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Grace Design m101 - Microphone Preamp

BH #GRM101 • MFR #AM101
Grace Design
Grace Design m101 - Microphone Preamp
Key Features
  • Single Channel
  • Hi-Z Input
  • Ribbon Mic Mode
  • Internal Power Supply
The m101 from Grace Design is a single-channel microphone preamplifier that uses the same fast, musical transimpedance amplifier architecture as the model 801 and model 201, but packaged and priced to be within the reach of any recording engineer, musician or studio. The preamp now employs 0.5% precision metal film resistors.
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Grace Design m101 Overview

The m101 from Grace Design is a single-channel microphone preamplifier that uses the same fast, musical transimpedance amplifier architecture as the model 801 and model 201, but packaged and priced to be within the reach of any recording engineer, musician or studio. The preamp now employs 0.5% precision metal film resistors.

An upgrade from the model 101, the unit still employs fully balanced, transformerless circuit topology and has no electrolytic capacitors in the signal path. With incredible bandwidth, headroom and resolution, the unit is remarkably natural, musical and detailed. A universal power supply is internally mounted.

The m101 features a ribbon microphone mode which provides additional gain that is usually required by that type of microphone. Pushing the dedicated ribbon switch does three things. Phantom power is locked-out to prevent potential damage to ribbon microphones, the impedance of the microphone input is raised from 8.1kΩ to 20kΩ, and the 48V DC blocking input capacitors are bypassed with sealed gold contact relays.

The included instrument DI input is designed to accommodate a wide variety of high impedance input sources, making the unit an excellent choice as a DI box which will flawlessly preserve the sound of any plugged-in instrument while imparting lackluster sounding instrument pickups with clarity and detail.

Fully balanced, transformerless, single-channel microphone preamp with optimized DI instrument input
Fast, musical transimpedance amplifier architecture
Updated audio path with 0.5% precision metal film resistors
Built-in switchable 75Hz, 12dB/8ve high pass filter
Precision 12-position, gold contact, rotary switch gain control
10 to 75dB gain range
10dB output trim controls for fine level adjustment
Switchable 48V phantom power
Ribbon microphone mode with an optimized signal path
Input impedance, and 48V lockout
No electrolytic capacitors in the signal path
Enhanced RFI interference suppression
Sealed gold contact relays for all signal switching
Minimal internal signal wiring
Three output connectors: XLR balanced, TRS balanced and 1/4" unbalanced
Two color, bi-phase LED peak indicator
Internal, universal power supply
Made in the USA
UPC: 823821110105

Grace Design m101 Specs

Number of ChannelsSingle
Inputs1 x XLR Microphone (rear panel)
1 x 1/4" TRS phone Instrument (front panel)
Output1 x XLR
1 x 1/4" TRS phone
1 x 1/4" TS phone
Phantom PowerYes
Multi FunctionNo
Gain Range10dB to 65dB, in 5dB steps
Output trim control adds 0dB to +10dB
Maximum Output Level+25dBu, 100kΩ load, 0.1% THD
Frequency ResponseMic Input: 4.5Hz to 390kHz, -3dB @ 40dB gain
Hi-Z Input: 2.5Hz to 195kHz, -3dB @ 20dB gain
Noise<-124dB, 600Ω source
Power Requirements100~240VAC
Dimensions8.5 x 9.0 x 1.7" (216 x 228 x 43mm)
Weight2.4 lbs (1.09 kg)
SpecialtiesPeak LED meter
Packaging Info
Package Weight4.7 lb
Box Dimensions (LxWxH)16.4 x 14.2 x 4.7"

Grace Design m101 Reviews

Clean sound

By Cheuk Fang Rich
Rated 5 out of 5
Date: 2021-07-02

Very clean and clear sound. Good features and good DI performance. Recommended.

Straightforward and Low Noise

By edma
Rated 5 out of 5
Date: 2013-06-07

I use these with MXL 603s's. Now it's time to look into better mics and a sound-insulated room. I tried no mics and got much much less noise, then 100 ohms across the signal pins and got even less noise. Didn't measure the noise; merely listening, with headphones, to the output amplified by a Panasonic HDC-Z10000. I like the idea of the rotary switch, instead of a pot, for the gain control. It has a pot for the trim control, so it has the best of both worlds. Construction is very good with high-quality connectors and controls. It's pretty cool to have a five-year transferable warranty.


By Anonymous
Rated 5 out of 5
Date: 2013-01-22

The Grace 101 is a bargain. For beginner or expert you can't go wrong. Portable enough to take with you and a must in studio. Very easy to use with amazing sound. COZ ((VOICE)


By cartel
Rated 5 out of 5
Date: 2012-11-26

this is the best preamp value on the market that ive found.....used a avalon in a friends studio, and owned a ua la-610 in my own studio....both of these preamps are 1500 dollars or more, and are not as clean and crisp sounding as the grace designs preamp....and where other preamps take a degree to figure out how they work, and take a LONG TIME to get set to prefrence, this little gem is SIMPLE and very EASY to fine tune....for under seven hundred dollars, this is a professional preamp needed to make the leap from home studio to professional turnkey studio, and buy it from BHPHOTO, they are the best

Makes anything you plug into it ..better

By OnewithGuy
Rated 5 out of 5
Date: 2012-09-29

All of the equipment and software I have purchased I never woke up to learning how much difference a pre-amp at this level makes. Instruments: Bass guitar, lead guitar, acoustic guitar - it is amazing the fullness it pulls out of these instruments, and that is fullness with headroom. A great addition for voiceovers.Now on the microphones: tested on our condenser mics (Schoeps and AT 4053b) and our Dynamic (Beyerdynamic, Shure) mics. It is hard to put into words the differences. Present system: ProTools, Focusrite Saffire 56, ArtPro Channel pre's, Presonus pre's. This is a game changer investment. Spend it here before you drop the extra $ on the mic.

Most transparent

By T&T Dale
Rated 5 out of 5
Date: 2011-08-21

I am well pleased with the Grace Design m101 mic preamp. I recorded vocals & guitar using the AKG C3000 through the Grace Design m101 then into my Apogee A/D converters. WOW! The m101 is certainly the most transparent mic preamp, in the price range, that I have heard. The signal to noise ratio on this unit is extremely high. I did a recording in a noisy room, using the microphone close to sound source and the recorded signal had very little ambient noise. Moreover, the signal that I captured through m101 sounded clean and full. It accurately represented the sound source.

This preamp is outstanding!

By Theodore
Rated 5 out of 5
Date: 2021-03-01

I'm using the Grace Design M101 to boost my Sure SM7B mic. It plugs into a UAD Apollo Twin Duo X Thunderbolt which plugs into my MacBook. I do conversation level voice recording for online course creation. I get more clear gain than I need for my mic, which outputs notoriously low signal. If you're in the market for an outstanding preamp and are OK with the price, this is an option worth exploring.


By Anonymous
Rated 5 out of 5
Date: 2015-01-14

Good stock.

See any errors on this page? Let us know


What about an Apollo Twin Duo? Can I get the ...

What about an Apollo Twin Duo? Can I get the benefit of a mic preamp, or are only the apollo's own presets available to me?
Asked by: rich
This interface offers: 2 Unison Mic Preamps, 1 Hi-Z Input Using the emulations is optional: The interface features two XLR-1/4&quot; mic/line combo inputs and a 1/4&quot; Hi-Z input, all with Unison integration for precise UAD emulations of classic analog preamps&mdash;impart vintage character of your choosing on microphone and instrument recordings while bypassing the unpredictable nature of old equipment.
Answered by: Mark
Date published: 2021-06-21


Is set up difficult?
Asked by: Anonymous
From what I can see it's plug and play you have one instrument input and one mic input +phantom power but this a preamp only you will need n amplifier
Answered by: Michel R.
Date published: 2018-08-27

Hi I have apollo twin x (Quad) and i have buy ...

Hi I have apollo twin x (Quad) and i have buy preamp GRACE m101 . Should I have Converter between these two equipment? If yes What is it the best converter for voiceover and for this equipment??
Asked by: Saif
A converter is not necessary. Simply come out of the 1/4-inch TRS balanced output to the 1/4-inch portion of the combo input of the Apollo Twin X Quad. It is important to send the signal into the Apollo as a line level signal, to take advantage of the Grace preamp.. A Pearstone PM-TRS 1/4&quot; TRS Male to 1/4&quot; TRS Male Interconnect Cable (6'),BH #PEPMTRS06 would be a good choice for a balanced cable.
Answered by: Steve
Date published: 2020-08-27

This preamp have warranty?

This preamp have warranty?
Asked by: Saif
This mic preamp comes with a five year, transferable warranty from Grace Design.
Answered by: Steve
Date published: 2020-08-06
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