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The AD Option for m201 from Grace Designs is a two channel analog-to-digital converter module option for the m201 microphone preamp. The module provides low-latency 24-bit/192kHz conversion and delivers a high level of sonic clarity, detail and nuance.
Either the microphone preamp section, or the M+S matrix can be routed to the converter input directly for use in standard recording applications. Using the additional analog line inputs, the microphone preamplifier and A/D converter sections can be used separately, allowing for external processing to be inserted between the preamp and the converter.
External Wordclock or Digidesign LoopSync synchronization is available utilizing a proprietary dual stage PPL with s-Lock, for extremely low jitter and greater stability. Two independent A/D sensitivity configurations are available from the front panel, allowing the user to easily switch between two calibrated settings, each of which can be configured to one of four provided standard A/D sensitivities.
Note: The module is field installable but requires a competent technician for installation.
Low latency analog-to-digital converter capable of up to 24-bit/192kHz operation
Selectable input source include microphone preamp channels 1 and 2, MS matrix L-R output and external balanced line inputs
Four output connectors types - AES3 on XLR, AES3-id/S/PDIF on BNC, and TOSLink optical
External synchronization to Wordclock or Digidesign LoopSync
Dual stage PLL clock recovery. Wide range low noise VCO based PLL followed by Grace's crystal based s-Lock ultra low jitter PLL
Two input sensitivities selectable on the front panel, each is independently calibrated
Twenty-segment peak reading LED meters show 60dB range
AES3 outputs can be configured for single or dual wire operation
Four standard sensitivities are supported: +18dBu = 0dBFS (14dB headroom), +20dBu = 0dBFS (16dB headroom), +22dBu = 0dBFS (18dB headroom), +24dBu = 0dBFS (20dB headroom)
In the Box
Grace Design AD Option for m201
Five (5) Year Warranty
Table of Contents
Internal: 44.1, 48, 88.2, 96, 176.4 and 192kHz External: 40.1kHz to 207kHz (+/-8% at each sample rate) in Wide lock mode
Internal through preamp 2 x XLR Line
Digital Input Connectors
Digital Output Connectors
2 x XLR AES/EBU 1 x BNC coaxial S/PDIF 1 x TOSLink optical S/PDIF
2 x BNC I/O
117dB, A-weighted (20Hz to 20kHz)
10Hz to 20kHz, +/- 0.2dB (at 44.1kHz)
THD + N
<0.00026% (-112dB), 1kHz, -1dBFS, 20Hz to 22kHz
Not specified by manufacturer
Not specified by manufacturer
Capable of transmitting AES/EBU digital audio in single
or dual wire modes, and in either professional or consumer format