Adcom GFA-585se User Manual page 7

RIGHT/LEFT INPUT (Balanced)
The audio inputs to the GFA-585se are through two high-quality, Balanced XLR jacks to
minimize high-frequency losses, noise, etc. They will accept standard XLR-type plugs, one
for each channel, LEFT and RIGHT. To insure that the performance designed into the GFA-
585se is preserved, you should use the highest quality plugs and cable as are feasible. There
are many cables specifically designed for this application. Your ADCOM dealer can help
select the best cable for your needs.
RIGHT/LEFT INPUT (Unbalanced)
The audio inputs to the GFA-585se are through two high-quality, gold-plated brass RCA jacks
using high quality insulation to minimize high-frequency losses, noise, etc. They will accept
standard RCA-type plugs, one for each channel, LEFT and RIGHT, usually supplied at the
ends of interconnecting cables. To insure that the performance designed into the GFA-585se
is preserved, you should use the highest quality plugs and cable as are feasible. There are
many cables which are designed specifically for these applications and your ADCOM dealer
can be of help in selecting the best cable for your application. Whatever cable you finally
select, it should have low capacitance. This is particularly important if you use a long run
between the preamplifier and the amplifier or if your preamplifier has a high output impedance.
Generally speaking, a cable with a capacitance of around 100pF will work well.
The load impedance which the GFA-585se inputs present to the source preamplifier is 22,000
ohms. This load impedance results in minimal amplifier noise and is more than adequate for
use with any associated source component regardless of its output impedance.
To preserve the correct stereophonic effects, please be certain to connect the left output of
the preamplifier to the RCA jack on the GFA-585se labeled LEFT INPUT and the right output
of the preamplifier section to the RCA jack labeled RIGHT INPUT.
RIGHT/LEFT STEREEO SPEAKER OUTPUTS
The GFA-585se's connections to the loudspeakers are made through acrylic cover with 24K
gold plate heavy speaker terminals located on the rear panel. These terminals will
accommodate either bare wire, tinned wire, terminal pins, spade lugs. The output terminals
are color-coded RED and BLACK to indicate polarity. To insure correct stereo phasing, you
must connect the RED output terminal (labeled "+") to the loudspeaker input terminal color-
coded RED (or labeled POSITIVE, "+", POS,8OHMS or 4 OHMS). The BLACK binding post
terminal on the amplifier (labeled "-") should be connected to the BLACK loudspeaker
terminal (or labeled NEG, "-", C, COM, COMMON, G, or GROUND).
5