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Welcome and thanks for purchasing the Grace Design m501 microphone 500 series preamplifier 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 difficult
product manuals. While you will find the m501 is completely straightforward to use, we do ask that you
spend a little time familiarizing yourself with this product manual to help avoid any difficulties.
In the event that you do encounter any issues with this or any of our products, feel free to call us at
303-443-7454. Our office hours are 9 to 5, Monday through Friday, MST, or you may email any technical
questions to: [email protected].
Also, please check out our web site (www.gracedesign.com) for the latest Grace Design product infor-
mation, owners manuals and technical documents.
Grace Design has been building audiophile-quality products for the recording industry over 15 years.
The technology in the m501 is the result of extensive listening, field-testing and careful refinement.
Your new m501 preamplifier 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 m501 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
m501 connectIonS
5
BASIC OPERATION
6
USING ThE TRIM CONTROL
6
USING RIBBON MIC MOdE
6
USING ThE hPF
6
cable DIagramS
7
baSIc WIrIng DIagram
7
carD eDge connector contact aSSIgnmentS
7
SpecIfIcatIonS
8
Warranty InformatIon
9
manUal revISIonS
10
