In-line crossovers?

[bad03ranger 10+ year member]

I bought an amp that has no HP or LP filter on it only a gain and EQ dial are these in-line filters worth using for a sub

http://www.crutchfield.com/p_069900062/F-MODS-100-Hz-low-pass.html?search=In-line+crossovers

is 100-Hz a good range for the subs or should i go lower

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[JimJ 5,000+ posts]

Your head unit doesn't have an LP crossover?

 

[jdawg 5,000+ posts]

im my experience fmods have always lowered the signal level

 

[bad03ranger 10+ year member]

Your head unit doesn't have an LP crossover?

i assume it does alpine cda-105

Sound Tuning

Subwoofer Level: Subwoofer Level Adjustment

High Pass Filter: High Pass Filter Adjustment

Bass Center Frequency: Bass Center Frequency Adjustment

Bass Width: Bass Width Q Adjustment

Bass Level: Bass Level Adjustment

Treble Center Frequency: Treble Center Frequency Adjustment

Treble Level: Treble Level Adjustment

Loudness: Loudness Feature

MediaXpander: MediaXpander Ready (PXA-H100 Required)

Time Correction: Time Correction 6 Channel Time Correction Ready (PXA-H100 Required)

Equalizer: Equalizer 5 Band Graphic / 7 Band Parametric Equalizer Ready (PXA-H100 Required)

Crossover: Crossover Ready OFF/60/80/100 (Hz)

IMPRINT: IMPRINT Sound System Ready (PXA-H100 Required)