miniDSP 4x10 Hd - Should I be looking at anything else? - diyAudio
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Old 11th September 2013, 10:39 PM   #1
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Default miniDSP 4x10 Hd - Should I be looking at anything else?

I basically want all the capabilities of the 4x10 Hd. I guess if I were really choosing my own features, I'd want 4-channel analog in, 4-channel digital in, and 8-channel analog out, AND corresponding 8-channel digital out.

The point of the 4-channel analog input would be to handle a turntable separately from normal analog input. The point of the 4-channel digital in would just be to keep a CDP connected at the same time as the music server. The 8-channel digital out would be in case I someday decide to buy some direct-digital amps, but I definitely want the 8+ analog out either way.

Anyway, if anyone has any other suggestions of things I should be looking at, things that don't costs several times more $, I'd love to hear it! I'm 100% open to solutions requiring a dedicated computer.
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Old 11th September 2013, 11:03 PM   #2
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First, I suggest that you study the data sheet a little more carefully - the 4x10 does not have 4 inputs (4 analog OR 4 digital). 8-channel digital out is not supported either, as far as I am aware of. There is only 8ch of analog output and 2 ch of either analog or digital output.

The 4x10 is not a preamp with multiple inputs for different types of gear. How are you going to implement the RIAA phono preamp stage? I do not suggest that you use the MiniDSP for this! The 10x10Hd might work as a preamp, but you essentially only get more analog inputs.

The MiniDSP products have their own weaknesses, especially when used as a preamp. If that is what you are primarily looking for (a preamp with some room correction for instance) you would probably be better served with something else.

The MiniDSPs are great if you are designing your own DSP loudspeaker crossovers and want a little extra functionality like volume control or switching between a few different response curves. The ease with which the crossover filters can be programmed and reprogrammed, as well as some advanced capabilities for implementing certain types of DSP filters, makes these very attractive for DIY loudspeakers, and some other applications and this is IMO the main strength of the product line.
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Old 12th September 2013, 12:36 AM   #3
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I guess I made that confusing. The features of the 4x10 Hd are the minimum that I want (to implement DSP crossover/EQ). The capabilities that I described are things that would make an alternative more appealing. The RIAA would be handled digitally after an RIAA-less phono preamp, given a setup where that were practical.

Last edited by dumptruck; 12th September 2013 at 12:43 AM.
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Old 15th September 2013, 05:28 PM   #4
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Do yourself a favour and prototype with the miniDSP and then build a passive crossover network.I have a miniSHARC and it does not compare to the OEM passive crossover in my system(Very Disappointed).The miniDSP is cheap enough to test with and is very powerful for prototyping when used with a mic, but comes up short in sound quality.
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Old 15th September 2013, 05:55 PM   #5
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( do ourselves a favour and keep the analog path clean ....)
why mix the two ? Or maybe...cannot find the right EQ for some records
made before RIAA standards ?
The real thing about turntables and vynils is that the signal available after stylus reading is made of alternative and periodic changes of tension and current...yes, that's analog ! You would want to break it into millions bricks
to stream ...and then recompose...ooooh
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Old 15th September 2013, 11:29 PM   #6
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An analog purist posting in the digital line level forum? Ho hum.

Quote:
Originally Posted by damuffin View Post
Do yourself a favour and prototype with the miniDSP and then build a passive crossover network.
Funny you should say that. The reason I posted with this is that more DSP capability is something I'd like for prototyping, but I'm also interested in trying some completely digital main systems, and I am considering whether I might use the same tools to do both. For prototyping only, when I'm already using a computer interface and multiple amp channels for measurements, there should be no need for additional hardware. Which is why I have this thread: Free/Cheap Crossover Emulation?. If also using the computer for a primary system, I'd probably want some higher-end device(s) doing ADC and DAC than the cheap Tascam unit I currently use for designing speakers.

Quote:
Originally Posted by damuffin View Post
I have a miniSHARC and it does not compare to the OEM passive crossover in my system(Very Disappointed).
That's perfectly plausible I suppose, but do you actually have data showing the problem was not your implementation?

Last edited by dumptruck; 15th September 2013 at 11:33 PM.
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Old 16th September 2013, 12:27 AM   #7
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Haha, everybody wants a measurement. Does Nelson Pass give measurements for all his recommendations? IMHO I have wasted my money buying a miniSHARC. It takes a 44.1 khz signal and then up samples it to 48khz. You cannot use an external clock. The power supply's have issues and there is probably a lot of crosstalk and jitter happening. But by all means please prove me wrong.
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Old 16th September 2013, 12:55 AM   #8
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I don't want the miniSHARC, you don't want the miniSHARC, so neither of us has much reason to prove anything. I'm just saying that without any reason to think you successfully duplicated the passive filter, I can't put any stock in your evaluation.
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Old 16th September 2013, 01:17 AM   #9
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I am just trying to save peoples time and money. I have invested at least 40hours into DSP and it is the weakest link in my system. So when you make your purchase, be aware that it is degrading the signal, and that a passive crossover is far superior.

I have yet to test low level active networks but am in the process of building a circuit. This could be the best option for Bi-amping.
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Old 16th September 2013, 02:50 AM   #10
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