I replaced the volume pot on my tube preamplifier.

@viridian  No. Log to log.

Thank you, much appreciated.

I agree with @mulveling.  The Blue Velvet is a real bottleneck.  It floors me to see otherwise respectable preamps with a Blue Velvet.  It is a genuine loser.  I first tried the Blue Velvet about 25 years ago and didn’t like it.  I then bought an Alps Black Beauty and I loved it.  That led me to order a number of pots to see if I could find something even better than the Black Beauty.  These included Noble, TKD, a stepped Alps, vintage Allen Bradley, a couple stepped attenuators, and an expensive Penny and Giles.  None of them sounded as good as the Black Beauty so I bought a few spares.  Two decades later they still sound just as good and they are just as quiet as they were when I first installed them.  Definitely a good investment.  
 

The Alps RK50 is supposed to be even better than the Black Beauty.  I have never heard one so I don’t know that for a fact.  In any event, they are not only hard to find they are also quite large, too big to fit in my main linestage.   However, if I do come across an RK50 I will try it just to find out.

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 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!