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DDRC-88D use case 1 month 1 week ago #56891

  • daveing
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Hi!

I'm still looking at options for my 2-way crossover + sub management solution. The DDrc-88A & 88D will get me there but I have a few questions regarding the 88D.
  1. Are users typically deploying 3 stereo DACs for converting 6 channels out of these? I've seen multi-channel DACs but they typically have a 7.x input though one connection rather than say 3 stereo digital inputs for six analogues out.
  2. How does one control the volume synchronously on a set of three stereo DACs? Or does the 88D do the volume control for all channels? (Meaning we plug the DAC analogue outputs directly into the power amplifier?)
Thanks for your assistance.
 

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DDRC-88D use case 1 month 1 week ago #56905

  • mdsimon2
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What is your specific use case? Do you need Dirac? For typical 2 channel active crossover + sub applications I would probably go with a 4X10HD unless you were running a multichannel system (i.e. 5.1 or 7.1) and/or wanted Dirac.

For the DDRC-88D it will provide synchronized outputs and therefore you can use multiple stereo DACs without issue. If you do this it probably makes sense to use identical DACs as they will have the same delay and phase response. As you mention there are few DACs that have multiple AES inputs but in general those are pro audio DACs and are relatively rare.

For volume control I would use the DDRC as it solves the problem of keeping the DAC volume controls in sync. The only issue with the DDRC is that it does not have a display for volume indication but if you are DIY inclined you can add a simple display using minidsp-rs.pages.dev and a raspberry pi. You could also use a multichannel volume control downstream of the DACs but those are quite expensive and channel imbalance can be an issue.

Michel


 
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DDRC-88D use case 1 month 6 days ago #56952

  • daveing
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Thanks for your thoughts Michel.

It's for 2 channel active crossover + subs application + Dirac. I figure Dirac will get me a great result for a few hours 'work' vs needing a couple of weekends with REW in a house full of family.

Matching DACs - ok.
Adding a volume display sounds like fun.

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