / 343 × 1000 + Manual Delay
  • Phase Shift (°): Φ = 360 × f × Δt / 1000 where f = crossover frequency in Hz
  • 343 m/s is the approximate speed of sound in air at 20°C.
  • Adjust speaker delays to achieve coherent summing at the listening position and prevent phase cancellation.

How to Use

  • Measure the distance from each speaker to the main listening position.
  • Enter the crossover frequency for subwoofer or main speakers.
  • Optionally, enter any manual delay applied via processor or amplifier.
  • View the calculated phase delay and alignment for optimal sound coherence.

Who Can Use

  • Home theater enthusiasts optimizing speaker alignment
  • PA system and live sound engineers
  • Audio professionals tuning stereo imaging
  • DIY subwoofer and speaker system builders

Where to Use

  • Home theaters and listening rooms
  • Recording or mixing studios
  • Live sound, clubs, and PA systems
  • Car audio systems with subwoofer alignment

FAQs

Phase alignment ensures all speakers reach the listener simultaneously, preventing cancellation and improving stereo imaging and bass coherence.

Use a tape measure from the speaker driver center to the primary listening position. For subwoofers, measure from the acoustic center.

The crossover frequency determines where phase alignment matters most, especially for subwoofer integration and midrange drivers.

Yes, you can calculate phase delay between multiple subwoofers and main speakers to align timing and prevent destructive interference.

Negative delay means one speaker reaches the listener before the reference speaker. Adjust delays to ensure coherent timing.