Hypex ucD180 balanced to unbalanced - diyAudio
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Old 13th November 2013, 09:58 PM   #1
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Smile Hypex ucD180 balanced to unbalanced

caveat: total newbe

Hi all, I have ordered a kit to build a hypex amplifier (2 ucd180HG modules, 1 PSU). I would like to build it as recommended, i.e. as a balanced version. Source is a Pioneer N-50 and in between is a passive pre-amp to control the volume.

My question is: can I use a simple XLR to RCA adapter to interface the amp and the attenuator ? like this one?

Thank's all. Will be posting build pics once I've started and probably have some more questions.

Last edited by r100; 13th November 2013 at 10:36 PM.
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Old 13th November 2013, 10:28 PM   #2
fpitas is offline fpitas  United States
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Your link 404s. In any event, here's Hypex's wiring suggestion:

http://www.hypex.nl/docs/appnotes/wiring.pdf

Note the connection (both the shield and twisted pair) is continued balanced all the way to the RCA end. This uses the - (inverting) input of the UcD as a remote ground sense, which minimizes ground related issues.
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Last edited by fpitas; 13th November 2013 at 10:31 PM.
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Old 13th November 2013, 10:40 PM   #3
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sorry about the 404.. fixed it .. the wiring of the adapter is as follows... is that ok ? thanks

3 pole XLR female – RCA / phono socket

Wired according to IEC 268-12:
Pin 2: signal
Pin 1 and 3: connected to ground
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Old 13th November 2013, 11:51 PM   #4
fpitas is offline fpitas  United States
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That could be a good solution, as long as the adapter is located at the source, and you run an XLR cable to the UcD. I'd think you'd want a male RCA on the adapter in that case, like this one:

Click the image to open in full size.
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Old 14th November 2013, 01:30 PM   #5
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Quote:
Originally Posted by fpitas View Post
That could be a good solution, as long as the adapter is located at the source, and you run an XLR cable to the UcD. I'd think you'd want a male RCA on the adapter in that case, like this one...
Ok, got it. Only problem with that in my configuration is that it would make the passive pre-amp tilt over :roll eyes:

So, I was wondering if a simple RCA (source) to XLR (amp) cable would do ? Or should I just wired the amp unbalanced ?

thank's


PS. Just got the package from Hypex.. I wasn't expecting it so fast
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