Phase Response Graphs

Illustration in preparation Description: Phase vs frequency graph showing: gradual linear phase rotation (good), phase wrapping (normal at extremes), abrupt phase jump at a crossover (potential issue), smooth through-band behavior

Phase is displayed in degrees, wrapping between +180° and -180°. Don't be alarmed by wrapping — it's normal. The shape and rate of change matter more than the absolute value.

Smooth phase: Gradual, continuous rotation. Indicates minimum-phase system with no anomalies.

Abrupt phase jumps: Sudden 90–180° discontinuities at specific frequencies. Often indicates cancellation, a problem crossover setting, or driver reversal.

Phase at crossover: Expect 90° shift per crossover order. An LR4 (24 dB/octave) crossover produces 360° total shift — both drivers in same effective polarity at crossover.