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In Reply to: RE: Is this the preamp you are talking about posted by BRab on April 20, 2016 at 06:34:10
I've read good things about both. What do you feel the TKD does better? Thanks.
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I had the Slagles in a passive that had a selector switch that became noisy. I replaced the passive with an old TKD volume pot I had previously used and was very surprised with the improvement in detail, frequency extension and dynamic contrast. I still think the Slagles are very good and the improvement may be down to a lucky match of the TKD with my sources and amplifier with respect to impedances etc, but I do think the alleged superiority of stepped attenuators, autoformers and all the rest of the miracle attenuators is really overstated and the sq of a good traditional volume pot can be quite extraordinary.
You are comparing a transformer (autoformer) volume attenuator to a resistor-based volume attenuator. Sort of apples to oranges except that they both attenuate volume. I believe TKD made both resistor-based attenuators as well as potentiometers, which are a different device and generally thought to be inferior sonically to a discrete resistor based control. Do you know whether yours is a potentiometer or resistor based control?
For the resistor volume attenuator, the switch itself, whether TKD, Khozmo or other types is basically a means to make contact with discrete resistors. The biggest sonic difference will be the type of resistors used. The other thing that may have a smaller effect on the sound is the quality of construction and materials used in the contacts (e.g., silver or gold plating over a base metal). Otherwise, what makes one attenuator better than another are the ergonomics (how it feels when used) and durability.
My preamp has a Shallco switch with Audio Note Tantalum Resistors and sonically it beats both Goldpoint and Endler switches I also have here, although the comparison is not fair since the Shallco is part of a no-gain buffered preamp and the others are simply volume attenuators. I owned a Tom Evans Vibe that used a DACT attenuator (which uses SMDs same as the Goldpoint) and that preamp sounded outstanding, although not as good as my current preamp. The easiest thing might be to try a Goldpoint attenuator or find somewhere to buy the TKD attenuator, not the potentiometer.
Below is a link to a site showing many types of volume controls.
nt
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