Grace Design m101 high fidelity single channel microphone preamplfier
Grace Design m101 high fidelity single channel microphone preamplfier
Grace Design m101 high fidelity single channel microphone preamplfier
Grace Design m101 high fidelity single channel microphone preamplfier

Grace Design m101 high fidelity single channel microphone preamplfier

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One. Perfect. Channel.
Maintaining Grace Design pedigree throughout, the m101 employs our balanced, transformerless, transimpedance circuit topology. With incredible bandwidth and headroom, the m101 is natural, musical and detailed, allowing engineers and musicians to consistently record vibrant, amazing tracks.

The m101 is equipped with our new universal switching power supply, which is dead quiet and accepts input voltages from 100 to 240VAC. The front panel is a tough black anodized / laser etched black, which ensures legibility and usability in varying light conditions. And all preamp functions have a dedicated indicator LED, including the 48V phantom power and HPF switch.

Built in as standard is our unique Ribbon Mic Mode, which bypasses the input decoupling capacitorss, raises the input impedance from 8.1kΩ to 20kΩ, and defeats the 48V phantom power, preventing damage to delicate ribbon mic elements. Ribbon mics, you’re welcome.

The gain range is 10-75dB, including the additional +10dB of gain available with the output trim control. This provides ample gain for use of any type of microphone in any recording situation. The gain control is a presicion gold plated 12 position switch and the circuit path is built with 0.5% metal film resistors.

Included is a HI-Z input on the front panel. Rear panel I/O options include both balanced TRS and unbalanced TS 1/4” outputs, along with the standard XLR balanced out and XLR microphone in.

Equally at home amplifying a vintage condenser mic or a plugged-in acoustic guitar, the m101 delivers the kind of high fidelity performance previously available only to big budget recording studios and Grammy winning musicians. Add it all up while considering that the price is unmatched and the picture becomes pretty clear – the m101 is one little hot rod piece of pro audio gear for the masses.



  • 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
    @ 20dB Gain +20dBu out <0.00085%
    @ 40dB Gain +20dBu out <0.0010%
    @ 60dB Gain +20dBu out <0.0050%
    @ 40dB Gain +20dBu out  
    SMPTE/DIN 4:1 7kHz/50Hz <0.0020
    50Ω source <-130dB
    150Ω source <-128dB
    600Ω source <-124dB
    100Hz >68dB
    1kHz >75dB
    10kHz >65dB
    50Hz-25kHz <6°
    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
    Mic input 8.1kΩ
    Mic input, Ribbon mode 20kΩ
    Hi-Z input (unbalanced) 1MΩ
    Hi-Z input (balanced) 2MΩ
    Balanced Output 300Ω
    Unbalanced Output 150Ω
    Green threshold -14dBu
    Red threshold +16dBu
    100k Ohm load, 0.1% THD +25dBu
    2.4 lbs H1.7” x W8.5” x D9.0”
    1.09 kg H4.3cm x W21.6cm x D22.8cm
    100-240VAC 5 Watts Max
    all specifications subject to change without notice.

    Shipping costs are calculated at time of checkout by our shopping cart, based on the weight of your order and the method of shipment.

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