Subwoofer in-car

[Potatoman]

My friend has "bass tube" (?) in the boot of his car. He said only really low bass (drum) is loud and bass lines in music is quieter. The low pass filter is set to 120, and there is a GAIN and a BASS BOOST control as well. how can the bass be equalized?

[tomd]

The equaliser can't distinguish between different parts of music, just the frequencies they operate at. You'd need to try and boost the frequencies around 90 - 200 Hz, as even try to cut some of the very bottom end (>50), although take the 90 down to ~60 if your music has very low bass lines. If the gain is specific to the bass woofer alone, as opposed to the whole lot, then turn the bass boost off and turn the gain up. This will raise the level as a whole and take the emphasis off the very bottom end.