Product Manuals
m101
Owner's manual Rev A
m103 Owner's manual Rev A
m501 Owner's manual Rev A
m801
Owner's manual Rev B
m201 Owner's manual Rev E (with A/D module option)

 

NOTE- Earlier versions of the model 801 and model 201 manuals depicted the positions of the XLR pins incorrectly in some of the cable termination diagrams. While the pin numbers are correct, these diagrams can be confusing. Please download the current version of the appropriate manual for your preamplifier.
m802 Owners manual Rev F
Lunatec V3

Owner's manual Rev E
Digital output polarity issue information (unit serial# V3001-V3496)
Digital output polarity RMA form
Voltage calibration procedure
DC input pin adjustment proceedure
Lunatec V3 firmware update form

m904 / m904b Owners Manual Rev H
m906 Owners Manual Rev G
m902 Owners Manual Rev G
spacebar stereo Owner's manual Rev B
spacebar modular Owner's manual Rev B
Discontinued Products
model 101 Owner's manual Rev C
model 201 Owners manual Rev C
model 901 Owner's Manual Rev A
model 801 Owner's manual Rev C
Lunatec V2 Owner's manual 172k
Voltage calibration procedure
Voltage calibration procedurehtml
AC adaptor operation issues
model 801R Owner's manual Rev A  (For Software version 1.3)
Owner's manual Rev B (For software version 1.4)
Software upgrade instructions
Software upgrade instructions
RCU serial cable diagram 
Firmware updates
m904 m904 firmware update (main unit Rev 1.04 / remote unit Rev 1.05)
m906 m906 firmware update (main unit Rev 1.08 / remote unit Rev 1.07)
  These dowloads are .zip files which contain the firmware, the firmware upgrader programs and all the necessary documentation to properly ugrade the firmware in your unit. Both the m904 and m906 require two seperate firmware upgrades: one for the control firmware (RCU or m904 frontpanel controls) and one for the mainframe processor firmware.

Note: please contact your local dealer or us directly (1-303-443-7454) to request the necessary WA059 PC interface upgrade cable. There is no charge to for this item, but you must have it to upgrade your unit.
m802 m802 firmware update (preamp Rev 2.2 / remote unit Rev 2.0)
This dowload is a .zip file which contain the firmware, the firmware upgrader programs and all the necessary documentation to properly ugrade the firmware in your m802 unit.
EC Declaration of conformity
model 801
General Documents
Grace Design Design Philosophy
Grace Design m802 A/D technology
Grace Design print catalog

Please let us know if you need a document which is not listed here. email service