Grace m101 Owner's Manual

m

101

2434 30th Street, Boulder, CO 80301 USA
tel [phone] fax [phone]
[e-mail] / www.gracedesign.com

single channel microphone preamplifier

owner’s manual Rev A

all contents © Grace Design/ Lunatec LLC

Welcome and thanks for purchasing the Grace Design m101 microphone preamplier and instrument DI. We
design and build our products to be completely reliable and easy to use, so you can concentrate on making
great recordings, not struggling with complicated equipment or dicult product manuals. While you will nd
the m101 is completely straightforward to use, we do ask that you spend a little time familiarizing yourself with
this product manual to help avoid any common user diculties.

In the event that you do encounter any technical diculties with this or any of our products, feel free to call us at
303-443-7454. Our oce hours are 9 to 5, Monday through Friday, MST, or you may email any technical ques­tions to: [e-mail].

Also, please check out our web site (www.gracedesign.com) for the latest Grace Design product information,
owners manuals and technical documents.

Grace Design has been building audiophile-quality products for the recording industry over 15 years. The
technology in the m101 is the result of extensive listening, eld-testing and careful renement. Your new m101
preamplier represents a combination of absolutely pristine audio performance, robust mechanical construction
and bombproof reliability at a reasonable price. Regardless of what audio sources you plan to record, your m101
will faithfully serve as an invisible link between your microphone or instrument and recording device.

We sincerely hope our products help you achieve a new level of excellence in your work!

The Grace Design Team

CONTENTS

IMPORTANT SAFETY INFORMATION 3

GENERAL 3
SAFETY MARKING SYMBOLS 3
SERVICE INFORMATION 3

FEATURES 4

FRONT PANEL FEATURES 4

m101 CONNECTIONS 5

OPERATING THE m101 6

BASIC OPERATION 6
USING ThE TRIM CONTROL 7
USING RIBBON MIC MOdE 7
USING ThE hPF 7
RACKMOUNTING ThE m101 7

CABLE DIAGRAMS 8

BASIC WIRING DIAGRAM 8

SPECIFICATIONS 9

WARRANTY INFORMATION 10

MANUAL REVISIONS 11

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IMPORTANT SAFETY INFORMATION

GENERAL

•Indoor use only

•Ordinary Protection: This equipment should not be exposed to dripping or splashing.

•Avoid placing objects lled with liquids, such as vases or glasses, on this equipment.

•Class I Equipment (grounded type)

•Electrical rating: 100-240V~ 50-60Hz 5W

•Mains supply voltage uctuations are not to exceed ±10% of the nominal supply voltage.

•Pollution Degree 2

•Installation (Overvoltage) Category II for transient overvoltages.

•Maximum Relative Humidity: <80%

•Operation temperature range: 10 °C to 40 °C

•Storage and transportation temperature range –40 °C to 70 °C

•Maximum altitude: 3000m (9843 ft)

•Equipment suitable for continuous operation

•Weight: preamplier 1.09kg (2.4lbs)

SAFETY MARKING SYMBOLS

CAUTION: READ ACCOMPANYING DOCUMENTS

This symbol, located on the equipment and in this manual, refers to important instructions. Read
this manual thoroughly before operating this equipment.

WARNING: ELECTRICAL SHOCK HAZARD

This symbol, located on the equipment and in this manual, indicates the potential for electrical
shock hazard.

SERVICE INFORMATION

The Grace Design m101 contains no user serviceable components. Contact Grace Design for repair and upgrade
information. In the event that your Grace Design m101 needs to be returned to the factory, contact us for a
return authorization number.

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FEATURES

• Fast, musical transimpedance amplier architecture

• Fully balanced, transformerless XLR microphone input

• High impedance 1/4 inch instrument DI input

• Output connectors: XLR balanced, TRS balanced and TS unbalanced

• 12 position precision gold contact rotary switch gain control

• 0.5% precision metal lm resistors in signal path

• High quality conductive plastic 10dB output trim control

• 75Hz 12dB/octave high pass lter

• Two color LED peak meter shows signal present and peak

• Ribbon mic mode (also great for dynamic mics)- Optimizes signal path for ribbon mics

• Aluminum 1/2 width 1U chassis / two units t together in a standard 1U rack tray

• Sealed gold contact relays for signal switching

• High precision active balanced output circuit

• No electrolytic capacitors in the signal path

• Ultra clean 48 Volt phantom power

• Minimal internal signal wiring

• Built in universal AC power supply / no wall-wart!

• 5 year warranty on parts and labor

• Made in the USA

FRONT PANEL FEATURES

HIZ

48V

GAIN

10dB 65dB 0dB

T RIM

+

       

1/4” TRS INSTRUMENT HIZ INPUT



For high-impedance instrument or line level inputs.

48V PHANTOM POWER



This switch provides 48 Volts to power condenser microphones. LED indicator illuminates red when active.

GAIN CONTROL



The gain control has 12 positions and adjusts the voltage gain on the microphone input from 10dB to 65dB in
5dB steps. When using the instrument input, the gain range is –10dB to 45dB in 5dB steps.

ribbon HPF

10 dB

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