03501-1
STEREO
OUTPUT
CONNECTIONS
Two sets of
five-way binding posts,
on the rear panel, serve as output connectors,
with
one black and one red binding
post
for
each channel. Left channel leads go to
the binding posts
marked
LEFT;
right channel, to those marked RIGHT.
Output leads are best connected,
to the amplifier, with
standard banana plugs;
however, the five-way action of
the binding
posts
permits the use
of tinned wires
or spade
lugs.
Make certain that the speakers are
properly phased. Connect the black or minus (-)
terminal on the speaker cabinet
to the appropriate black binding post
on
the
amplifier. Connect the red or plus
(+)
terminal
to
the red binding post. Check to
see
that the stereo-mono switch on the
rear
of the amplifier is
in the stereo
position.
SPEAKER PROTECTION
All
speakers can be
damaged by having too much power applied to
them.
Fuse
protection
is
an effective and inexpensive
way
of
preventing this from occurring.
If your
speaker system
does
not contain a fuse or
a
circuit breaker, a
fuse should be
placed in series with each speaker
and the wire going to the red terminal
on the
rear of the amplifier.
Maximum protection can be
obtained
with
fast-acting
fuses. Use the value
recommended by the
manufacturer. If
no value is
specified, use
the
chart provided
to select
the
correct value
(MFRM-03530).
To
use
the
chart, take
a straightedge,
such
as a
ruler,
and
line up
the speaker's
impedance
with
its
peak
music
power rating. The
proper fuse value can then
be
read
from the center column.
Choose a fuse that is closest
to,
and
below,
the
value indicated.
WIRE SIZE AND
DAMPING FACTOR
The
high damping factor of BGW
amplifiers results in a
very clean bass response.
Excessively long,
and small
diameter speaker wires
can lower the damping
factor
and distort the lower
frequencies.
A
damping
factor
of at
least
50
should be
maintained
to
insure
good audio
quality.
The
relationship
between wire
length
and diameter,
and damping
factor can be
calculated
using
the chart (MFRM-03510)
on the following
page.
Proceed as
follows:
1. Using a
straight-edge,
line up
the
gauge of the
speaker wire
with its
length.
Mark off the
resulting
source
resistance where
this line
crosses
the center
column.
2.
Line up
the source
resistance,
determined in
step
#1,
with
the
manufacturer's
impedance*
of
the speaker
system.
The
damping
factor can
now be read.
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