Adcom GFA-7700 ユーザーズマニュアル

9

Before your new GFA-7700 left our factory, it was carefully inspected for physical imperfections and 

tested for all electrical parameters as a routine part of ADCOM’s systematic quality control. This, along 

with full operational and mechanical testing, should ensure a product flawless in both appearance and 

performance. After you have unpacked the GFA-7700, inspect it for physical damage. Save the shipping 

carton and all packing material as they are intended to reduce the possibility of transportation damage, 

should the amplifier ever need to be shipped again. In the unlikely event damage has occurred, notify your 

dealer immediately and request the name of the carrier so a written claim to cover shipping damages can 

be initiated. THE RIGHT TO A CLAIM AGAINST A PUBLIC CARRIER CAN BE FORFEITED IF THE CARRIER IS NOT 

NOTIFIED PROMPTLY IN WRITING AND IF THE SHIPPING CARTON AND PACKING MATERIALS ARE NOT AVAILABLE 

FOR INSPECTION BY THE CARRIER. SAVE ALL PACKING MATERIALS UNTIL THE CLAIM HAS BEEN SETTLED.

During normal home operation the internal heatsinks of the GFA-7700 may become warm. However, there 

are instances during high-level playback into low impedances when the heatsinks will become much 

warmer than usual. To ensure the amplifier’s long-term, trouble-free operation, it is necessary to provide 

adequate ventilation for the heatsinks. Therefore, the GFA-7700 should be kept away from external 

sources of heat such as radiators and hot-air ducts. The GFA-7700 should never be placed with other 

heat-producing components in a cabinet or enclosure lacking free air flow. The top and bottom panels 

of the amplifier’s chassis have been provided with vents to allow the necessary cooling of the internal 

components. It is imperative that these vents are not obstructed in any way.

We recommend that you do not stack other components on top of the GFA-7700. Not only will heat 

generated by the amplifier affect the performance of equipment stacked on top of the GFA-7700, but 

the free flow of air through the ventilating slots in the amplifier may be partially obstructed. This is 

particularly important if your system includes low-impedance loudspeakers which are difficult to drive, or 

you will consistently demand high volume levels from the amplifier and speaker system. 

If you observe these recommendations, the GFA-7700 will perform reliably in any reasonable environment. 

You should also pay attention to such normal considerations as protection from excessive dust and 

moisture. Occasional vacuuming of accumulated dust on the chassis, panels and around the ventilating 

slots should be all that is required.

The optimal performance of your new GFA-7700 will ultimately depend on the care with which you make 

the connections between the amplifier, preamplifier, surround sound decoder and the loudspeakers. All 

input and output signal connections should be made only with high quality, low-loss, low capacitance 

cables following the recommendations in the Inputs and Outputs section of CONNECTING THE GFA-7700.

For those of you who are in a hurry to hook up your amplifier into your system, we have included this 

quick-connection section. The wiring is straight forward and expeditious if you use the proper cables 

and follow this diagram exactly. If you have any difficulties or questions, please refer to the appropriate 

section of this manual for complete descriptions and instructions.

Whenever connections to or from the GFA-7700 are being made, be certain that the AC On/Off Switch 

(6) of the amplifier is in the OFF position, the AC Power Cord (5) of the amplifier is disconnected from 

the AC wall outlet and that all associated components are turned off.