Crossover Frequency Recommendations?

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luckydevil

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Joined: July 04, 2005

Location: United States

Posted: December 16, 2005 at 3:42 PM / IP Logged

I'm going to make my own passive crossovers and I'm looking for some ideas on where to begin.

Here is what the system is comprised of:

USX2080 -> Infinity 6402cfp 4x6's (4" + tweeter) [2khz+up]

USX2050 -> CDT EF8 [90hz-3khz]

MXA3002 -> JL 6W0's [30hz-90hz]

MXA3002 -> Kicker CVR12 [30hz-90hz]

What do you guys think of the crossover frequencies I have listed?

dwarren

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Joined: December 03, 2004

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Posted: December 16, 2005 at 4:00 PM / IP Logged

Why not use an active crossover(s)?

Like one from this company... http://www.altomobile.com/html/crossovers.html

or a less expensive company like Audiocontrol http://www.mobileaudiocontrol.com/dept.asp?d_id=5251&l1=5251

Active crossovers will aloow you to tailor the system after it is setup to fine tune it. They are used between the head and amps. You've got the extra amp channels, and they are far less power hungry than passives. Let me know if you need help designing this setup.

luckydevil

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Joined: July 04, 2005

Location: United States

Posted: December 16, 2005 at 4:04 PM / IP Logged

I thought about using the Audio Control 6XS, but I don't think it is going to work for me. I would end up having to change a lot of their freq modules.

I'd also like to build my own just to learn more.

The JL 6w0's should be [40hz-90hz].

I can't find that Alto Mobile Drive20 anywhere. Any idea how much that thing costs?

youngone

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Joined: September 28, 2005

Location: United States

Posted: December 16, 2005 at 4:13 PM / IP Logged

for the CDT's i would bring the 90hz down gust a little lower like 80hz or so and adjust the sub accordingly so it rolls of at 80hz. for the jl6w0 i would bring the roll off to about 125hz or a little higher. it would be helpful if you would describe were in the car these speakers are going to be located in the car. you could have a consultation problem with the kicker and the jl. but i don't know if that would be the case other then that it looks good.

Aaron

Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend

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stevdart

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Posted: December 16, 2005 at 4:43 PM / IP Logged

How did you come about selecting the drivers?

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

luckydevil

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Joined: July 04, 2005

Location: United States

Posted: December 16, 2005 at 4:51 PM / IP Logged

I know it is quite an odd combination. I bought most of them before I had good understanding of what is in a good system.

Now I am just trying to get it all to work together and not sound like crap.

stevdart

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Posted: December 16, 2005 at 5:05 PM / IP Logged

You can do one of a couple things: buy a woofer tester and measure the T/S parameters....or use some computer programs to work the crossover out using published data. I use the tools in FRD Consortium, first using SPL Trace to copy the manufacturer's response graph, and then Speaker Workshop to model the crossover.

http://www.pvconsultants.com/audio/frdgroup.htm

This limits you to speakers that actually have a published response graph. Here's an example of what to look for: http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=295-305

For most drivers that are available for speaker-building, you have to go to the manufacturer's web site to find this info...Tang Band has response graphs, for example. And BTW, Trace is time-con-sum-ing!

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

DYohn

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Posted: December 17, 2005 at 12:09 PM / IP Logged

I'd run the mid-bass drivers band-passed between 90Hz and about 240Hz. Low-pass ONE of your subs at 90Hz and remove the other from the system. High-pass your 4X6 mains at 240Hz. A simple 3-way crossover is what you need, and since you are using separate amplifiers use an electronic as it will be far more efficient than trying to build passives.

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Crossover Frequency Recommendations?

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