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English
CONTROLS AND CONNECTIONS
Low-Voltage (DC) Power Connection
Your speakers use external low-voltage power supplies to energize
their electrostatic panels. For this reason the proper low-voltage power
supplies are provided. A power supply should be firmly inserted into
the ‘DC Power In’ receptacle on the rear connection panel of each
speaker, then to any convenient AC wall outlet. Your speakers inte-
grate a signal sensing circuit which will switch off after a few minutes
of no music signal, and requires less than two seconds to recharge the
panels when a music signal is present.
Your speakers are provided with a power supply for the power ser-
vice supplied in the country of original consumer sale. The AC power
requirements applicable to a particular unit is specified both on the
packing carton and on the DC power supply. If you remove your
speakers from the country of original sale, be certain that the AC
power supplied in any subsequent location is suitable before connect-
ing the low-voltage power supply. Substantially impaired performance
or severe damage may occur to a speaker if operation is attempted
from an incorrect AC power source.
WARNING! The DC power supply should not be
installed, removed, or left detached from the speaker
while connected to an AC power source.
Signal Input Connection
Use the best speaker cables you can. The length and type of speaker
cable used in your system will have an audible effect. Under no cir-
cumstance should a wire of gauge higher (thinner) than #16 be used.
In general, the longer the length used, the greater the necessity of
a lower gauge, and the lower the gauge, the better the sound, with
diminishing returns setting in around #8 to #12.
A variety of cables are available whose
manufacturers claim better
performance than standard heavy gauge wire. We have verified this
in many cases, and the improvements available are often more notice-
able than the differences between wires of different gauge. The effects
of cables may be masked if equipment is not of the highest quality.
Connections are done at the signal input section on the rear electronics
panel of the speaker. Use spade connectors for optimum contact and
ease of installation. Hand tighten the binding posts, but do not overtight-
en—do not use a tool to tighten the binding posts. Be consistent when
connecting the speaker cables to the signal input terminals. Take care to
assign the same color cable lead to the (+) terminal on both the left and
right channel speakers. If bass is nonexistent and you cannot discern a
tight, coherent image, you may need to reverse the (+) and (–) leads on
one speaker to bring the system into proper polarity.
WARNING! Turn your amplifier off before making or
breaking any signal connections!
On-Wall/Off-Wall Position Switch
Focus ESL C18 features a unique ‘on-wall/off-wall’ switch that tailors
acoustic equalization to either installation option. Simply set this switch
to On-Wall if mounting to a surface. Set the switch to Off-Wall if the
Focus ESL C18 is more than four inches from a wall. Setting this switch
ensures that you will achieve total system matching in even the most
diverse setups (such as systems mixing on-wall and off-wall installations).
Break-In
When you first begin to play your speakers, they will sound a bit bass shy. This is
due to the high quality, long-life components used in our woofer. Our custom
made woofer requires approximately 72 hours of break-in at 90 dB (moderate
listening levels) before any critical listening. The break-in requirements of the
crossover components (and, to a lesser degree, the stator) are equivalent.
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