Bass and treble frequency settings on an Alpine headunit Options

[GotToyota]

I have an Alpine 9870 headunit with 6.5" Infinity Reference speakers in the front, and whenever certain bass and treble kicks in, there is this distortion, which I feel is to blame from the adjustment of the bass and treble frequencies.

According to my user manual, I can adjust the bass center frequency, bass bandwidth, along with treble center bandwidth, and high pass filter. Here are my choices for each:

Bass center frequency:
80hz-->100hz-->200hz-->60hz-->80hz

"Emphasizes the displayed bass frequency ranges."

Bass bandwidth:
1(narrow)-->2-->3-->4(wide)

"A wider setting will boost a wide range of frequencies above and below the center frequency. A narrower setting will boost only frequencies near the center frequency."

Treble center frequency:
10.0khz-->12.5khz-->15.0khz-->17.5khz-->10.0khz

"Emphasizes the displayed treble frequency ranges."

High pass filter:
80hz-->120hz-->160hz

I think the high pass is only for if you have a subwoofer, so I don't need to adjust it? What settings should I have for everything else, though? I have the Infinity's in the front, and plan on adding some JBL's to the back.

BTW, the sensitivity of these speakers is 93db, and the frequency response is 53 - 21k Hz.

-Matt

This post has been edited by GotToyota: Jun 22, 2008 - 5:23 PM