03431
STEREO OUTPUT CONNECTIONS
MOdel
8000
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. Channel
IIA"
leads go
to
the
binding posts marked Channel "A"; Channel "B",
to
those
marked
Channel "B".
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
The Model 8000 has DC load (speaker)
protection
built into
the
heat
sink module,
however,
all
speakers
can
be
damaged
by
having too much power appJied
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
protecti~
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. See page 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 very
clean
bass response.
Excessively long, or small
diameter
speaker
wires
can
lower
the
damping
factor
and
distort
low frequencies. A damping
factor
of
at
least
50
should
be
maintained
to
insure good audio quali
ty.
The
relationship
between wire Jength and
diameter,
and damping
factor
can
be
calculated
using
the
chart
(MFRM-03510) on
the
foHowing 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/
l,
with
the
manufacturer's
impedance of
the
speaker
system.
The damping
factor
can
now
be
read.
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