Two modes: NOS or DSD. Built by resistors.
from the look of things.
~US$1500 or so for the best version, if I am reading correctly.
I just saw this DAC here: http://kitsunehifi.com/product/springdacgreen/ It looks like they have three versions of it. If this thing is as good as it sounds maybe I will just keep saving the money I was working up for my Gungir's Multi-bit upgrade and just step-up to one of these things? I would love to hear / see some reviews of it from fellow Head-Fi members or some other outside sources.
Here is an album of just photos of the unit itself (not performance graphs or anything) courtesy of http://kitsunehifi.com/ and various other sources:
Warning: High Quality Photos Inside! (Click to show)
(Non-rendered Photo Of The Spring DAC - Blue Display LEDs)
(Spring DAC Front)
(Spring DAC Right)
(Spring DAC Left)
(Spring DAC Button Options)
(Spring DAC Feet)
(“Rise Ji Edition” With Red Label Transfomer)
(“Rise Ji Edition” With Green Label Silver Transfomer)
(Base Model Power Capacitors)
(The Beauty Of Discrete R2R)
(R2R - 2)
(R2R - 3)
(R2R - 4)
("A small Talema is ONLY used for standby power. The Spring DAC was designed to be POWER EFFICIENT")
(Take notice of the custom HOLO Audio IC's)
(Jensen Caps 4700uF 63V)
(Red Label O-Core 100VA)
(Red Label Transformers)
(Prototype(?) Spring DAC Input / Output Rear I/O)
("No off the shelf USB modules, this one is HOLO Audio brand.")
(Prototype(?) Spring DAC Rear USB / Input Area)
As far as I can tell the Spring DAC has:
Edit: Awe... Ninja'd by @kazcou