Originally posted by bleh...:
BTW bandpass boxes usually have a narrow freq range of 50-85 hz and lower hz they suffer dramatically, and same with the upper hz. Now what is this cabin gain all about?
Cabin, room, environment gain, [edit]transfer funtion[/edit], all the same idea. In a car, due to its small volume, increases the level of sound by about 12dB/octave going down from about 40-50Hz. So, as the speaker starts rolling off usually in that same range, cabin gain will compensate and you end up with a naturally flat sound.
