A crossover is a device that splits an audio signal into two or more frequency bands. This is useful for directing different frequency bands to different speakers or amplifiers, which can improve the overall sound quality of a system.
The crossover frequency is the frequency at which the signal is split. For example, an 80Hz crossover would split the signal into two bands: one band below 80Hz and one band above 80Hz. The low-frequency band would then be sent to a subwoofer, while the high-frequency band would be sent to the main speakers.
80Hz Crossover
The 80Hz crossover is the most common crossover frequency for home theater systems. It is a good compromise between reproducing low frequencies and avoiding localization of the subwoofer.
Advantages of 80Hz Crossover
- Better reproduction of low frequencies: The 80Hz crossover allows the subwoofer to reproduce lower frequencies than a 90Hz crossover. This is because the subwoofer is specifically designed to reproduce low frequencies.
- Reduced localization of the subwoofer: The 80Hz crossover makes it more difficult to localize the subwoofer. This is because the subwoofer is reproducing lower frequencies, which are less directional than higher frequencies.
Disadvantages of 80Hz Crossover
- Some subwoofers may not be able to reproduce frequencies below 80Hz: Some subwoofers are not designed to reproduce frequencies below 80Hz. If you use an 80Hz crossover with one of these subwoofers, you will not be able to reproduce the lowest frequencies in your music or movies.
- Some people may prefer a more localized subwoofer: Some people prefer to be able to localize the subwoofer. This is because they want to feel the bass coming from a specific location in the room.
90Hz Crossover
The 90Hz crossover is less common than the 80Hz crossover, but it can be a good choice for some systems.
Advantages of 90Hz Crossover
- Subwoofers can reproduce a wider range of frequencies: The 90Hz crossover allows the subwoofer to reproduce a wider range of frequencies than an 80Hz crossover. This is because the subwoofer is reproducing more high-frequency content.
- Subwoofer is more localized: The 90Hz crossover makes it easier to localize the subwoofer. This is because the subwoofer is reproducing higher frequencies, which are more directional than lower frequencies.
Disadvantages of 90Hz Crossover
- Subwoofer may not be able to reproduce the lowest frequencies: The 90Hz crossover may not allow the subwoofer to reproduce the lowest frequencies in your music or movies. This is because the subwoofer is not reproducing as much low-frequency content as it would with an 80Hz crossover.
- Some people may not prefer a localized subwoofer: Some people do not prefer to be able to localize the subwoofer. This is because they do not want to feel the bass coming from a specific location in the room.
Conclusion
The best crossover frequency for your system will depend on a number of factors, including the type of speakers you are using, the size of your room, and your personal preferences. If you are not sure which crossover frequency to use, start with 80Hz and experiment from there.
Here are some additional things to consider when choosing a crossover frequency:
- The type of music you listen to: If you listen to music with a lot of bass, such as hip hop or electronic music, you may want to use a lower crossover frequency. This will allow the subwoofer to reproduce the low frequencies in your music more accurately.
- The size of your room: If you have a small room, you may want to use a higher crossover frequency. This is because the subwoofer will be more localized in a small room.
- Your personal preferences: Some people prefer a more localized subwoofer, while others prefer a more diffuse subwoofer. Ultimately, the best crossover frequency for you is the one that sounds best to you.
Recommendation
If you are looking for a crossover frequency that is a good compromise between reproducing low frequencies and avoiding localization of the subwoofer, then I recommend using an 80Hz crossover. However, if you have a system that can benefit from a wider range of frequencies or if you prefer a more localized subwoofer, then you may want to consider using a 90Hz crossover.
