setting crossovers

hey guys u have a pioneer deh-p5000ub head unit , power acoustic pwm 19 equalizer and Audiobahn A8002V Amp: 2-Channel  i will be using the am for my pioneer TWS 256c 10 inch suboofer. what would be the best crossover setting because all three equipents have crossovers i done know how to set em.

Also i would like to know how would set the over all systerm crossover HPF for the speaker and tweeters.

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dre

having the type of speakers would help.

I would use the EQ to set the xover settings of each channel IMO

what I like to use is find the frequency response in hertz of the speakers themselves and then set the HP filter to 5 hz or so above the low frequency the speaker is capable of playing. If you have slope on the EQ then you could put it at 24 or 30 to cut the frequencies hard below whatever you set the hp xover to. This keeps the speaker from playing frequencies out of its range. or you could set the hp filter higher up hertz wise and use a softer slope like an 18 or a 12 or even a 6 its really personal preference here...listen to it and find out what you like.

the sub it says is capable of producing 18 to 600 hz. You could set the HP filter for it at around 22hz with a steep slope like 30 or 24 and you could set the LP filter technically at 590 with a steep slope too. I have noticed the higher frequencies that a sub can play can make the bass muddy because it is playing too much into the midbass category so if it was me I would set the LP filter at 200 with a mild slope 6 or 12 or 18. Play around with it.

Type of music makes a difference too. I have noticed with rap setting the LP filter lower to around 100 or so produces tighter bass IMO. With rock I noticed 200 for the LP filter seems to fit better.

key is try to keep each speaker playing in its frequency range. overlapping frequencies a little is fine but might cause a staging problem if you overlap too much. Did in my system at least.

Also most tweeters I think should be around HP filter: 8 khz / LP filter: 20-22 khz depending on brand. Play around with it and tune it to your preference.

or for SPL tweeters HP: 3 khz LP: 20-22 khz

this is my experience some people might have a different preference.

Good luck!

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also if your EQ lacks enough channels to crossover all of your speakers how you would like you might have to use the EQ for some of them and then the amp for some of them. Usually the amp is capable of doing an okay job on the sub but sometimes lacks slope control or have a set slope.

I use my processor to set the Xover for all the channels of all my speakers but using the amp for some and the eq for others is fine. I would trust the EQ to xover duty over the amps IMO



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05 mazda tribute: H/U Alpine IVA W-505/A pillar BA Neo Type M's/Doors 2xBA SL-85's/subs 2xBA G5 10's w/passive radiators/Proc Alpine PXA-701/Amps JL 300/4v2&1000/1v2 Power 4 gauge/200amp alt

dred]< wrote:

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>hey guys u have a pioneer deh-p5000ub head unit , power acoustic pwm 19 equalizer and Audiobahn A8002V Amp: 2-Channel  i will be using the am for my pioneer TWS 256c 10 inch suboofer. what would be the best crossover setting because all three equipents have crossovers i done know how to set em.

Also i would like to know how would set the over all systerm crossover HPF for the speaker and tweeters.

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Your crossover settings are dependent on the speakers you ar using.  What are they?  Are you planning an all-active system, or do you really mean you need a good point for the subwoofer LPF and the main speakers HPF?

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hey thanks alot guys for the help really appreaciated it . DYohn yeah i need a good HPF and LPF point. oh my speakers are Eminence beta 8A 8" midrange the suckers are loud.

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dre

I recommend setting your subwoofer LP and your mains HP both at 80 Hz.

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ok thanks a lot man

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dre

oh hey guys my EQ power acoustic PWM-19 how should i set the volume control? is the volume control control the amount of volts the rca plug output? becus i have see a lot of  EQs wid out the volume control. What is it really forrr?

what does 20db headroom mean?

does having ah 18db eq better?

How does the xover slopes affect music?

HELPP thanks again for the help guys greatt

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dre

volume control is just that, it controls the overall output level of whatever you have going through the eq.

the 18db is the slope. generally the higher the slope the better because it will not affect the bands around it as much.



in the pic where the lines start to go down notice that they intersect eachother. so when you turn one band up or down it has a small effect on the bands around it as well. a larger slope means that the slope of the line is sharper which reduces how much the lines overlap each other. if you slope is not as large its ok, you just need to know how to compensate. if you increase one band up then you should decrease the bands around it by just a little bit to keep them at the same level you had them. understand?

the crossover slope is basically the same thing except lets say you set the crossover point at 80hz, this will not just cut the frequency off at 80hz, it just begins to roll off at whatever slope it is designed to use. so even though you set it at 80hz you will still get some frequencies past 80hz (more or less depending on if it is high pass or low pass) but the output past 80hz will be less and less as you on according to how steep the slope is. in this case you want a high of a slope as you can get so you can be sure if you set the crossover at a certain point that not too much past that point will get to your speakers .

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thanks mane good info cheers

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dre

"Also most tweeters I think should be around HP filter: 8 khz / LP filter:"

This is just incorrect. The specs for the tweeter determine the X-over freq. and slope. Second the type of midrange or mid/bass also has a factor. If you have a 6" mid that rolls off at 5K, what's the purpose of crossing the tweeter at 8K? The concept is to blend the drivers together. Selection and placement play a key roll here. This where those speaker response graphs play into buying speakers. 1.8k to 4K is not uncommon. Slopes from 6db to 24db. These numbers change with different applications. Good luck finding that 22Khz LP.

"what I like to use is find the frequency response in hertz of the speakers themselves and then set the HP filter to 5 hz or so above the low frequency the speaker is capable of playing."

Again incorrect. A HPF or Subsonic filter is to keep a ported box from bottoming out the driver(s)or power being wasted trying to reproduce non audible frequencies. The Tuning of the box will determine how high or low the frequency will be. You can have a 1K watt 15" ported with a 300W amp that can blow by unloading the cone below the tuning frequency. Add cheezy "bass boost" or a jacked up EQ setting with the same result.

"Type of music makes a difference too. I have noticed with rap setting the LP filter lower to around 100 or so produces tighter bass IMO. With rock I noticed 200 for the LP filter seems to fit better."

A properly setup system should play music equally at moderate volumes. If you have selected your speakers/amp correctly, you have matched your gains and have placement right, your system should be balanced enough to enjoy any music you throw at it. How loud will said music be played? SPL or SQ? All gear has it's limits. Choices need to be made based on desires and budget. Crossover selection can
provide some safety from blown drivers but so can common sense.

"key is try to keep each speaker playing in its frequency range. overlapping frequencies a little is fine..."

If you are overlapping freqs that much something is not set correctly or have made poor driver choices. A driver might have a wide freq response by not always desirable. Larger drivers become beamy at higher hz. Not always desireable inside a vehicle. You don't want crossover points in the sensitive vocal range.

oh thanks again guys. i wanna know  i am using a head unit with LPF ranging from 50 to 125  an  EQ with a built sub crossover ranging from 30hz to 200hz and an amp with a LPF ranging from 40 to 120hz. How do i Set my LPF wid the different equipment. 

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dre

well in this case, since you have so many devices with a low pass option it only matters which one is set the lowest. if you have one set at lets say 80hz and another one set at 120hz, the dominant one will be the device set at 80hz. if it was a high pass filter it would be the other way around. so choose which one is lowest and if you can disable all the others because having a bunch of low pass filters on the same signal is completely redundant.

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thanks soundsecurity will fiddle wid mah setting u the best manee thanks once agen

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dre

hey was jus wonder if my EQ is a 18db roll off and my amp is 12db will i get the benefits of the higher roll off from the EQ. how does the difference with EQ and amp roll off db affect music?

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dre

yeah I know the subsonic filter is to cut out inaudible frequencies...must have done a typo.

mostly just giving him my opinion on some things I had messed around with. I was guessing on the tweeter frequency range since he didnt provide any specs on his tweeters.

Glad you guys chimed in and gave him a more technical run down. My suggestions were just from personal experience.

I just messed with the crossovers until it sounded right for my taste and making sure I didnt go above or below the frequency response of the drivers I have.

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05 mazda tribute: H/U Alpine IVA W-505/A pillar BA Neo Type M's/Doors 2xBA SL-85's/subs 2xBA G5 10's w/passive radiators/Proc Alpine PXA-701/Amps JL 300/4v2&1000/1v2 Power 4 gauge/200amp alt