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Old 13th August 2012, 09:04 AM   #11
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Do to concerns about configuration I haven't taken the plunge. Good thing too,as the new nanodsp seems to be a much better fit. I am building a desktop to serve the entertainment area. I didn't have s/pdif, but the new z77 board will have. A 2x8 will make it much easier and cheaper to go 3.1 also. I am wondering if optical cable from nano to mini amps in each speaker will work, as I will use a central external nano, and mini-amps to bi/amp each speaker.
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Old 14th August 2012, 04:07 AM   #12
minidsp is offline minidsp  Hong Kong
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@ Lduarte,

Glad to hear that you're happy with your miniDSP 4x10Hd! :-) Moving to an active setup is indeed requires a bit of time to get all the crossover frequencies + tuning right. Doing a couple of measurements with REW combined with a simulation crossover tool (e.g. ACD tools from Charlie) would be the way to go.

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Old 17th August 2012, 09:51 AM   #13
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im still struggling with bass , matching my subs and woofers , but its getting better everyday. Another plus for minidsp is that i feel stereo crosstalk is much better than with the speakers crossover
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Old 19th November 2012, 01:34 AM   #14
MedPed is offline MedPed  United States
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Dear miniDSP,

I am currently running studio monitors from a very high quality DAC/Preamp (SNR>130).

I am building twin subs, and can't decide b/w the 2x8 or 2x4balance for bass management/crossover. For the most part, the 2x4 is perfect, but it seems, at least by the spec sheet, that the 2x8 has higher quality output (better SNR and lower distortion).
How relevant is this? I really do not need the 2x8, but don't want to degrade the DAC output too much either. Do I have a reason to be fearful of the 2x4?

Secondly, can the 2x8 also be powered by USB like the 2x4, and does the kit version come with a power supply, or just the barebones PCB sans the digital i/o and the potentiometer.

Thanks in advance.
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Old 7th December 2012, 04:26 AM   #15
minidsp is offline minidsp  Hong Kong
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@ Medped,

Sorry for missing to answer to your email. In answer to your question, if you want to use your existing high end DAC, I guess that you could always use the nanoDIGI 2x8 (all digital DSP with SPDIF in/out). Then you can use your own DAC.

The miniDSP 2x8 has indeed better DACs than the miniDSP 2x4. Please read the user manual, questions like powering are all described in great detail. :-)

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Old 13th December 2012, 03:01 PM   #16
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I've been playing with the 2x4 DSP in a box for a while. Is there anything I can do to minimize the white noise?

The unit is a real joy to play with and it is used in our LAB to find the optimum filtersettings. Its impressive how fast and easy you can change the settings on the fly.

When the noise is reduced we can use it in our production for active speakers where we now mimic the settings found in an opamp based active filter. We would perfer to use the minidsp bare board as it would allow optimizing production units when fully finnished.
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Old 13th December 2012, 03:36 PM   #17
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Quote:
Originally Posted by Tarasque View Post
I've been playing with the 2x4 DSP in a box for a while. Is there anything I can do to minimize the white noise?

The unit is a real joy to play with and it is used in our LAB to find the optimum filtersettings. Its impressive how fast and easy you can change the settings on the fly.

When the noise is reduced we can use it in our production for active speakers where we now mimic the settings found in an opamp based active filter. We would perfer to use the minidsp bare board as it would allow optimizing production units when fully finnished.
The noise spec of the 2x4 is very good, so it might be your power supply. Look for a low noise regulated linear PS. You can test out the potential improvement using batteries...

-Charlie
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Old 8th February 2013, 11:38 PM   #18
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HOW IS THE "DIGITAL VOLUME CONTROL IMPLEMENTED IN THIS SYSTEM PARTICULARITY THE new 4x10 full packed unit..

just curious as i have not seen any measurement on the analog outputs
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Old 14th March 2013, 04:10 AM   #19
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Have the noise results reported at the following link (see Reply #113) for the 2x8 board been encountered by anyone else?

New miniDSP 2x8 / 4x10 card
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Old 15th March 2013, 02:26 AM   #20
Davey is offline Davey  United States
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I believe that noise is nominal for the 2x8/4x10 card. It's the result of the noise shaping used within the system architecture and not abnormal for this device.

It seems when I made those measurements I have just confused folks with the results. That was not my intention.

Depending upon power amp gain and speaker sensitivity this noise is (probably) not even audible.

Cheers,

Dave.
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