Adjusting a digital capacitor

I'm pretty sure my alternator is on it way out anyway because I got 4.5 F or protection and I still get light dimming depending on what I play.  A upgrade in alternator was in the plan anyway.  But back to the origional question, on digital capacitors isnt there a Tensiometer or something to adjust the resitance so I can match the cap to whatever my actual voltage reads?  I thougth I saw something like that on my caps but I didnt want to mess with it since I wasnt sure if thats what it was.

If your alternator is only 105 amps and you have a pretty big system (over 500 watts RMS) then your headlights will still dim a little or alot depending how many watts your amp puts out RMS. A bigger alternator should solve your headlight dimming problem.

yea, I'm working on getting a new alternator soon anyway.