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MrKTrout 28th December 2011 05:17 PM

Need to Upgrade Tube Preamp Volume Pot
What would be a good volume pot upgrade for the Matisse design MDS-623 tube preamp? I would like to upgrade because there is some noise and balance issues with the present volume control.

Matisse design Tube-preamp & fumusic MDS-623 &6N3 & AMP | eBay


Eli Duttman 28th December 2011 05:56 PM

Stepped attenuators, either DIY or off the shelf, are popular. However, stepped attenuators are expensive and the metal film resistors used in their construction can be "cold" sounding.

PEC of Canada makes hot molded carbon controls that are milspec tough, very good sounding, and not especially costly, You can buy PEC controls from DigiKey. A member of the KKA series is appropriate in the stereo volume control role.

Jebem 28th December 2011 07:26 PM

Yap, stepped attenuators are the best choice if money is no object.
But for the price and design of this preamp, I would use one ALPS Blue Velvet potentiometer, as it is adequate and is much cheaper than (good) stepped attenuators.

AdamThorne 28th December 2011 07:37 PM

Ebay has smd based stepped attenuators ~ $10. Chinese manufacture, I think. Log, stereo, 10K / 50k / 100k ohm. Are they any good? I have no idea.

dgta 28th December 2011 10:29 PM

From the eBay ad for that preamp:

"the kind of taste the feeling of gallbladder bile reflected most vividly, especially the night also highlighted its charming style."

I gotta get me some :)

ihear21khz 29th December 2011 01:52 AM

Cheap and good: Analog Metric Limited - DIY Audio Kit
Check out their Dale resistor based stepped attenuator. These sound really good and pay the few bucks more they're asking to have the unit built for you. You'd have to be a brilliant solderer to build it better than they do. I have purchased from them and have had no issues.

john dozier 29th December 2011 03:01 AM

Oh go for it! TKD all the way! Regards

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