When multiple microphones are used to pick up the same sound source (such as multiple microphones for piano recording), phase differences between frequency bands can cause sound cancellation or a hollow sound.
The tonal characteristics (such as warmth/coolness, softness/hardness) of the power amplifier and the wall-mounted soundbox should complement each other to avoid a biased tone due to improper power matching.
In a multi-channel system, the impedance and power capacity of the microphone, mic power amplifier, and speaker must be compatible with each other.
In large spaces, the coverage of a single speaker is limited, and multiple devices need to be combined to achieve full coverage.
The dynamic range of an audio signal may be limited by noise or interference, resulting in loss or distortion of signal details.
Designers optimize crossover parameters using data such as frequency response curves and distortion, while also adjusting details based on listening tests.
