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Old 6th September 2002, 09:32 PM   #11
Peter Daniel is offline Peter Daniel  Canada
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That's not too bad. For everybody considering that approach I suggest using fixed series resistor and change only the resistors to the ground with a switch, like Harry did in his passive pramp.
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Old 6th September 2002, 09:34 PM   #12
Gabrielshorn is offline Gabrielshorn
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Is that what you call a shunt attenuator? Changing the resistance to ground, I mean.
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Old 6th September 2002, 09:45 PM   #13
Peter Daniel is offline Peter Daniel  Canada
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Yes.
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Old 6th September 2002, 09:52 PM   #14
Nelson Pass is offline Nelson Pass  United States
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balanced volume control
We used a pot across the balanced output in the
DAC, as described by Peter. It works fine except that
it won't give you absolute zero volume. There is always
some residual output at minimum.

By the way, we bought a pile of those Electroswitch 23
position switches and regretted it. I have boxes of them
if anybody wants to make me an offer.


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Old 6th September 2002, 10:04 PM   #15
jwb is offline jwb  United States
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If you use that electroswitch non-shorting model, wont the volume go to maximum between positions? And wouldn't that be Bad(TM)?
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Old 6th September 2002, 10:14 PM   #16
Peter Daniel is offline Peter Daniel  Canada
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Quote:
Originally posted by Nelson Pass

By the way, we bought a pile of those Electroswitch 23
position switches and regretted it. I have boxes of them
if anybody wants to make me an offer.


There must be something about those switches, because Sonic Frontiers were getting rid of them too. I have only 3 left.

jwb, in that location it has to be a shorting one.
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Old 6th September 2002, 10:32 PM   #17
jag is offline jag  United States
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Quote:
Peter:

Instead of placing the pot between output and ground (4 needed) place the pot between positve and negative output of ea balanced channel (2 needed), so one stereo pot would work. This way, depending on impedance of the pot, positive and negative output will cancel each other without conecting to ground. You can find this setup in Pass D1 DAC.
Is this what you mean?
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Old 6th September 2002, 10:55 PM   #18
Peter Daniel is offline Peter Daniel  Canada
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Default More like this.

Taken from Denon high end ad. You can place pot either at the input or the output.
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Old 6th September 2002, 11:20 PM   #19
skaara is offline skaara  Slovenia
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Ill try peters suggestion tomorrow..
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Old 6th September 2002, 11:32 PM   #20
Peter Daniel is offline Peter Daniel  Canada
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Would be glad to hear your observations, I plan to use it in my upcoming preamp as well.
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