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Old 4th November 2010, 02:58 PM   #1
JBdV is offline JBdV  Netherlands
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Default Digital Crossover

I am looking for an available diy project for a digital crossover for loudspeakers.

A Behringer DCX2496 is way too big.

I need only simple low off filter functionality. So hopefully a small unit I can build myself can do the job.

I want to connect this crossover in the digital domain (within the digital loop of my NAD M2)

Any suggestions?
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Old 4th November 2010, 03:11 PM   #2
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What about MiniDSP kit from MiniDSP ?
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Old 4th November 2010, 05:22 PM   #3
JBdV is offline JBdV  Netherlands
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Looks good at first sight, I will investigate it further, Tnx!
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Old 11th December 2010, 11:29 AM   #4
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How does this DSP unit compare to the Behringer or DBX 260 in sound quality. I have some high priced components and dont want to degrade much to get the benefits of DSP.

Anyone use these yet?

Anyone have input on the quality of the parts? A/D D/A chips?

Last edited by SpinMonster; 11th December 2010 at 11:32 AM.
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Old 11th December 2010, 11:39 AM   #5
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If you use the search function for miniDSP you will find that many are very happy with the performance, and there have been direct comparisons with the Behringer unit and also DEQX.
The miniDSP should be a better choice for most people cause it's designed for normal equipment, where the Behringer is designed for much hotter signals, both in and out, and will therefor have a bad S/N with allot of hi-fi type of amps and sources. Also because the miniDSP boards has a limited functionality they are very fast, and reprecent very little delay compared to many other DSP solutions.

For optimum sound quality use digital in, and have an anologue volumecontrol after the DSP. A bit complicated since there aren't many multichannel pre amps (you could build yourself). The miniDSP can controll volume digitally, but with a high gain amplifier and sensitive loudspeakers this could mean that you reduce the bit depth too much, getting bad S/N.

Last edited by FredrikC; 11th December 2010 at 11:44 AM.
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Old 11th December 2010, 12:07 PM   #6
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I dont think the digital in is going to be a step up. I have a Krell KRC3 preamp for volume and a Cambridge Audio Azur 840c CD player that 24/196 plus upconversion. Is this unit on that level? I would use it balanced between the player/preamp.

Thanks for input. I dont really understand digital much.
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Old 11th December 2010, 01:03 PM   #7
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If u use analog in, the DSP is going to do an A/D and then an D/A conversion anyways, so you won't benefit from the D/A conversion in your CD player.
You're just gonna increase the amount of conversions, and thats rarely a good thing.

If you put a preamp in front it could be even worse because you could be feeding the DSP a weak signal, again increasing noise and reducing dynamics.

If you want best possible soundquality, keep the signal digital as longs as possible.
If you want a better D/A converter than the one in miniDSP than the Behringer is'nt an alternative. Then you need to look for solutiouns with digital outpoots so that you can use an external D/A converter, but then again, you would need one for each channel = rare and exspensive.
You could use a computer with software and special soundcards, but it's advanced and requires some computer skill, and playing around with plug ins.

If the miniDSP is to cheap for you, and you want an easy, does it all, premium product I think you need an DEQX.

Last edited by FredrikC; 11th December 2010 at 01:08 PM.
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Old 11th December 2010, 01:10 PM   #8
doug20 is offline doug20  United States
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Quote:
Originally Posted by FredrikC View Post
If you use the search function for miniDSP you will find that many are very happy with the performance, and there have been direct comparisons with the Behringer unit and also DEQX.
The miniDSP should be a better choice for most people cause it's designed for normal equipment, where the Behringer is designed for much hotter signals, both in and out, and will therefor have a bad S/N with allot of hi-fi type of amps and sources. Also because the miniDSP boards has a limited functionality they are very fast, and reprecent very little delay compared to many other DSP solutions.

For optimum sound quality use digital in, and have an anologue volumecontrol after the DSP. A bit complicated since there aren't many multichannel pre amps (you could build yourself). The miniDSP can controll volume digitally, but with a high gain amplifier and sensitive loudspeakers this could mean that you reduce the bit depth too much, getting bad S/N.
Im one of those that has DCXs in their system for years. I now have 2 MiniDSPs and another one on the way.

I can not say enough good things about them. They do not have the "on the fly" tweaking ability of the DCX and I will keep the DCX around for prototyping.

Now if we could someone how add phase correction the the MiniDSP it would be even more incredible.

FWIW, I have zero noise issues with my waveguide/CDs or my ribbon designs. I actually hear less noise then what I did always with the DCX etc.

Im also one that thinks the A/D then D/A worries are overplayed. I have done DBTs with passive XOs vs Active XOs on the same speakers and there isnt any proof that one sounds better over the other. That is still a choice for others to make though. Im extremely happy with my solution.

Last edited by doug20; 11th December 2010 at 01:14 PM.
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Old 11th December 2010, 01:16 PM   #9
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Quote:
Originally Posted by doug20 View Post
Im one of those that has DCXs in their system for years. I now have 2 MiniDSPs and another one on the way.

I can not say enough good things about them. They do not have the "on the fly" tweaking ability of the DCX and I will keep the DCX around for prototyping.

Now if we could someone how add phase correction the the MiniDSP it would be even more incredible.

FWIW, I have zero noise issues with my waveguide/CDs or my ribbon designs. I actually hear less noise then what I did always with the DCX etc.
Great feedback! I have ordered them myself aswell, can't wait to start playing with them =) I'll be using them on a 2-way with wave guide.

The greatest thing about the miniDSP is really they way they keep upgrading it through new plug ins and new I/O cards, so the functionality is almost limitless. It will not be outdated.
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Old 12th December 2010, 02:22 AM   #10
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Does anyone have any input on which would sound (quality) better between the MiniDSP and the DBX 260? Anyone know what the chip set is used in the DBX 260? Im not so clear on the specs of either and which will apply used with an analog input. 24/96 24/48...ect. The miniDSP states a 48bit dsp....what is the DBX at?

I like the minimalist approach with the MiniDSP but if the DBX has more to it and sounds as good, I dont mind the price. 1k is OK for now.
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