Care in installation can often avoid EMI induced problems. The following
practices should generally be observed in any application, and will be
especially important where EMI may be a problem.
Interconnect cables should be kept as short as possible (3 meters or
less), and shielded cable should be used (cable which has two center
conductors, and a separate external shield connected at only one end).
Physical location and cable "dress" can be an important factor in
minimizing hum pickup. The installation should situate the preamplifier
well away from the power amplifier, and power (ac mains) cords should
be dressed to remain at least 4" (100mm) away from input/output
cables.
CONNECTION
INPUT: Connect the preamplifier to your MV60 amplifier at the RCA type
connectors located on the back of the amplifier.
OUTPUT: Five way binding posts are provided for connection of your
loudspeakers, with correct spacing to accept a standard "double ba-
nana" plug. They will also accept spade lugs, bare wire, or pin connec-
tors. The two channels should be connected in correct "relative phase".
This means that when the same signal is applied to both channels, the
right and left channels speaker diaphragms will move synchronously -
in and out together.
Terminals on speakers are usually coded - one designated "C",
"ground", "-" or black, the other designated "+" or red. "In phase"
connection of the speakers can normally be achieved by taking care to
connect the wire from the "+" amplifier terminal to the red or "+" coded
terminal on each speaker, and connecting the "-" terminal to the black
or "-" coded terminal on each speaker.
In phase connection of the speakers can be readily ascertained by ear.
Listen to a recording of a solo vocalist (use a mono recording if avail-
able). With the speakers in phase the voice should be clearly focused
between the two speakers. With the speakers connected out of phase,
the voice will be diffused, with no identifiable source. Relative phase
may be reversed by switching the "+" and "-" leads at one speaker only.
MV60 Owner’s Manual 6
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