Loudspeaker Phase Alignment for Even Bass Crossover Response

The patent applies parameter changes by modifying the phase response characteristic of each loudspeaker unit through all-pass filtering. Each loudspeaker's phase response is adjusted individually to match a target phase curve, transforming the phase parameters while maintaining amplitude characteristics. This resolves the contradiction by enabling multiple loudspeakers with different original phase responses to work together coherently in the bass region, improving overall bass capability while maintaining uniform frequency response through the crossover region.

The patent implements universality by creating a common target phase curve that can be applied to any loudspeaker unit regardless of its original characteristics. The all-pass filtering system serves as a universal solution that can process signals for multiple different loudspeaker types, enabling each to contribute to bass reproduction. This allows the system to utilize diverse loudspeaker units with varying bass capabilities while maintaining uniform frequency response, effectively combining the benefits of both identical and diverse speaker configurations.

The patent applies local quality by implementing individualized phase correction for each loudspeaker unit based on its specific characteristics and position. Rather than applying a uniform correction to all speakers, the system measures or determines the phase response of each individual loudspeaker and applies a customized all-pass filter to achieve the target phase curve. This localized approach allows the system to accommodate loudspeakers at different distances and positions while maintaining phase coherence and avoiding cancellations in the listening area.