Grace m801mk2 Owner'S Manual Download Page 1 | Manualshive

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Owner’s Manual Rev A

All contents © Grace Design/ Lunatec LLC

303.823.8100 • www.gracedesign.com

8 Channel Microphone Preamplfier

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Summary of Contents for m801mk2

Page 1: ...Owner s Manual Rev A All contents Grace Design Lunatec LLC 303 823 8100 www gracedesign com 8 Channel Microphone Preamplfier ...

Page 2: ...pabilities of the m801mk2 Also please do not hesitate to contact us directly if you have any questions comments or concerns with your new m801mk2 microphone preamplifier Thanks for reading and happy recording The Grace Design Team Contents Welcome 2 Important Safety Information 3 GENERAL 3 SAFETY MARKING SYMBOLS 3 SERVICE INFORMATION 3 Front Panel Controls 4 Rearpanel Connections 5 Installation 6 ...

Page 3: ...uitable for continuous operation Weight 12 0lbs 5 44kg 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 haza...

Page 4: ... the filter capacitors discharge As well even if the phantom power is switched off the LED will illuminate if voltage is being fed from an external source i e when using a direct split in a remote recording application D PHASE REVERSAL SWITCH The phase reverse switch reverses the absolute polarity of the music signal at the input of the preamplifier The switch illuminates green and provides power ...

Page 5: ...reamplifier Fuses are two T800mA 250V 5mm x 20mm Time Delay Fuses B XLR MIC INPUT CONNECTOR Input connections are made via female XLR con nectors with pin 2 positive pin 3 negative and pin 1 ground 48V phantom power is supplied on pins 2 and 3 C XLR OUTPUT CONNECTOR Output connections are made via male XLR con nectors with pin 2 positive pin 3 negative and pin 1 ground D PARALLEL XLR OUTPUT CONNEC...

Page 6: ...quire any extra ventilation 4 Rack screws are included in the box AUDIO CONNECTIONS Microphone input connections are made via female XLR connectors with pin 2 positive pin 3 nega tive and pin 1 ground 48V phantom power is supplied on pins 2 and 3 Output connections are made via male XLR connectors with pin 2 positive pin 3 negative and pin 1 ground If the output is to be used unbalanced pin 1 shou...

Page 7: ...ophones by boosting the gain by 10dB while disabling 48V phantom power and increasing the input impedance Before activating ribbon mic mode make sure the channel s gain is fully down counter clockwise and 48V phantom power is off Now simply press the ribbon switch and turn the gain control upwards until the proper recording level is achieved If you press the 48V phantom switch while the ribbon swi...

Page 8: ...he generator preamplifier then the level meter 8 Adjust the generator output level so that the preamplifier output level is at 16dBu 4 88VRMS or another desired red threshold level If the proper level can t be reached adjust the preamplifier gain control 9 Locate VR2 see figure 3 p 9 on the channel 1 audio circuit board and adjust until the peak LED is between green and red Repeat this procedure f...

Page 9: ...te DC offset potentiometer VR1 and rotate it for a reading that matches the minimum gain reading 0 005V 8 The objective is to get the minimum gain offset and the maximum gain offset to match as closely as possible 9 The input offset does drift with temperature and having the lid off will allow the circuitry to cool It is advisable to replace the lid and let the preamplifier warm up again about 20 ...

Page 10: ...eighting 130dB 40dB gain 150Ω source 22 22kHz 125dB 40dB gain 150Ω source A weighting 128dB 20dB gain 50Ω source 22 22kHz 117dB 20dB gain 50Ω source A weighting 120dB 20dB gain 150Ω source 22 22kHz 117dB 20dB gain 150Ω source A weighting 119dB GAIN RANGE Default Mode 18 64dB 2dB steps Ribbon Mode 28 74dB 2dB steps PHASE DEVIATION 40dB gain 40Ω source 75Hz 45kHz 3 CROSSTALK Any Channel 40dB gain 1k...

Page 11: ...ve workmanship without charge provided the customer has appropriate proof of purchase and that the product has its original factory serial number Customers within the US are responsible for all inbound freight charges to Grace Design s facility while Grace Design will pay for return freight charges via ground service Customers outside the US must contact their distributor for warranty product retu...

Page 12: ...grace design m801mk2 owner s manual 12 Manual Revisions Revision Page Change Date Initials A all initial release 11 08 18 edg ...

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