KEF REFERENCE 107 - Page 6

if
the
speakers
are
placed
too
close
together,
the
stereo
image
will
not
be
fully
developed.
For
normal
listening,
placement
will
usually
be
between
2m
and
4m
apart
depending
upon
the
listening
distance
and
the
room
size.
The
listeners’
distance
from
the
speakers
should
be
equal
to,
or
greater
than,
the
distance
between
the
loudspeakers.
Tests
should
be
made
with
both
music
and
speech
before
deciding
upon
the
final
location
for
the
speakers.
NB:
To
avoid
damage
to
the
mid/high-frequency
enclosure
mounting,
it
is
recommended
that
cabinet
location
is
achieved
by
lifting
from
the
bottom
front,
with
one
hand
at
the
upper
rear.
2.3
SPEAKER
CONNECTIONS
The
terminals
fitted
to
the
Model
107
will
accept
either
bare
wire,
4mm
'banana'
plugs,
or
6mm
spade
connectors.
If
you
use
bare
wire
you
will
need
to
strip
12.5mm
(1/2")
of
insulation
-
twist
it
tightly
together
with
clean
fingers,
and
having
previously
unscrewed
the
terminal,
push
the
wire
through
the
hole
in
the
terminal
and
screw
it
up
TIGHT.
Make
sure
there
are
no
stray
strands
of
wire
which
can
cause
a
short
circuit
between
the
two
terminals.
If
4mm
'banana'
plugs
are
used,
choose
a
good
quality
sprung
or
expanding
type,
making
sure
the
cable
is
properly
connected
and
that
the
plugs
fit
tightly
into
the
sockets.
Normal
polarity
of
connections
(amp
positive/red
to
speaker
positive/red
and
amp
black
to
speaker
black)
should
be
observed.
NB:
All
connections
should
be
made
with
the
equipment
switched
OFF.
Only
switch
ON
once
all
connections
have
been
made
and
are
secure.
Correct
polarity
is
vital
to
the
proper
operation
of
the
system.
Once
the
system
is
fully
installed,
with
K-UBE
lead
connected,
you
can
check
the
polarity
in
the
following
manner.
Place
the
two
loudspeakers
close
together
facing
each
other
about
5-7.5cm
(2"-3")
apart.
Play
a
recording
which
has
plenty
of
deep
bass
such
as
an
organ
solo,
operating
both
speakers
simultaneously
with
the
amplifier
switched
to
‘mono’.
Repeat
the
test
after
changing
over
the
connections
on
one
loudspeaker.
Correct
polarity
is
indicated
by
firm,
full
bass.
When
polarity
is
incorrect,
the
bass
will
be
noticeably
weaker.
Keep
the
speakers
facing
each
other
and,
after
establishing
correct
polarity
as
above,
again
reverse
the
connections
on
one
loudspeaker.
Using
the
same
piece
of
music,
and
keeping
the
signal
in
mono,
rotate
the
balance
control
on
your
amplifier
on
either
side
of
'centre'.
You
will
hear
a
point
at
which
the
signal
almost
disappears.
At
this
point
the
output
from
both
loudspeakers
is
the
same.
In
an
ideal
symmetrical
listening
set-up
this
should
be
the
setting
adopted
(do
not
forget
to
correct
the
polarity
change
you
have
just
made).
You
may
need
to
use
the
balance
control
to
compensate
for
an
"off
centre"
listening
position,
or
asymmetrical
speaker
positions
within
the
room.
Model
107’s
imaging
capabilities
are
outstanding
and
it
is
worthwhile
spending
some
time
in
achieving
the
correct
balance
between
the
two
speakers
from
your
normal
listening
position.
Always
try
to
keep
the
cable
run
from
amplifier
to
speakers
as
short
as
possible
to
minimise
power
and
high
frequency
losses.
The
choice
of
cable
to
use
with
Model
107
is
less
critical
than
with
most
other
loudspeakers
owing
to
the
resistive
nature
of
the
load
it
presents
to
the
amplifier.
The
total
resistance,
however,
should
not
exceed
0.2
ohms.
The
table
(A)
shows
the
maximum
length
that
can
be
used
in
various
gauges
without
audible
effect
on
speaker
performance.
As
a
general
guide
good
audiophile
speaker
cable
has
a
cross
section
of
approximately
4
square
mm.
Colour
coded
cable
is
recommended
to
assist
checking
polarity.
‘
Always
use
cables
of
equal
length
to
both
speakers
even
if
the
actual
length
of
the
cable
run
in
the
room
is
different.
If
one
run
is
shorter
than
the
other
the
excess
cable
should
be
folded
neatly,
concertina
fashion,
and
secured
with
a
cable
tie
or
elastic
band.
The
importance
of
good,
clean,
tight
connections
to
your
loudspeakers
cannot
be
over
emphasised.