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The ADC1 USB is a 2-channel 192-kHz 24-bit analog-to-digital audio converter with an unprecedented feature set. This converter was designed to consistently deliver reference quality conversion in 'real-world' conditions. It features Benchmark's jitter-immune UltraLock™ clock system and an extraordinary analog front-end.
The UltraLock™ system delivers consistent, high-quality conversion even when slaved to a poor quality external clock. The performance of the ADC1 USB will not degrade when slaved to an external clock - a claim very few converters can make. Enjoy the convenience of a clock input that automatically recognizes AES/EBU, S/PDIF, Word Clock, or Super Clock sources - all with the unsurpassed jitter immunity of Benchmark's UltraLock™ clock-isolation system.
Benchmark has a long tradition of building ultra-high performance analog circuits that are designed for maximum transparency. The ADC1 USB extends this tradition by pushing performance to the limits of today's technology. The analog front-end delivers low-noise low-distortion high-bandwidth performance over a wide gain range (45dB). Precise gain and calibration controls allow for accurate channel matching. The ADC1 captures precise imaging, subtle details, and difficult transients - all with stunning realism.
The nine-segment dual-range, digital LED meters enable high-precision level monitoring. Meter response times are matched to the response of the human eye so that every peak is clearly visible. All metering is fully-digital and is not subject to calibration errors. A peak hold function allows an infinite hold to verify that an over has not occurred. Dual ranges allow signal presence monitoring, or precise headroom indication. The meters even use an upsampling technique to detect and display inter-sample peak overloads. This upsampled metering warns of potential overloads that may not be detected by conventional digital meters.
SNR – A-Weighted, 0 dBFS = +16 to +29 dBu 121 dB
SNR – Unweighted, 0 dBFS = +16 to +29 dBu 119 dB
SNR – A-Weighted at max gain, 0 dBFS = -10 dBv 117 dB
THD+N, 1 kHz at –1 dBFS -102 dBFS, -101 dB, 0.00089%
THD+N, 1 kHz at –3 dBFS -107 dBFS, -104 dB, 0.00063%
THD+N, 20 to 20 kHz test tone at –3 dBFS -106 dBFS, -103 dB, 0.00071%
Frequency Response at Fs=192 kHz -3 dB, +0 dB, 2 Hz to 94 kHz
+/- 0.01 dB, 20 Hz to 20 kHz