I believe designer Kevin already offers the most wortwhile mods... you can play with personal preference tweaks.. for example Kevin prefers Cardas caps over Vcaps.. and of course the small stuff - tube dampers (I use herbie's), footers.. etc. Mine was built with an outboard power supply, which freed up space for Kevin to install an S&B TVC.
If you haven't installed the Lundahl LL1931 SUTs, the Cardas caps or the Audio-Note tantalum resistor upgrades in your unit, I suppose that would be an excellent starting point. As Dan advises, search through the K&K asylum archives - I think Kevin looks at all his stuff as ongoing "open-source" products, and if there's something in particular you are after, I would imagine him to be quite approachable with any ideas you might have.
This isn't really a "mod" but I am (finally) burning in Kevin's newest creation. I have one of the beta versions of his Sonas Veritas phono stage and it is a dreadnaut, over 37 pounds! Three stage fully differential series feed, transformer coupled design. LL1931 inputs, LL1660 interstage and LL1689 outputs. It uses a LL1650 PS trannie that could power a Dyna ST-70! All current source tails on the cathodes and current source feeds on the B+ of each stage. Will start to listen to it in a couple of days (I'm also in the process of burning in new cabling on my tone arm). Will report on improvement to SE parafeed phono stage if anyone is interested.
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