* Bass reflex enclosure: A bass reflex enclosure is a type of loudspeaker enclosure that uses a port or vent to enhance the low-frequency response of the speaker. Bass reflex enclosures are often used in home audio speakers and car audio speakers to improve the bass performance.
* Equalizer: An equalizer is an electronic device that can be used to adjust the frequency response of an audio signal. Equalizers can be used to boost or cut specific frequency bands, including the low bass frequencies.
* Loudness compensation: Loudness compensation is a feature on some audio devices that automatically boosts the low bass frequencies at low volume levels. This feature is designed to compensate for the fact that the human ear is less sensitive to low frequencies at low volume levels.