DISC Benchmark DAC1USB Digital to Analogue Converter, Black

Full Description

The DAC1USB features Benchmark's Ultralock™ technology, which removes virtually all jitter on any digital input signal. It accepts any input frequency between 24 and 195kHz and is fully compatible with variable-pitch applications.

AdvancedUSB Audio™ technology supports 24-bit audio at up to 96kHz, and transfers every sample of digital audio from the computer to the DAC1USB without modification. Compatible with Windows 7/Vista/XP/2000 and Max OS X, it is a true plug-and-play device that works without any need for drivers or software.

The HPA2™ headphone power amplifier is capable of driving a wide variety of headphone loads with less than 0.0003% distortion under load. It drives the DAC1USB's two 1/4" headphone jacks. The gain control sets the output level of the headphone jacks, and also controls the output level of the balanced XLR and unbalanced RCA analogue outputs.

This model of the DAC1USB is designed for rack mounting. It occupies half of a rack space, and can be mounted alone using Benchmark's rack mount kit, or in conjunction with another Benchmark module using the rack mount coupler.

Features/Specifications:

Digital Inputs:

• Number of Digital Inputs (Switch Selected): 3 (XLR, Coaxial, Optical)
• Number of Audio Channels: 2
• Input Sample Frequency Range: 28 - 195kHz (XLR, Coaxial), 28 - 96kHz (Optical)
• Maximum Input Word Length: 24 Bits
• Digital Input Impedance on XLR Input: 110 Ohms
• Digital Input Impedance on Coaxial Input (Jumper Selected): 75 Ohms or Hi-Z (Bridging)
• Transformer Coupled Digital Inputs: Yes
• DC Blocking Capacitors on Digital Inputs: Yes
• Transient and Over-Voltage Protection on Digital Inputs: Yes
• Minimum Digital Input Level: 300mVpp on XLR, 150mVpp on Coaxial
• Jitter Tolerance (With No Measurable Change in Performance):
  • >12.75 UI Sine, 100Hz - 10kHz
  • >3.5 UI Sine at 20kHz
  • >1.2 UI Sine at 40kHz
  • >0.4 UI Sine at 80kHz
  • >0.29 UI Sine at 90kHz
  • 0.25 UI Sine Above 160kHz
• Jitter Attenuation Method: Benchmark UltraLock™

Balanced Analogue Outputs:

• Number of Balanced Analogue Outputs: 2
• Output Connector: Gold-Pin Neutrik™ Male XLR
• Output Impedance: 60 Ohms
• Output Level Calibration Controls: 10-Turn Trimmers
• Calibration Adjustability: 2dB / Turn
• Output Level Range (at 0dBFS) in Calibrated Mode:
  • +9dBu to +29dBu (Attenuator Off)
  • -1dBu to +19dBu (Attenuator = 10dB)
  • -11dBu to +9dBu (Attenuator = 20dB)
  • -21dBu to -1dBu (Attenuator = 30dB)
• Output Level Range (at 0dBFS) in Variable Mode:
  • Off to +27dBu (Attenuator Off)
  • Off to +17dBu (Attenuator = 10dB)
  • Off to +7 dBu (Attenuator = 20dB)
  • Off to -3dBu (Attenuator = 30dB)
• Output Level Variation with Sample Rate (44.1kHz vs 96kHz): < +/- 0.006dB

Unbalanced Analogue Outputs:

• Number of Unbalanced Analogue Outputs: 2
• Output Connector: RCA
• Output Impedance: 30 Ohms
• Output Level Calibration Controls: Shared with Balanced Outputs
• Output Level Range (at 0dBFS) in Calibrated Mode: -6dBu to +13.5dBu
• Output Level Range (at 0dBFS) in Variable Mode: Off to +11dBu
• Calibration Adjustability: 2dB / Turn
• Output Level Variation with Sample Rate (44.1kHz vs 96kHz): < +/- 0.006dB
• Factory Preset: 2vRMS (8.2dBu)

HPA2 Headphone Outputs:

• Number of Headphone Outputs: 2
• Output Connector: 1/4" TRS
• Output Impedance: 0 Ohms
• Output Level Control: Stereo Control on Front Panel
• Output Level Range (at 0dBFS) into 60 Ohm Load: Off to +21dBu