Grace Design m101

Grace Design m101 Microphone Preamplifier

The Grace Design m101 is a high-fidelity single-channel microphone preamplifier with a transformerless design, delivering exceptional clarity and detail. It features a wide gain range, ribbon mic mode, universal power supply, and versatile connectivity. Built with a durable black anodised front panel and precise controls, it offers professional-grade performance for studio and live applications.

Grace Design m101 Microphone Preamplifier Details

The Grace Design m101 is a single-channel microphone preamplifier designed to deliver exceptional clarity, musicality, and detail. It features a balanced, transformerless, transimpedance circuit topology that ensures outstanding bandwidth and headroom, making it an ideal choice for capturing professional-quality recordings. The unit includes a universal power supply that accepts voltages from 100 to 240VAC, ensuring quiet and reliable operation in any studio or live environment.

For ribbon microphones, the Grace Design m101 offers a dedicated mode that optimises performance by bypassing input decoupling capacitors, increasing input impedance from 8.1kΩ to 20kΩ, and disabling 48V phantom power to protect delicate ribbon elements. The preamplifier provides a wide gain range of 10-75dB, adjusted via a precision 12-position gold-plated rotary switch, with an additional +10dB available through the output trim control.

Connectivity options include a front-panel HI-Z input for instruments, along with rear-panel balanced TRS, unbalanced TS 1/4-inch, and standard XLR inputs and outputs, offering flexibility for various studio and live applications. The front panel is made from durable black anodised material with laser-etched labeling for long-lasting legibility. Each function is clearly indicated by dedicated LED indicators, including those for phantom power and the high-pass filter.

Designed to complement a wide range of microphones, from vintage condensers to modern dynamics and ribbons, the Grace Design m101 delivers the level of high-fidelity performance typically found in high-end studio equipment. Its combination of pristine sound quality, rugged construction, and versatility makes it an essential tool for recording professionals and musicians seeking premium audio performance.

Features

  • Fast and musical transimpedance architecture
  • Updated audio path with 0.5% precision metal film resistors
  • New 12 position gold plated rotary gain switch
  • High performance output line driver amplifier and HPF amplifier
  • New Ribbon mic mode (also great for dynamic mics)- Relay bypass of phantom power decoupling capacitors, increased
  • input impedance, and 48V lockout
  • Wider 10-75dB gain range
  • Enhanced RFI interference suppression
  • Three output connectors: XLR balanced, TRS balanced and ¼” unbalanced
  • Bombproof laser-etched black anodized frontpanel
  • Sealed gold contact relay for Hi-Z input switching
  • Built in power supply / no wall-wart!
  • Led indicators for +48V, Ribbon mode, and HPF
  • Five year warranty on parts and labor
  • Made in the USA

Specifications

  • Gain range (5dB steps):
    • Mic input: 10-65dB
    • Hi-Z input: -10-45dB
    • Output trim control: 0 to +10dB
  • THD+N:
    • @ 20dB gain, +20dBu out: <0.00085%
    • @ 40dB gain, +20dBu out: <0.0010%
    • @ 60dB gain, +20dBu out: <0.0050%
  • IMD @ 40dB gain, +20dBu out, SMPTE/DIN 4:1 7kHz/50Hz: <0.0020%
  • Noise – referred to input:
    • 50Ω source: <-130dB
    • 150Ω source: <-128dB
    • 600Ω source: <-124dB
  • CMRR:
    • 100Hz: >68dB
    • 1kHz: <75dB
    • 10kHz: <65dB
  • Phase deviation (HPF off) 50Hz-25kHz: <6 degrees
  • Frequency response:
    • Mic input @ 40dB gain -3dB: 4.5Hz-390kHz
    • Mic input @ 40dB gain -0.5dB: 10.5Hz-140kHz
    • Hi-Z input @ 20dB gain -3dB: 2.5Hz-195kHz
    • Hi-Z input @ 20dB gain -0.5dB: 6Hz-74kHz
  • Impedances:
    • Mic input: 8.1kΩ
    • Mic input (ribbon mode): 20kΩ
    • Hi-Z input (unbalanced): 1MΩ
    • Hi-Z input (balanced): 2MΩ
    • Balanced outputs: 300Ω
    • Unbalanced outputs: 150Ω
  • Maximum output level:
    • 100kΩ load, 0.1% THD: +25dBu
  • Dimensions: 43mm x 216mm x 228mm
  • Weight: 1.09 kg

The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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