Grace Design m101 - Microphone Preamp

Grace Design m101 - Microphone Preamp

Grace Design m101 - Microphone Preamp

B&H # GRM101 MFR # AM101
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Product Highlights

  • Single Channel
  • Hi-Z Input
  • Ribbon Mic Mode
  • Internal Power Supply
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Grace Design m101 overview

  • 1Description

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
In the Box
Grace Design m101 - Microphone Preamp
  • AC Power Cable
  • Five (5) Year Warranty (Transferable)
  • Table of Contents
    • 1Description

    Grace Design m101 specs

    Number of Channels Single
    Inputs 1 x XLR Microphone (rear panel)
    1 x 1/4" TRS phone Instrument (front panel)
    Output 1 x XLR
    1 x 1/4" TRS phone
    1 x 1/4" TS phone
    Phantom Power Yes
    Multi Function No
    Gain Range 10dB to 65dB, in 5dB steps
    Output trim control adds 0dB to +10dB
    Maximum Output Level +25dBu, 100kΩ load, 0.1% THD
    Frequency Response Mic Input: 4.5Hz to 390kHz, -3dB @ 40dB gain
    Hi-Z Input: 2.5Hz to 195kHz, -3dB @ 20dB gain
    Noise <-124dB, 600Ω source
    Power Requirements 100~240VAC
    Dimensions (WxDxH) 8.5 x 9.0 x 1.7" (216 x 228 x 43mm)
    Weight 2.4 lbs (1.09 kg)
    Specialties Peak LED meter
    Packaging Info
    Package Weight 4.7 lb
    Box Dimensions (LxWxH) 16.4 x 14.2 x 4.7"

    Grace Design m101 reviews

    m101 - Microphone Preamp is rated 4.9 out of 5 by 12.
    Rated 5 out of 5 by from Great Pre I have been using the M101 for a few months now and I love it. I use it anywhere I need a crisp and clean signal (metal kick, acoustic guitar) However, you better brush up on your mic placement techniques because what you put in this box comes back out just the sameonly louder. Some have complained that the sound coming from this box is sterile but I would chalk that up to poor mics or poor mic placement. (user error!) My favorite use for the 101 is as a bass DI. The instrument input on the front is perfectly tuned for non active pickups. The sound is simply amazing. This little box is definitely worth the price. Jason
    Date published: 2009-04-13
    Rated 5 out of 5 by from Makes anything you plug into it ..better 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.
    Date published: 2012-09-29
    Rated 5 out of 5 by from Most transparent 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.
    Date published: 2011-08-21
    Rated 5 out of 5 by from AWESOME 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
    Date published: 2012-11-26
    Rated 5 out of 5 by from Made my guitar sound awesome The grace design m101 is very much like what you will read about it, clean and detailed. I compared this to the onboard preamps in my Presonus studio live mixer which are also very clean and the grace design had much more body and detail. I tried it with a Shure SM7b and it really brought out the inherent characteristics of the mic. When I plugged my guitar into the HiZ input i could hear all the subtle details of the pickups. I like it a lot.
    Date published: 2010-06-25
    Rated 5 out of 5 by from Straightforward and Low Noise 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.
    Date published: 2013-06-07
    Rated 5 out of 5 by from Will buy again I use this preamp for most tracks. Its very clean as a DI. There is nothing I can say negative about it.
    Date published: 2010-04-08
    Rated 5 out of 5 by from Clean detailed sound, great value I was using a Mackie 800R into a Digi003 to record before buying the Grace M101. I mostly record acoustic guitar tracks. The difference is dramatic. I get a very open spacious detailed sound with the Grace compared to the Mackie. It's well worth the price. The criticism i've heard is that the Grace is extremely accurate and doesn't color the sound in the way the other pre's can. This is exactly what I wanted So I'm very pleased.
    Date published: 2009-12-13
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