LDR Active Preamp - does it exist?

The only one I know of that's not $40k is the old Melos SHA Gold. There's one on listed here now if it hasn't been sold. I've had an LDR for years. Wouldn't swap it for anything. I'd change amps first. Also, you may want to check with Uriah Dailey on the DIY Audio forum to see if he can offer a solution.

I've had both a battery and an AC version of the Lighter Note, which is based on George's design, at the same time. I found that the AC version is better but only if you keep it on all the time. I don't know why, but it sounds better after being on for 48+ hours. I've confirmed this a number of times and also in two different homes. The AC version has better dynamics and more sparkle up top than the battery version does.