The DAC2 DX is the DAC2 of choice for users who do not need analog inputs. The DX is well suited to the needs of professional users and includes an XLR AES digital input. The DAC2 DX is the only DAC2 model that includes dual stereo output buses. The analog output buses can be independently set to fixed or variable gain. The DAC2 DX is also the only DAC2 available with in a rack-mount version.

The DAC2 DX uses digital connections (USB, Optical, Coaxial, or AES) to bypass the low-quality built-in converters that are included in many audio products.

DAC2 converters deliver outstanding musical detail and precise stereo imaging. They employ an advanced high-headroom digital filter design, and a new high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock2™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and includes 3.5 dB of headroom above 0 dBFS. Three balanced 32-bit D/A converter are summed together for the main output bus. Two channels are reserved for the auxiliary RCA output bus.

The DAC2 DX combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All analog outputs are controlled by the rotary volume control unless the volume-control bypass function is selected. This volume control moves in response to commands from the remote control. Audio does not pass through the volume control. The position of the rotary knob is precisely measured, and digital gain coefficients are calculated. The gain coefficients are filtered and passed to a 32-bit high-headroom DSP system. The 32-bit output of this system is connected directly to the array of 32-bit digital to analog converters. This system can provide a wide range of volume control without losing resolution. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.