Grace Design M801MK2 8-Channel Analog Microphone Preamplifier

Grace Design's m801mk2 is the next generation of their previously released Model 801 microphone preamplifier efforts. The newly designed amplifier circuitry adds to the features of the previous versions while significantly improving noise performance at low gains, increasing low frequency bandwidth for improved phase response, improving RFI/EMI immunity for today’s ever noisier world,⁴and eliminating the external DC power supply for a cleaner, simpler design.⁵

Today’s modern recording studio is invariably loaded with incredible sonic processing capability, making the opportunity to add great sounding color routine. But capturing the magic at the front end is still the job of skillfully designed analog hardware, for which there is no substitute. This makes Grace Design's preamps more relevant than ever. If your source sounds great and your mic is plugged into the m801mk2, you’ll be rewarded with a recording of breathtaking depth and realism. If you choose to color it up from there, you’ll be starting with the best possible raw material you can get.

Preliminary Specifications

• Frequency Response:
  • @ 20dB gain ± 3dB 150Ω source: 3.2Hz-530kHz
  • @ 20dB gain ± 0.2dB 150Ω source: 14.8Hz-109kHz
  • @ 40dB gain ± 3dB 150Ω source: 3.2Hz-500kHz
  • @ 40dB gain ± 0.2dB 150Ω source: 15.4Hz-103kHz
• THD+N 22-22kHz:
  • @ 20dB gain +20dBu out, 1kHz:
  • @ 40dB gain +20dBu out, 1kHz:
  • @ 60dB gain +20dBu out, 1kHz:
• Intermodulation Distortion:
  • @40dB gain +20dBu out:
  • SMPTE/DIN 1:1 (50Hz, 7kHz):
  • SMPTE/DIN 4:1 (50Hz, 7kHz):
• Noise – Referred to Input:
  • @60dB gain 50Ω source: -130dB
  • @60dB gain 150Ω source: -127dB
  • @60dB gain 600Ω source: -123dB
• Phase Deviation:
  • 100-20KHz @40dB gain:
• Crosstalk Any Channel:
  • Any Channel @40dB gain 1kHz: -140dB
  • Any Channel @40dB gain 10kHz: -130dB
• CMRR:
  • @60dB gain, 3.5Vcm, 1KHz: >85dB
  • @60dB gain, 3.5Vcm, 10KHz: >75dB
• Phantom Power:
  • Voltage +48V: +0.9/ -0.0
  • 6.8kΩ resistor match tolerance: +/- 0.1%
  • Maximum Output Level
  • 1kHz, 100KΩ load: +28dBu
• Impedence:
  • Input: 8100Ω
  • Input, Ribbon Mode: 20kΩ
  • Input, Pad Engaged: 1.3KΩ
  • Output: 150KΩ
• Dimensions:
  • Weight: 13lbs (5.9kg)
  • Height: 2U
  • Width: 19″
  • Depth: 10″
• Power Consumption:
  • 100-240VAC 50/60Hz: 40 Watts max

Notes

• 4. Your cell phone, WiFi antennas, bluetooth devices, and other transmissions - that stuff can sneak into your audio and cause problems.
• 5. The new, carefully designed universal switch mode power supply is quiet, light and conveniently operates on mains voltages from 100-240VAC.