Soekris Engineering ApS
dac1321 Users Manual
www.soekris.dk
3
Dec 2017
Introduction
The Soekris dac1321 is a low cost Audiophile discrete R-2R DAC only, with USB and SPDIF
inputs and line level outputs on rear mounted RCA Phono connectors. The dac1321 is not just any
regular DAC, the sound quality is the absolute best available, thanks to the ultra high end design
with a discrete R-2R sign magnitude DAC using a about 200 small and very precise resistors,
output amplifiers with zero negative feedback, powered by either USB power or an external power
supply, with two discrete linear low noise and low impedance power regulators and one low noise
regulators for the digital parts.
The dac1321 R-2R DAC circuit is fully isolated from the noisy computer USB interface and the
SPDIF inputs are also all transformer isolated. It supports input signals on the USB interface up to
24 bit / 384 Khz PCM audio, and up to DoP-128 (x2) and DSD-256 (x4) audio, or up to 24 bit / 192
Khz PCM audio on the various SPDIF interfaces. It has a fully digital volume control and four sets
of digital anti-aliasing filters to fit any taste. The dac1321 is designed and built in Denmark, using
advanced surface mount technology and parts from only the highest quality suppliers, with a full
aluminum casing.
Quick Start
Plug in the supplied USB Cable to the dac1321 and connect it to your computer, connect your
amplifier to the RCA Line Out sockets, set the rear right switch to “USB1”, select “soekris
dac1xxx” as output in your computer settings and start playing music. The default power up
settings for volume and anti-aliasing filters are stored in flash memory and can be changed, see
front view description for details.