Crossover frequency:
Crossover frequency is the value set on an AV receiver at which the amplifier separates high from low frequencies, sending one portion to the standard speakers, and another to the subwoofer (bass). To avoid having a frequency gap, the signals sent to the respective drivers must be able to be produced by them. That means, you can set it based on the frequency range numbers set in the speaker manuals.
Recommendation:
If the subwoofer is not positioned optimally, it is best to set the crossover below 160 Hz, meaning that it will only handle the ultra-deep frequencies the human ear has a hard time placing. One guideline is the THX home cinema standard, which sets it at 80 Hz as long as all satellite speakers can produce tones that low. Crossover frequencies between 80 and 140 Hz are most common because center and rear speakers that can go lower than that are rare due to their smaller size.
Tip: Please consult the user's manual of your speaker system.
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