Alps and Bourne pots are junk ,2 plastic wipers with a conductive spray on them $25
where any good volume pot has a resistive ladder and then relay controlled
which the Khozmo has I have used them before .
I replaced the volume pot on my tube preamplifier.
Replaced the two mono Alps pots in phono preamp with Tocos (Tokyo Cosmos), RV24 units. I heard good things about these pots on other forums. Fair bit of work getting them to fit into the Croft 25R. I had to loosen the tube boards and drill out the mounting holes for the larger threads. The pots were only $26 for both inc tax and shipping. Huge improvement in speed, clarity, solidity, and transparency. I'm blown away.
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I replaced the damaged OE pot in my Krell pre with a TKD 2CP-2511. I originally wanted a resistor ladder attenuator, but couldn't find one that physically fit in the limited space. So I settled on the TKD 2CP-2511 and, as @mulveling shared, it is fantastic, in terms of both sound quality and feel. I ordered mine from Michael Percy and I am comfortable recommending both (the TKD and Michael Percy that is). My understanding is that Goldpoint is working on a new subcompact resistor ladder attenuator suitable for space-constrained retrofits. Happy listening!
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The only MZ2 pics I see online clearly show an RK27 - some motorized, some not. An RK50 wouldn't even fit in there without a motor - it's massive. IIRC motors for RK50 have to be custom made; VAC is the only one I know of doing it in their preamps, which start at $30K. Never heard of an "RK50A". If you're seeing a huge shiny brass cylinder, then it's definitely an RK50. Getting a great sounding analog volume control with good granularity (at least 40+ steps) and reasonable price is hard enough. Adding motorization / remote control just adds to the challenge. No wonder some (like Audio Research) have gone to digital chips. Khozmo Poland is worth a mention; they produce some very good looking analog volumes w/ controllers, high quality resistors, and fine-grained steps (60+). Lots of flavors to choose from: Shunt, Ladder, Stepped. "Ladder" sems to be the most premium of discrete options. Verified good sound:
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