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Grace m501, Owner'S Manual

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Grace m501 Owner'S Manual Download Page 1

500 series microphone preamplifier module

m

5

01

all contents © Grace Design/ Lunatec LLC

owner’s manual Rev A

2434 30th Street, Boulder, CO 80301 USA 

tel 303.443.7454 fax 303.444.4634

[email protected] / www.gracedesign.com

Summary of Contents for m501

Page 1: ...es microphone preamplifier module m501 all contents Grace Design Lunatec LLC owner s manual Rev A 2434 30th Street Boulder CO 80301 USA tel 303 443 7454 fax 303 444 4634 info gracedesign com www gracedesign com ...

Page 2: ...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 p...

Page 3: ... operation Weight preamplifier 0 31kg 7lbs SAFETY MARKING SYMBOLS CAUTION READACCOMPANYINGDOCUMENTS This symbol located on the equipment and in this manual refers to important instructions Read this manual thoroughly before operating this equipment WARNING ELECTRICALSHOCKHAZARD This symbol located on the equipment and in this manual indicates the potential for electrical shock hazard SERVICE INFOR...

Page 4: ...r warranty on parts and labor Made in the USA PEAK INDICATOR The LED peak indicator which monitors the signal at the output of the pream plifier illuminates green at 14dBu and red at 16dB 10dB before clipping GAIN CONTROL The gain control has 12 positions and adjusts the voltage gain on the micro phone input from 10dB to 65dB in 5dB steps When using the instrument input the gain range is 10dB to 4...

Page 5: ... instrument input is 10dB to 55dB Using the instrument input with an unbalanced source is simple When a mono jack is used the sleeve will automatically ground the inverting input ring when plugged in Installing the m501 in a 500 series rack Open your m501 box The module is in a bag under the plastic korvu retain 1 ing sheet which you should be careful not to cut Simply fold down the outer cardboar...

Page 6: ...clockwise Using ribbon mic mode Pushing the ribbon switch does three things 48V phantom power is locked out to prevent potential damage to ribbon microphones the impedance of the mic input is raised from 8 1k Ohms to 20k Ohms and the 48V DC blocking input capacitors are bypassed with sealed gold contact relays The maximum gain available on the m501 is 75dB which is achieved by setting the gain con...

Page 7: ...nterface Mixer PA system 10 dB 1 m 50 GAIN TRIM HI Z 48V ribbon HPF 10 dB 10 dB 0 dB 0 dB 10 dB 65 dB 65 dB m501 frontpanel 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 card edge connector contact assignments 1 Chassis Ground 2 ...

Page 8: ...50Hz 25kHz 40dB Gain 10 FREQUENCY RESPONSE Mic input 40dB Gain 3dB 3 8Hz 288kHz Mic input 40dB Gain 0 5dB 8 35Hz 135kHz Hi Z input 20dB Gain 3dB 1 7Hz 180kHz Hi Z input 20dB Gain 0 5dB 4Hz 72kHz IMPEDANCE Mic input 8 1kΩ Mic input Ribbon mode 20kΩ Hi Z input unbalanced 2 5MΩ Hi Z input balanced 5MΩ Balanced Output 300Ω Unbalanced Output 150Ω PEAK LED METER Green threshold 12dBu Red threshold 16dBu...

Page 9: ...er for Grace Design to provide efficient and timely warranty service it is important that you mail the completed warranty registration card enclosed with all of our products within 10 days of the original date of purchase You may also register your product directly with Grace Design by telephone 303 443 7454 Monday Friday 9 00am to 5 00pm MST or you can register your product online at www gracedes...

Page 10: ...m 501 page 10 Revision Page Change Date Initials A all 9 15 09 edg Manual Revisions ...

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