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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: How does it comare to a resistor-based volume control with a very low impedence? posted by KCHANG on May 24, 2002 at 13:52:42:
I would be interested to try it. But it seems a tough load, and really not compatible with tubes. A bit like winning a battle and loosing the war?The interesting thing with a transformer is that it generally (attenuation) offers 'low R' sound with low current draw on the source. This reduces distortion in the sources output stage.
With res. att. you get 'low R' sound only with *high*current draw and signal dissipation.
Distortion and higher order harmonics relatively increase with current draw, this seems somehow to be sonically more than offset by the reduced series R, i know it from 1 k series impedance - maybe it goes even lower?
2 V with 300 Ohm makes 6.7 mA or ca. 0.1 W, Class A pull-up need to supply at least 10 mA, another 0.15 W, so the driver needs to stand at least 0.5 W, tough for opamps but not infeasible. Surely not middle off the road source territory...I heard something like a slight 'powdery' grain - distortion? - with the 1k EVS Ultimate
How do you drive your VC?
The Silver Rock has ca. 200 Ohm series impedance.
What TVC did you listen to?
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Follow Ups
- Re: How does it comare to a resistor-based volume control with a very low impedence? - Arbelos 16:40:16 05/24/02 (1)
- Re: How does it comare to a resistor-based volume control with a very low impedence? - KCHANG 05:59:15 05/28/02 (0)
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