eqx 31.5 hz question

[06Sentra 10+ year member]

i notice that when i set the 31.5 hz to -12db the bass is cleaner and/or subs recover faster but with it at 0db the bass is louder and has more of a punch but not as clean. whats the reason for this. dont know if this matters but the crossover chip is the eqx is 33hz.

Click to read more...