Grace Design m101 high fidelity single channel microphone preamplfier Grace Design

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.

 

 
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%
INTERMODULATION DISTORTION
@ 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°
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
IMPEDANCE
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
PEAK LED METER
Green threshold	-14dBu
Red threshold	+16dBu
MAXIMUM OUTPUT LEVEL
100k Ohm load, 0.1% THD	+25dBu
WEIGHT and DIMENSIONS
2.4 lbs	H1.7” x W8.5” x D9.0”
1.09 kg	H4.3cm x W21.6cm x D22.8cm
POWER CONSUMPTION
100-240VAC	5 Watts Max
all specifications subject to change without notice.