DAC1 USB
Instruction Manual Revision D Page 6
Overview
The DAC1 USB is a reference-quality, 2-
channel 192-kHz 24-bit digital-to-analog
audio converter featuring Benchmark’s
Advanced USB Audio technology,
UltraLock™ clock system, and HPA2™
headphone amplifier.
DAC1 Heritage
The pristine audio path of the award-winning
DAC1 has made it the Benchmark of stand-
alone D/A converters. The DAC1 USB
preserves the exact topology of this audio
path while adding some of the most
frequently requested features.
The DAC1 USB includes a very unique USB
input with bit-transparent native 96/24
capability, a programmable mute function,
programmable headphone gain range, an
automatic standby/resume feature, and a
high-current output stage designed to drive
long cables or low-impedance loads, such as
high-end power-amplifiers.
The DAC1 USB looks, sounds, and measures
the same as the DAC1. We have added
convenience and flexibility without altering
the performance.
Applications
The DAC1 USB is designed for maximum
transparency and is well suited for critical
playback in studio control rooms, mastering
rooms, and high-end audiophile applications.
Benchmark’s Advanced USB Audio interface
makes the DAC1 USB an ideal primary
output device for digital audio workstations,
desktop audio editing applications, computer-
based media playback, home media servers,
and computer-based radio broadcast systems.
The rugged and compact rack-mount option
makes the DAC1 USB an excellent choice for
location recording, broadcast facilities, and
mobile trucks.
Digital Inputs
There are four digital input connectors
(coaxial, balanced XLR, optical, and USB).
The coaxial, XLR, and optical digital inputs all
accept professional (AES) and consumer
(SPDIF) data formats at sample rates up to
192 kHz.
Advanced USB Audio Technology
The USB input is compatible with Windows
Vista/XP/2000 and Mac OS X, and does not
require driver installation or system
configuration.
Unlike all previous driverless USB audio
interfaces, Benchmark’s Advanced USB
Audio technology supports sample rates up
to 96 kHz and word lengths up to 24-bits.
The DAC1 USB is a true plug-and-play
solution, and is designed to begin playback
immediately after the unit is connected to a
USB port for the first time.
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