For sale is my Tortuga-based passive preamp with integrated high quality linear power supply. The LPS also has a separate 5V output on the chassis, so you can run a two-headed USB cable that separates the 5V power from the data lines, and use this high quality LPS to supply clean 5V to your DAC. So, this baby is a bit of a two-fer.
Two inputs, two outputs.
The manufacturer is kind of a crazy fanatic. It's in a really heavy gauge chassis, with quality laser etched printing. But beyond that, it has all high end solid core silver wiring internally, except for one of the outputs, which has solid core platinum wiring. So, you can choose which output sounds best to you. It also has the highest quality Furutech RCA connectors. Here's a link to the manufacturer's website:
http://aumacoustics.com/aum-acoustics-ldr-preamplifier/I've had this for two years, and it's been a very useful and transparent window. Selling because I've installed the Lampizator volume control in my Big7 and no longer have need for an external passive like this.
The Tortuga boards are stock and fully update-able to latest firmware. I have updated to firmware allowing user-controlled impedance matching, but not to the very latest firmware with new remote control functions. Updating the firmware is pretty easy, but does require popping the lid. If the buyer really wants the latest firmware and does not want to do the update themselves, I can perform this before packing/shipping.
Comes with an Apple remote, which is the standard remote type for Tortuga preamps.
New retail: $3,000
My price: SOLD