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Open Box Grace Design M101 Microphone Preamp

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In 2000, the Grace Design model 101 microphone preamp helped fuel a revolution. When people took professional recording into their own hands, it was there with all of the quality and performance of a high-end mic preamplifier, but with a price that made it available to the masses. Eight years later, and the cause moves forward with the newly redesi...  Click To Read More About This Product

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Gear returned in mint condition. If you're looking for a virtually new instrument in possibly less-than-perfect packaging, this is a great value.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Gear returned in great condition, with only minor signs of use, such as slight scuffs or pick marks. It looks and plays like new and may be considered an equivalent to display units found in retail stores.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Open Box Price: $673.20
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In 2000, the Grace Design model 101 microphone preamp helped fuel a revolution. When people took professional recording into their own hands, it was there with all of the quality and performance of a high-end mic preamplifier, but with a price that made it available to the masses. Eight years later, and the cause moves forward with the newly redesigned m101 preamp.

Maintaining Grace Design pedigree throughout, the m101 employs 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 a redesigned universal switching power supply that's dead quiet and accepts input voltages from 100 to 240V AC. 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 Grace's unique Ribbon Mic Mode, which bypasses the input decoupling capacitors, raises the input impedance from 8.1kÎ to 20kÎ, 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 precision 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 everyone from home recording enthusiast to top professional.

Note: For a truly outstanding sound and value, we suggest using the Grace m1011 with the CAD e300 condenser mic (see (#271261) for amazingly clear and detailed, yet warm-sounding vocals.


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
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 1/4" unbalanced
Bombproof laser-etched black anodized front panel
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
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

50 Ohm source: <-130dB
150 Ohm source: <-128dB
600 Ohm 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: 8.1kOHM
Mic input, Ribbon mode: 20k Ohm
Hi-Z input (unbalanced): 1M Ohm
Hi-Z input (balanced): 2M Ohm
Balanced Output: 300 Ohm
Balanced Output: 150 Ohm

Green threshold: -14dBu
Red threshold: +16dBu

100k Ohm load, 0.1% THD: +25dBu

2.4 lb. H1.7" x W8.5" x D9.0"
1.09 kg H4.3cm x W21.6cm x D22.8cm

100-240V AC: 5 Watts Max
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Customer Reviews
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Grace DesignM101 Microphone Preamp

(based on 1 review)

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Reviewed by 1 customer

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(12 of 12 customers found this review helpful)


It Gave Me the Mic Sound I Was Missing

By Mel

from Tulsa, OK

Comments about Grace Design M101 Microphone Preamp:

I had made quite an investment in a DAW, an interface with built-in preamps that were described as "boutique quality" and a variety of well-known microphones...and I still couldn't achieve the quality kind of voice-over and vocal sound I wanted. I felt like my mics were being "colored" in a way that was not pleasing to my ears. Then...I bought a Grace Design m101 Microphone Preamp. Suddenly, my mics sounded clearer. I was finally hearing the kind of clean quality I wanted to hear through my microphones. If I want to "dirty up" the sound, I have many ways to do it with hardware and software processing; I don't need a mic preamp to do it for me. The controls on the Grace m101 are incredibly simple and easy to operate. And the flexibility is perfect. Phantom power, no phantom power, ribbon mic preamping, a switchable high pass filter...everything I needed in a mic an excellent price. For less than 600 bucks, I made my mics sound like a million bucks!

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