01 m5 2434 30th Street, Boulder, CO 80301 USA tel 303.443.7454 fax 303.444.4634 info@gracedesign.com / www.gracedesign.
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.
Important Safety Information GENERAL •Indoor use only •Ordinary Protection: This equipment should not be exposed to dripping or splashing. •Avoid placing objects filled with liquids, such as vases or glasses, on this equipment. •Pollution Degree 2 •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: preamplifier 0.31kg (.
FEATURES • • • • • • • • • • • • • • • • • • Fast, musical transimpedance amplifier architecture Fully balanced, transformerless XLR microphone input High impedance 1/4 inch instrument DI input 12 position precision gold contact rotary switch gain control 0.
m501 connections MICROPHONE INPUT The mic input is located on the back of your 500 series rack. This connector should be wired pin 2 positive, pin 3 negative and pin 1 ground (check with your rack manufacturer’s documentation for connector details). 48V phantom power, if used, is supplied on pins 2 and 3. BALANCED XLR OUTPUT Balanced XLR line output connector are located on the back of your 500 series rack.
OPERATING THE m501 BASIC OPERATION Turn the gain and trim controls fully counter-clockwise and check that the +48V phantom power is off. Connect the microphone to the preamplifier and then turn on the phantom power switch on if required. When sending a signal to a recorder that has fixed input levels, simply increase the gain until the optimum recording level is reached.
Cable Diagrams Use this cable when connecting the balanced XLR output to an unbalanced, 1/4” input. Balanced Output XLR Unbalanced 1/4” HOT 1 2 GROUND SHIELD 3 (OPEN) Basic Wiring Diagram The following is a basic overview of common wiring possibilities for the m501. All applications will vary, so please feel free to contact your dealer or us directly for setup and wiring information.
specifications GAIN RANGE (5dB steps) Mic input Hi-Z input Output trim control 10 - 65dB -10 - 45dB 0 to +10dB THD+N (1kHz, 22Hz-22kHz BW) @ 20dB Gain +20dBu out @ 40dB Gain +20dBu out @ 60dB Gain +20dBu out <0.00085% <0.0010% <0.0050% INTERMODULATION DISTORTION (@ 40dB Gain, +20dBu out) SMPTE/DIN 4:1 7kHz/50Hz <0.0020 NOISE - REFERRED TO INPUT 50Ω source 150Ω source 600Ω source <-130dB <-128dB <-124dB CMRR (@60dB Gain, 3.
warranty information Grace Design warrants all of our products to be free of defective parts and workmanship for a period of five years. This warranty period begins at the original date of purchase and is transferable to any person who may subsequently purchase the product during this time. This warranty excludes the following conditions: normal wear and tear, misuse, customer negligence, accidental damage, unauthorized repair or modification, cosmetic damage and damage incurred during shipment.
Manual Revisions 501 m Revision Page A all page 10 Change Date Initials 9/15/09 edg
