Instruction manual

DAC2 DX Instruction Manual Rev A Page 15
always provides the cleanest and shortest path from the digital source to the monitor outputs. This
direct connection often produces a substantial improvement in sound quality.
The DAC2’s XLR output is equipped with 0, 10 and 20 dB output attenuators for optimal
interfacing. The pads optimize the output signal level of the DAC2 to the input sensitivity of
virtually any amplifier. Most power amplifiers and powered monitors require the 10 dB or 20 pad
setting. Use the 0 dB setting with the Benchmark AHB2 power amplifier. The DAC2 DX output
attenuators are factory-set to the 0 dB.
Direct Interfacing to +4 dBu Studio Gear
If the DAC2 DX will be feeding other professional +4 dBu audio gear, the 0 dB setting should be
used. In this setting, the output will reach exactly +24 dBu at 0 dB FS when the volume control is
bypassed or to maximum. In other words, the calibration is +4 dBu at -20 dB FS.
Digital Pass-Through
The second coaxial input (D5) can be reconfigured as a digital output. When operating as an
output, any selected digital input is passed through to (D5) without any processing. Optical,
coaxial, AES XLR, and USB inputs can be passed through to the (D5) connector. This even
includes special digital signals such as DoP, DTS, and Dolby Digital. This feature is particularly
useful for connecting digital devices to computers that are not equipped with coaxial digital
outputs. The DAC2 can connect to the computer via USB and provide a coaxial digital output to
another digital audio device.
Bi-directional 12V Trigger
The 12V trigger can be connected to other audio components so that an entire audio system can
turn on and off in a sequenced fashion. The DAC2 trigger I/O could be connected to a preamplifier,
power amplifier, or both. The DAC2 will drive the trigger I/O to 12 volts DC when the DAC2 turns
on. If an external device pulls the trigger I/O to 12 volts, the DAC2 will turn on. If an external
device pulls the trigger I/O to 0 volts, the DAC2 will turn off. The timing of the trigger system is
optimized to minimize any transient pops and clicks during turn-on and turn-off sequences.
Low-Noise Power Supplies
The DAC2 uses high-efficiency low-noise power supplies. Each critical subsystem has at least one
dedicated low-noise regulator. The unit runs cool while providing substantial power to the
headphone and output drivers. Power can be turned on or off from the front panel, from the
remote control, or from the 12V trigger I/O port.