Introduction 
It has a compact and classy design same as the sMS-1000, the OLED display window on the front of sDP-1000 shows the various information related to its use and switches can easily be controlled by a remote control.
To increase the effectiveness of the clock signals, it consists of specially designed high performance oscillation circuits that include ultra-low jitter clock and active noise canceller.
Also, to supply the high quality power, it has two battery packs and automated charging circuit for blocking the noises from the AC power, and an Ultra Low Noise Regulator applied to each circuit element performs with much lesser  sound.
USB input circuits use an asynchronous mode to eliminate noises from the PC clock, and it can play a maximum of 32bit/192KHz PCM and DSD.
The function of the built-in preamp is enough to make it perform as a  high end audio system


Features
-DAC and Preamplifier
-Shown the audio-input information through OLED windows
-Supply the very classy-designed remote controller
-Power to the product via Dual batteries
-Playback the DSD source


Specification

- Digital Audio Input
    USB input
       USB 2.0 high speed
       USB audio class 2.0
       44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz sampling rate
       Max 32bit PCM & 1 bit DSD
       Sampling rate auto detect and display
       Asynchronous isochronous mode operation
       Windows OS, Mac OS-X , Linux Support
       Ultra Low Jitter clock with active noise canceller
    AES/EBU, BNC, Coaxial, Optical input
       AES, S/PDIF data format compatible
       32KHz, 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz sampling rate
       Max 24bit PCM audio data
       Auto enable de-Emphasis filter for 32KHz, 44.1KHz, 48KHz sampling rate

 - Analog Audio Input
   Stereo balance input x 1 and unbalance input x2
   Input cross talk reduction circuit

 - DAC output
   Full balance buffer circuit
   Passive L-C low pass filter
   Wide range frequency response : 10Hz~100KHz(-3dB)
   SNR : -110dB >
   THD+N : -100dB >

 - Preamp
   0dB ~ -90dB, 1 dB step
   Stereo balance output x 1 and unbalance output x1

 - Power circuit
   Battery operation
   Double Li-Ion battery pack and automatic charger.
   Ultra low noise regulator circuit for all digitral and analog circuit

 - Dimension
   Width : 360 mm, Height : 68 mm, Depth : 240 mm

Other
sDP-1000 has officially announced at 2013 CES show successfully, 
http://www.audiostream.com/content/sotm-sdp-1000-dac-preamplifier