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Quick Balanced => Unbalanced Conversion

Forum Audio : Pro Audio - Quick Balanced => Unbalanced Conversion

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Archived from groups: rec.audio.pro (More info?)

 

Having a piece of balanced gear(D/A converter) that I want to connect to
my preamp/amp but not wanting to pay for a balanced/unbalanced converter
box lead me to hook up a pair of headphones to the + balanced out and
ignoring the - balanced out. This seemed to work just fine, any real
reason to not go this route when I wire up the cable for real? I'm only
using short cable runs so noise shouldn't be a problem. Only thing that
comes to mind is that the signal strength might be reduced by half, but
my preamp/amp should be able to take care of that, no?

Thanks
Mike

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On Sat, 07 Aug 2004 22:47:43 -0400, Michael Dombrowski
<legodudenein@hammycorp.com> wrote:

>Having a piece of balanced gear(D/A converter) that I want to connect to
>my preamp/amp but not wanting to pay for a balanced/unbalanced converter
> box lead me to hook up a pair of headphones to the + balanced out and
>ignoring the - balanced out. This seemed to work just fine, any real
>reason to not go this route when I wire up the cable for real? I'm only
>using short cable runs so noise shouldn't be a problem. Only thing that
>comes to mind is that the signal strength might be reduced by half, but
>my preamp/amp should be able to take care of that, no?

The standard way of unbalancing a connection is to use the +, tie the
- to screen. Don't worry about the level.

CubaseFAQ www.laurencepayne.co.uk/CubaseFAQ.htm
"Possibly the world's least impressive web site": George Perfect

Reply to Anonymous

Archived from groups: rec.audio.pro (More info?)

 

"Michael Dombrowski" <legodudenein@hammycorp.com> wrote in message
news:2nliigF238qpU1@uni-berlin.de
> Having a piece of balanced gear(D/A converter) that I want to connect
> to my preamp/amp but not wanting to pay for a balanced/unbalanced
> converter box lead me to hook up a pair of headphones to the +
> balanced out and ignoring the - balanced out.

That's how most such conversions are done these days - ignore the inverted
output and go with the non-inverted output. On equipment that is just
impedance balanced, the inverted output is connected to ground through a
resistor - not much signal there!

> This seemed to work
> just fine, any real reason to not go this route when I wire up the
> cable for real? I'm only using short cable runs so noise shouldn't be
> a problem. Only thing that comes to mind is that the signal strength
> might be reduced by half, but my preamp/amp should be able to take
> care of that, no?

The signal strength will be cut in half, but there should be more than
enough from most +4 outputs to make your headphones loud, provided they
don't have too low of an impedance, and load the line-level output down. I
favor the use of high impedance headphones, average sensitivity phones like
the Sennheiser HD 580s in this application.

Reply to Anonymous

Archived from groups: rec.audio.pro (More info?)

 

On Sat, 07 Aug 2004 22:47:43 -0400, Michael Dombrowski
<legodudenein@hammycorp.com> wrote:

>Having a piece of balanced gear(D/A converter) that I want to connect to
>my preamp/amp but not wanting to pay for a balanced/unbalanced converter
> box lead me to hook up a pair of headphones to the + balanced out and
>ignoring the - balanced out. This seemed to work just fine, any real
>reason to not go this route when I wire up the cable for real? I'm only
>using short cable runs so noise shouldn't be a problem. Only thing that
>comes to mind is that the signal strength might be reduced by half, but
>my preamp/amp should be able to take care of that, no?

Short answer, it depends. (the Bob Dole answer)

I have this url memorized: http://rane.com/note110.html

>Thanks
>Mike

-----
http://mindspring.com/~benbradley

Reply to Anonymous

Archived from groups: rec.audio.pro (More info?)

 

In article <2nliigF238qpU1@uni-berlin.de> legodudenein@hammycorp.com writes:

> Having a piece of balanced gear(D/A converter) that I want to connect to
> my preamp/amp but not wanting to pay for a balanced/unbalanced converter
> box lead me to hook up a pair of headphones to the + balanced out and
> ignoring the - balanced out. This seemed to work just fine, any real
> reason to not go this route when I wire up the cable for real?

Not if it works.


--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

Reply to Anonymous

Archived from groups: rec.audio.pro (More info?)

 

In article <kb1ch0loftgusqf3al222nuiqm35t01o2f@4ax.com> l@laurenceDELETEpayne.freeserve.co.uk writes:

> The standard way of unbalancing a connection is to use the +, tie the
> - to screen. Don't worry about the level.

This works all the time if the output is from a transformer. In fact,
that's the right (and really only) way to do it. However this isn't
the only way to build a balanced output. There, in fact, many ways to
build an active-balanced output. If it's one where the low side is
created by running the high side through an inverter, on good days all
you'll do by grounding the low side is increase distortion and reduce
the maximum output level of the high side. On bad days, you could
damage the IC that's driving the low side of the output.

No rules, until you know which game you're playing.

--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

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