Head Unit LPF or US Acoustic 2x100 LPF?

[v10king]

Hello,

I have a Pioneer DEH-P47H which is a Chrysler specific headunit. Anyways I am running the stock speakers up front on the HU power. I just got a Kicker Solobaric 8" and Us Acoustic 2x100 to power it. It sounds real nice. It's for my Jeep so I needed as little space as possible (.45) I have two questions I hope some of you can hlpe me with.

1. My headunit has a low pass filter on it that is either 125, 80, 50 hz. My Us Acoustic amp has a LPF. Which should I use? Is one a better quaility filter. I think the 2x100 is a 24db?

2. What should I set the LPF at for the sub (Kicker Solobaric L5 8" in sealed enclosurem down firing)?

Thanks in advance.

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[ChefJoe 10+ year member]

use both filters. barring any signal quality loss (shouldn't get any) you'll end up with an even sharper drop off.

As for frequency, people say start at 80 for a 12" and then slowly work your way up (while listening to your favorite music). It's all about a balance with how low you want your car to boom at (yes, the sub can do the filter at 120 hz, but it's likely to sound like a bunch of buzzing if you're listening to things with tons of low frequencies).