KEF REFERENCE 107 - Model 107: K-UBE; Description of K-UBE and Its Controls; Installing K-UBE; Signal Connections

3.0 MODEL 107: K-UBE
3.1 DESCRIPTION OF K-UBE AND ITS CONTROLS
K-UBE
is
an
active
low-level
equaliser
which,
when
connected
between
the
pre-
and
power
amplifier
or in
the
tape or
processor
loop
of
your pre-amplifier,
provides
two
types
of
: equalisation,
one
fixed,
the
other
variable.
The
fixed
equalisation
affects
the
midrange
and
high-
frequency
sections
of
Model
107.
ltis
set
to
provide
frequency
response
shaping
and
precise
sensitivity
matching
between
the
two
loudspeakers
to
better
than
0.5dB.
This
equalisation
is
a
part
of
the
system
design,
your
K-UBE
being
unique
to
your
pair
of
loudspeakers,
and
should
be
used
with
that
pair
only.
The
variable
equalisation
consists
of
three
controls
allowing
you
to
optimise
low-frequency
performance
to
suit
both listening
environment
and
programme
material.
These
three
controls
are
marked
Contour
(controlling
LF/MF
balance),
Extension
(setting
the
speakers’
bass cut-off
frequency),
and
Q-factor
(to adjust
damping).
NB: Because K-UBE contains part of your loudspeakers’ crossover network, it should
always
be
in
circuit
when
the
loudspeakers
are
operating.
Switching
the
Tape
Monitor
loop
in
and
out
to
try
to
make
A/B
comparison
of
the
effects
of
bass
equalisation
will
not
cause
any damage, but will result in incorrect mid and high- frequency balance.
3.2 INSTALLING K-UBE
; SIGNAL CONNECTIONS
The preferred method of connection will depend upon vour particular amplifier
combination. Please refer to the appropriate section below for connection instructions.
1. Separate Pre-and Power Amplifiers
Connect
the
K-UBE
flying
leads
marked
Signal
In
to
the
pre-amplifier
output
phono
sockets,
and the leads
marked
Signal
Out
to
the
power
amplifier
input
phono
sockets,
observing
correct left
and
right
channel orientation.
2. Integrated Amplifiers and Receivers
if your amplifier/receiver is equipped with an external processor loop facility, then connect
the
K-UBE
flying
leads
marked
Signal
In
to
the
processor
loop
output
phono
sockets,
and
the
leads marked Signal Out to the processor loop input phono sockets.
If no external processor loop facility is provided, K-UBE should be connected in the tape
monitor loop. Connect the K-UBE flying leads marked Signal In to the amplifier tape-loop
phono sockets marked TAPE OUT/RECORD OUT/LINE OUT, and then connect the flying
leads
marked
Signal
Out
to
the
amplifier
tape-loop
phono
sockets
marked
TAPE
IN/TAPE
REPLAY/LINE IN. If you have only one tape monitor loop, into which a tape deck is
already connected, disconnect the tape deck from your amplifier and re-connect to the tape
sockets provided on the rear of K-UBE.
NOTE: Some integrated amplifiers/receivers are fitted with a removable link between pre-
amplifier and power amplifier sections, to allow external equipment to be inserted between
pre- and power amplifier. If your amplifier/receiver is so equipped, K-UBE should be
connected there, observing the connection instructions in Section 1 above.