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In Reply to: RE: Output impedance of a DAC to input impedance of Power amp?????? posted by Astrostar60 on August 11, 2014 at 02:40:40
The Khozmo will be constant input impedance.Edit - it's a fixed series resistor and variable shunt, so it's neither.
Edits: 08/11/14Follow Ups:
With a shunt attenuator wouldn't the input impedance be Rx + (Ry//input impedance of destination) and change with every click?It would never be lower than Rx. Is that what's meant by "constant input impedance"?
To me the biggest concern is the output impedance.
With a 10k Rx, at -6db the output impedance of the attenuator is 2.5k (assuming an infinite destination impedance and zero source impedance).
Am I missing something?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 08/11/14
Yeah, I looked at all the Dale resistors on that attenuator and thought it was a conventional stepped attenuator, but now I see the fancy single series resistors.
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