QUAD 77 - Advanced Operations and Care; Loudspeaker Phasing Check; Headphone Usage and Input Sensitivity; Output Ports and Maintenance

LOUDSPEAKER
PHASING
HEADPHONES
CHANGING
INPUT
SENSITIVITIES
PREAMPLIFIER
OUT
CHARGING
OUTPUT
MAINTENANCE
lf there
is
any
doubt
about
the
way
the
loudspeakers
are
connected
thei
r
phasing
can
easily
be
checked
by
playing
a mono
source
when
the
sound
should
appeal
to
emanate
from
a
point
midway
between
the
two loudspeakers.
lf this
is
indefinite
then
the
connections
to
one
of the
loudspeakers
should
be reversed.
when
correctly
connected
the loudspeakers
will
give
a definite
centre
sound
source
with
more
full
bodied
tenor
and
bass
registers.
Headphones
will
normally
be used
in
place
of loudspeakers
and there
are a
number
of
suitable
switch
units
available
designed
to enable
the
loudspeakers
to
be
switched
off
when
the headphones
are
plugged
in.
Most
of these
incorporate
a simple
attenuator
circuit
to
permit
operation
at normal
volume
control
settings.
Electrostatic
orothertypes
of headphones
requiring
a high
level
input
should
be
operated
in
accordance
with
the
manufacturers
instructions.
The
input
sensitivities
for
source
1
,
source
2
and
tape
are set
at
the factory
for
300
mv
which
should match
most
current
equipment.
These
sensitivities
can
be
changed
separately,
using
the
77 remote
control,
to
100
mV
or 77s
my it
preferred.
To
change
the
setting
carry
out
the following
steps for
each input
separately.
select
the
input you
want
to
change
by
pressing
the
button(on
the
77
remote)
next
to
the
required
source
-
the
dispray
wirfchange
to
,i.,o*
the
functions
available
for
the
source
serected.
press
ihe
sens
Eutton
-
the
dispray
wirl
show
the
sensitivities
availabte
e00;
300;
77e
the
progr"rrlJ
revet
wiil
be
indicated
by
an
'A'
next
to
it
(eg
300
A)
io
chang"
ir.,""r"iting
j;sr
press
the
button
next
to
the
rever
requiied
and
the
,A'
wiil
move
next
to
the
new
chosen
setting.
Now
press
up
to
return
to
the
source
menu.
The
preamplifieroutput
ottheTT
integrated
amplifier
is 775
mV
which
is
suitable
for
feeding
most
power
amplifiers.
phono
sockets
are
fitted
and
an
appropriate
cable
should
be
used
to
make
connection
to
the
power
amplifier
signal
input.
An
output
for
charging
the
batteries
in the
77
remote
control
unit.
Not to
be
used
for
any
other
purpose
or
for
feeding
other
types
of equipment.
The
case
can
be cleaned
with
a soft
brush
or, for
more
stubborn
marks,
a
slightly
moistened
lint{ree
cloth.
In
this
case
remove
the
mains
plug
from
the
supply
socket.
Do
not
use
cleaning
agents,
solvents
or
abrasives.
l.
I.
page
9