Instruction manual

DAC1 HDR Instruction Manual Rev I Page 14
Rear Panel
Inputs
There are six stereo inputs on the DAC1
HDR: 1 x Analog, 1 x USB, 1 x Optical, and 3
x Coaxial. These inputs are selected using the
front-panel Source Selector control.
The optical and coaxial can decode AES/EBU
and S/PDIF input signals in either professional
or consumer formats.
TIP: The DAC1 HDR will not decode AC3
or ADAT signals. The ‘Status Display’ will
flash when AC3, ADAT, or other non-PCM
input signals are connected to the
selected digital input.
The Benchmark UltraLock™ system removes
interface jitter from all digital inputs
(including the USB input). The result is that
all digital inputs have identical jitter
performance.
Analog Input – RCA Unbalanced
The DAC1 HDR has an unbalanced stereo
analog input via a pair of RCA connectors.
The analog inputs can be used for devices
such as:
• Phono preamplifiers
• FM Tuners
• Tape Transports
• Analog VCR outputs
• iPod and MP3 devices
• Outputs from analog mixing consoles
Computer Input – USB
The USB input accepts a ‘B-type’ male USB
1.1 or USB 2.0 connector. An ‘A-B type’ USB
cable is provided with the DAC1 HDR. The
USB cable connects the DAC1 HDR directly
to a computer’s USB output. The USB
interface utilizes USB 1.1 protocol, and is
compatible with both USB 1.1 and USB 2.0
ports.
The USB input supports 44.1, 48, 88.2 and 96
kHz sample rates at word lengths up to 24-
bits. The USB interface acts as a ‘native’ USB
audio device and does not require the
installation of any custom drivers.
Benchmark’s AdvancedUSB Audio™
technology achieves bit-transparent operation
without special drivers and without changing
system settings.
The Benchmark USB interface is truly a plug-
and-play solution. The DAC1 HDR can begin
streaming high resolution audio bit-
transparently within seconds after being
plugged into a computer for the first time. No
software or hardware configuration is
required.