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TOPIC: Splitting the output cable

Splitting the output cable 8 months 2 weeks ago #24443

  • jphilpit
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I'm pulling together my audio gear for a 7.1 home theater setup. I plan on placing the 8-channel MiniDSP Dirac Live unit between my pre-amp and my two 5-channel amps. My old L & R front speakers have been bi-amped. I'm hoping to continue that practice. (Please don't discuss the long-time debate about whether bi-amping is worth it; I've heard all the arguments.) My question is about whether there's any problem with using a Y splitter in the balanced cable to go from one front channel in the DDRC-88A into two channels in the amplifier (which will then drive the audio signals to the same speaker box).

Note that I'm placing the Y cable after the DDRC-88A so that the calibration perceives each speaker box as a single unit, even though in 2 cases (L & R front) the box is being driven by 2 separate amps. Also, note that this wiring will be in place for both the calibration and the listening phases.

Any there any thoughts about a better way to calibrate 7 speakers plus 1 sub-woofer where at least 2 of them are bi-wired?

Thanks,
John
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Splitting the output cable 8 months 1 week ago #24470

  • devteam
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@ John

Electrically, it should be fine. No problem.
Note however that you should run 2 x calibration process (running on 2 preset of the box) because you do want to make sure the potential gain structure difference between the 2 boxes, will be accounted by Dirac Live. Does this make any sense?

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Splitting the output cable 8 months 1 week ago #24481

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I'm not exactly sure what you're recommending when you say "to make sure the potential gain structure difference between the 2 boxes will be accounted by Dirac Live." Which 2 boxes? There will be only 1 MiniDSP box, because there are only 8 channels (including the sub-woofer). Do you mean the "potential gain structure difference between" the MiniDSP box and the amplifier box?

I am placing the Y splitters after the DDRC-88A so that 1 channel in the Dirac Live calibration always corresponds to 1 speaker box. In my mind, it shouldn't matter what happens to the audio signal while traveling from the MiniDSP box to the speaker as long as that 1-to-1 correspondence is strictly maintained. Is my thinking wrong on this point?
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Splitting the output cable 8 months 1 week ago #24483

  • john.reekie
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A diagram is worth a thousand words... devteam may have interpreted your question about the Y connector to mean that you want to do some sort of multizone arrangement... but I gather you are planning to use a "passive biamp" configuration like this?



(From www.audioholics.com/frequent-questions/t...biamping-vs-biwiring)

I'm not seeing any reason that won't work as expected. I am curious as to what you think might go wrong?
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
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Splitting the output cable 8 months 1 week ago #24510

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Thanks for the response. Yes, I am planning to do passive bi-amping, as in your diagram.

I was pretty sure that what I'm hoping to do would work, but just wanted to have others evaluate my plan in case there's some gotcha I haven't thought about.

John
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Splitting the output cable 8 months 1 week ago #24521

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Well, I can't think of any reason it wouldn't work fine. You already have the amp channels and I assume cabling anyway so why not :)
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
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