A digital bi-amp speaker uses two separate amplifiers: one for the low-frequency driver (woofer) and one for the high-frequency driver (tweeter). The signal is split digitally (in the DSP—Digital Signal Processor) before amplification, ensuring precise control over crossover points, EQ, and dynamics for each driver.

The linear phase aspect means the speaker uses FIR (Finite Impulse Response) filters in its DSP to ensure that all frequency components of the sound arrive at the listener in phase—resulting in transparent, time-coherent sound reproduction. This improves clarity, stereo imaging, and impulse response without introducing phase distortion, unlike traditional IIR filters.