Potentiometer value for Zen v4

frags · 13th October 2009, 03:16 PM

I could not find any general rule of choosing potentiometer value for amplifiers.
Which value will be better for Zen V4 10k, 50k, 100k or it does not matter?

Nelson Pass · 13th October 2009, 05:21 PM

It does matter a bit. The input impedance of Z4 is 47K,
so you want the potentiometers maximum output impedance
to be smaller than that.

The maximum source impedance of a potentiometer used
as a voltage divider (the output = wiper) is 1/4 the value
of the pot.

A 50K pot would give 12K, which would be the maximum
I would recommend.

frags · 13th October 2009, 06:27 PM

Thank you for the explanation.

13th October 2009, 03:16 PM	#1
frags diyAudio Member Join Date: Aug 2009	Potentiometer value for Zen v4 I could not find any general rule of choosing potentiometer value for amplifiers. Which value will be better for Zen V4 10k, 50k, 100k or it does not matter?

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13th October 2009, 05:21 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	It does matter a bit. The input impedance of Z4 is 47K, so you want the potentiometers maximum output impedance to be smaller than that. The maximum source impedance of a potentiometer used as a voltage divider (the output = wiper) is 1/4 the value of the pot. A 50K pot would give 12K, which would be the maximum I would recommend.

13th October 2009, 06:27 PM	#3
frags diyAudio Member Join Date: Aug 2009	Thank you for the explanation.