It is suggested that the three front channels follow this chart for speaker lengths and wire gauges.
up to 24 feet | AWG16 |
up to 36 feet | AWG14 |
up to 58 feet | AWG12 |
Generally, for the two rear surround channels, longer runs of cable are needed, but since less program material is being transmitted through the cable, longer runs are acceptable:
up to 48 feet | AWG16 |
up to 72 feet | AWG14 |
up to 116 feet | AWG12 |
If longer runs are needed, it is best to consult with your Adcom Dealer to maximize the performance of your system with your exact conditions.
All loudspeakers having a nominal impedance down to 4 ohms can be connected to and driven by the GFA-7700. The amplifier can drive these low-impedance speakers at more than adequate power levels with no difficulty. It should be noted here that many loudspeaker systems which are nominally rated at 4 ohms drop in impedance, in some parts of their frequency range, to as low as 2 ohms (and sometimes less). You will not experience difficulties even with these very low impedance loads unless you demand excessively high volumes levels from your system.
It is not recommended that you run additional sets of speakers on any or all of the amplifiers in the GFA-7700 in order to insure the integrity of the system. If you choose to add remote speakers in another room, it is strongly suggested that a switching system to disconnect the non-home-theater speakers be incorporated when the surround sound, home-theater mode is in operation. A device such as the Adcom GFS-3 or GFS-6 Speaker Selector is strongly recommended. A Speaker Selector enables you to maintain integrity while giving you the flexibility to add speakers throughout your house.
CARING FOR YOUR GFA-7700
Great care has been taken by ADCOM to ensure that your amplifier is as flawless in appearance as it is electronically. The front panel is a heavy-gauge, high-grade aluminum extrusion carefully finished and anodized for durability. The chassis, top cover and rear panel are heavy-gauge steel that has been powder coated and baked to ensure a lasting finish. If the front panel, top or sides become dusty or fingerprinted, they can be cleaned with a soft lint-free cloth, slightly dampened with a very mild detergent solution or glass cleaner.
DO NOT SPRAY OR POUR LIQUIDS OF ANY KIND ON THE GFA-7700.
