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Multi-Way Conventional loudspeakers with crossovers

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Old 20th April 2004, 10:11 AM   #1
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Default cross over & box design & simulation software

sorry to annoy anyone on here (I am sure this is a duplicate post) but i still havent found what i'm looking for....

I am building a three way system (two sealed enclosures) and I have just about purchased all my drivers (I have chosen the same / similar driver as other proven systems) but I am having difficutly with the cross over and box design & simulation.

I dont really want to spend any money on the software (i'll only be using it once!) but I dont want to design the cross over from scratch (I have managed to get ahold of a couple of cross over designs that will only need slight modification as I am using a slightly different tweeter).

Basically I want to do the following:

1) Key in my three drive units parameters (tweeter, midrange & woofer)
2) Key in one of the cross over designs
3) Key in my box metrics (current guesses).

and then:

4) Run a frrequency respence
5) Tweek the cross over / box size
6) repeat 4 & 5 until happy.

Can anyone help ?

Thanks

Mark.Carline@btinternet.com
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Old 20th April 2004, 01:18 PM   #2
Hans L is offline Hans L  Netherlands
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Have a look at LDSG - Summary of recommended system design software

Cheers.
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Old 20th April 2004, 03:54 PM   #3
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Hmm you'll only use it once. For some reason I dont think that will be the case. I think that once you build one good set of loudspeakers you'l probably at one point want to build more.

Either way LSPcad is very good.
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Old 20th April 2004, 04:01 PM   #4
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Default LSPcad

Hmm...LSPcad costs though...

Unless anyone fancies running my crossovers, drivers and boxes though their copy ??

Thanks

Mark.carline@btinternet.com
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Old 20th April 2004, 04:08 PM   #5
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I'm using Speaker Workshop. It's free, and not too hard to use once you figure it out. I also used SPL Trace to generate frequency and impedance response files in the format that Speaker Workshop needs (FRD and ZMA). So far all I've done is model potential crossovers - Speaker Workshop can be used to take measurements too, but I haven't done that yet.
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Old 20th April 2004, 04:18 PM   #6
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Default Speaker Workshop

I must admit that I did install and try and use Speaker Workshop but found it a little confusing.

Perhaps anyone on here thats designed a three way system in two sealed enclosures could email me their saved Speaker Workshop files so I can see what they have done?

I am wanted to remodel a cross over for similar design (I am using slightly different box, tweeters and woofer units) to the one featured in the following link:

http://www.lautsprechershop.de/hifi/triga.htm

It does look like a very good program, just hard to get to grips with.

Thanks!!

Mark.Carline@btinternet.com
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Old 20th April 2004, 04:37 PM   #7
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I installed it and gave up in frustration at least 5 times before I finally got something going with it. Hang in there, it's not that hard once you figure it out.

Take a look at this thread, it might give you some useful information:

More crossover questions

It contains a brief description of the process I followed to get to this point.
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Old 20th April 2004, 05:12 PM   #8
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Default Speaker Workshop

thanks i'll check that out.

Do you know if I am better off having each of the three crossovers:

1) High pass (tweeter)
2) Bandpass (midrange)
3) Low pass (woofer)

on separate "NETWORK" sheets within Speaker Workshop or am I better off having them all on one ??

I just want to graph the whole system end to end and alter the odd component value - I'm not really interested in some of the automated componet changes that this s/w package can do..
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Old 20th April 2004, 05:44 PM   #9
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I did them on separate network sheets, because the optimizer cannot work with more than one driver. Once I had the individual networks to roughly where I wanted them, I copy-pasted (ctrl-C ctrl-V wworks grea) them all into the same network, made the connections, had it graph the combined output, and then tweaked from there.

I don't know how to include the enclosure's response in with the network's. My setup will be open baffle so the baffle will only affect the lower end of the midrange driver, and all I'm modelling is the midrange-tweeter XO, so I just ignored that.
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