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The ADC1 USB from Benchmark is a two-channel, 24-bit, 192kHz analog-to-digital audio converter that pushes the limits of conversion technology and yet maintains an affordable price point. Digital audio created by the converter provides an amazingly faithful recreation of the input signal.
The converter features Benchmark's phase-accurate UltraLock clock system along with multi-function clock input and word clock output, as well as nine-segment, dual-range digital LED metering. A total of five digital outputs (1 XLR, 2 coaxial, 1 optical and 1 USB) can operate simultaneously at up to three independent sample rates. One of the five outputs can be configured for 16-bit TPDF dithered output.
The ADC1 USB performs gracefully in the presence of errors and interruptions at the clock reference input. The unit will even lock to an AES/EBU signal that has its sample-rate bit status set incorrectly since the sample rate is determined by measuring the incoming signal. Lack of sample rate status bits or incorrectly set status bits will not cause loss of audio.
The converter is designed for maximum transparency and is well suited for the most demanding applications in studio control rooms and in mastering rooms. The compact and rugged enclosure makes the unit an excellent choice for location recording, broadcast facilities and mobile trucks. An internal power supply supports all international voltages and has generous margins for over and under voltage conditions.
Note: The 110V model has the same switchable universal power supply as the 220V version, but is factory set to the correct voltage for each model. Operating voltage settings in both models can be changed in the field by rotating the fuse assembly.
Two analog-to-digital conversion channels
Total jitter immunity with Benchmark's phase-accurate UltraLock technology
Two XLR balanced analog inputs providing high-performance over a 43dB range
-14dBu to +29dBu input sensitivity range (at 0dBFS)
0dB, 10dB and 20dB first-stage gain switches, one per channel
Forty-one detent gain controls with a 20dB range, one per channel
Ten-turn gain calibration controls with a 20dB range, one per channel
Benchmark's nine-segment dual-range digital LED meters
Sample Rate LED indicators
Conversion at 44.1, 48, 88.2, 96, 176.4, and 192kHz
Versatile Auto and Internal clock modes
Multi-function clock input with auto-recognition of AES, S/PDIF, Wordclock, or Superclock
Simultaneous output at up to three different sample rates
Simultaneous 16- and 24-bit outputs
Five digital outputs (1 XLR, 2 Coaxial, 1 Optical and 1 USB)
AES/EBU, ADAT, and ADAT S/MUX2, and ADAT S/MUX4 output formats
Reliable and consistent performance under all operating conditions
Internal 115V, 230V, 50-60Hz international power supply with very wide operating range
Low radiation toroidal power transformer significantly reduces hum and line related interference
Meets FCC Class B and CE emissions requirements
In the Box
Benchmark ADC1 USB - Two-Channel A/D Converter with Rack Ears - (110V) Black
AC Power Cable
3 x BNC to RCA Adapters
Five (5) Year Warranty on Registration to Original Purchaser
Table of Contents
44.1, 48, 88.2, 96, 176.4 and 192kHz @ 24-bits (Main Output) 44.1 or 48kHz, 16 or 24-bit (Secondary Output)
2 x XLR
Digital Input Connectors
Digital Output Connectors
1 x XLR AES/EBU 1 x BNC AES, S/PDIF (primary) 1 x TosLink (ADAT or S/PDIF) 192kHz capable 1 x BNC S/PDIF (secondary) 1 x USB 1.1 (compatible with USB 2.0)
1 x BNC input (AES, S/PDIF, Word Clock or Super Clock) 1 x BNC Word Clock output
2Hz to 92kHz, -3dB/+0dB @ 192kHz
THD + N
-106dBFS, -103dB (0.00071%) 20Hz to 20kHz test tone at -3dBFS
9.5 x 8.5 x 1.73" (241 x 216 x 44mm)
3.6 lbs (1.6kg)
Wide AC-voltage operating range with international voltage select