Hi/Low Pass Filter Settings

[RSQJEEP 10+ year member]

Set up my gain using the JL Audio tutorial's test tune method. Now my system sounds flat and I can barely hear the sub. I played around with the crossovers, but not sure that I have gotten the setting right. What should I set the amp's hi and low crossovers at based on the speakers capabilities? Thanks in advance for the help and LMK what other info you need to help me out!

Amp: Eclipse EA4000

Adj Hi Pass 18 dB octave: 30-500 Hz

Adj Low Pass 18 dB octave: 50-500 Hz

Front Speakers: 5 1/4" Infinity Kappa Component Speakers

Sensitivity 94 dB

Frequency Response: 55 - 25k Hz

RMS Power Range (Watts) 2-85

Peak Power Handling (Watts) 255

Impedance (Ohms) 2

Rear Speakers: 6 1/2" Infinitu Kappa 3-way speakers

Sensitivity 90 dB at 2.83 volts

Frequency Response 45 - 22k Hz

RMS Power Range (Watts) 2-75

Peak Power Handling (Watts) 225

Impedance (Ohms) 4

Sub Amp: Kicker mono ZX 400.1

10" JL Audio Dual Voice Coil Sub(10w3v2-D4)

300 w cont

Dual 4 ohm

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[IMOVeCHICKENS! 10+ year member]

bump cuz peeps tell my to use the ****ing search button instead of helping ....

 

[DidUHearThat? 10+ year member]

Try this.

Front speakers: High pass @ 80 hz

Rear speakers: High pass @ 100 hz

Subs: Low pass @ 60 hz

If you have a Sub sonic filter: 15 hz

Start there, and make minor adjustments to taste and listen for speaker, cabinet or mount distorting/sounding bad.

 

[DidUHearThat? 10+ year member]

Raising the HP crossover point on the front and rear speakers will give you more power handling, reduce low frequency distortion (in the main speakers) and generally get louder. Downside is you may be cutting off frequencies that are not being played by either your main speakers or subs. Creating a "whole" in your sound and make your subs not blend as well with your system.

Lowering the crossover point on your main speakers will improve fidelity and bass output of the main speakers and blend better with the subs. Downside is your reducing power handling ability and increasing low freq distortion in them at higher volumes. Low freq resonace of the door skins becomes more apparent.

For the subs raising the x-over point improves your mid/bass performance and takes more stress off the main speakers to perform at those frequencies. Downside it makes them more directional. You will notice the sound comming from the rear more and they won't blend as well into the system. It also increases the resonance of the sub box and you will "hear" the box "voicing" at lower volumes. That's bad.

Lowering the subs x-over point makes for tighter cleaner bass that is less directional and is easier on the cabinet. Downside is your putting more stress on the main speakers to perform more bass duties and creating a whole in the sound that won't let the subs blend as well into the system.

You want to find a compromise between these extremes that sounds best to you in your car with your gear.

 

[IMOVeCHICKENS! 10+ year member]

i have a lpf on my speaker amp for my mid range speakers what should i set it at?

 

[DidUHearThat? 10+ year member]

i have a lpf on my speaker amp for my mid range speakers what should i set it at?

:facepalm:

Did you read what I posted above?

You don't use a LPF on mid/hi speakers. LPF = Low Pass filter. It allows the "Lows to pass". It blocks the highs. That's bad.

You want a HPF = High Pass filter. It will block the sub/bass from distorting your mid/high speakers.

Subwoofers use a LPF (allows the "lows to pass"). Mid/high speakers use a HPF (allows the "highs to pass").