I UNPACKING PROCEDURES
INSPECTION
This unit was carefully checked and packed before leaving the factory. However, it is always a good
idea to inspect the shipping container and unit for indication of improper handling. If the unit has
been damaged, make an immediate claim to the dealer or distributor from whom it was purchased. If
the unit was shipped to you, notify the transportation company without delay, saving all packing ma-
terials, in order to process the claim.
INITIAL PERFORMANCE CHECK
Continue the inspection by running a performance check. Connect a test speaker to the 8 ohm direct
output terminals see page 6) and a tuner, tape deck, or CD player to the auxiliary input and set the
controls for operation. CAUTION: TO PROTECT THE SPEAKER FROM DAMAGE, DO NOT TURN
THE UNIT ON UNTIL ALL CONNECTIONS HAVE BEEN MADE. IN ADDITION, MAKE SURE THE
UNIT IS GROUNDED BEFORE TESTING. If the unit should be inoperable and no damage is noted,
please notify the factory at 1-847-678-3222 and ask for Technical Support.
II INSTALLATION INFORMATION
RACK MOUNTING
For best results use a 10-32 class UNF-2B or 12-24 class UNC-2B rack and 0.625 inch machine
screws metric: M5X8-6H or M6X1-6H, 15.88mm). It is recommended that the drive of these screws
be phillips in order to protect the finish from unnecessary scratches. Also recommended are nylon or
plastic washers which will not only help protect the finish but also aid in retaining the screws.
CONVECTION, FAN COOLING, AND VENTILATION
This unit is cooled via convection and therefore designed for continuous operation. Do not block the
unit’s heatsink fins or vent holes located in the cover. If the unit will be rack mounted, you must util-
ize a cooling fan that is capable of exhausting not less than 300CFM. The fan must be mounted to
the inside top of the rack, above the amplifier.
TECHNICAL SUPPORT
A troubleshooting chart is located at the end of this manual for your convenience. If you are in need
of further assistance, you can reach our design engineers at 1-847-599-1799. Grommes~Precision
is based in Gurnee, Illinois and is on Central Standard Time. Our hours of operation are Monday -
Friday from 8:00am to 4:00pm. Troubleshooting information can also be found at our website www.
grommesprecision.com.
AXIOM 250 INSTRUCTIONS
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Thank you for purchasing from Grommes~Precision!
Grommes~Precision and its commercial audio division, Precision Electronics, has been designing,
engineering, and manufacturing quality sound equipment in the United tates since it started opera-
tion in March of 1946. Over a half a century of quality, service, and flexibility as “Your Personal
Manufacturer” have made us one of the last American audio manufacturers. If you have any ques-
tions with this or any one of our other fine products, give us a call. When you talk with a member of
the Grommes~Precision team you’ll be speaking with someone who had a hand in concept, design,
production, or testing of this very product.
Grommes~Precision
Precision Electronics
847-599-1799 · 800- INCE-46 · FAX: 847-599-6178
1331 Estes Ave. · Gurnee, IL 60031 · U A
www.grommesprecision.com
Grommes~Precision is an American manufacturer of original, custom, and private labeled audio/electronic equipment for use in commercial, consumer, and industrial applications since 1946.
