Rear Panel; Analog Input - Rca Unbalanced; Computer Input - Usb - Benchmark DAC1 PRE Instruction Manual

Rear Panel

Inputs
There are six stereo inputs on the DAC1
PRE: 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 PRE 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.
DAC1 PRE Instruction Manual Rev J
Analog Input – RCA Unbalanced
The DAC1 PRE 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 PRE. The
USB cable connects the DAC1 PRE 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 PRE can begin
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