Your
new
AT705 stereo headphone consists
of
a
lightweight,
comfortable
headphone
and
a separate impedance
matching
adapter
which
connects
to
the
amplifier
output
of
your
stereo
system.
The technical expertise
and
manufacturing
skill
of
Audio-
Technica, makers of the
highly
acclaimed Dual
Magnet
phono
cartridges, were
fully
exploited
to
bring you
this
excellent head-
phone set
featuring
a
wide-range
flat
response and clear,
nat-
ural sound.
As
with
our other headphone models, the
functionally
sen-
sible bi-polar, open- back
construction
was
applied
to
this
head-
phone. This design
not
only
reduces
weight
and
bulk
but
also
improves
transient
response
and
eliminates the "closed- in" feel-
ing
which
is a cause
of
discomfort
when using the
convention
-
ai, closed-back headphone.
The convenient impedance
matching
adapter does
not
re-
quire
a separate power source,
thus
eliminating
the usual cause
of
static
and possible damage
to
the driver units.
Simply
hook
it
up
to
your stereo
amplifier
and
you are ready
for
an expe-
rience in superb music enjoyment.
YOUR
AMPLIFIER
The
adapter
can
be
connected
to
any
ampli-
fier
with
an
output
of
over 3
watts
and
de-
signed
for
use
with
4 to
16-ohm
speakers,
either
transistor
or
tube
type
, or even a
pro-
fessional
BTL
model. Since the AT705 is a
CONNECTIONS
highly
sensitive
instrument
, your
amplifier
should
be
of
a comparable high
quality
with
low
distortion
and noise levels. The
adapter
should
be
connected to the speaker
terminals
of
the
amplifier,
not
the headphone terminals.
The connecting cords
of
the adapter are color-
coded as
follows:
Red
: R+
(right
channel)
Black: R-
(right
ground)
White:
L +
(left
channel)
Blue: L -
(left
ground)
1.
After
switching
off
the power
supply
of
your amplifier, remove the speaker cords
from
the
terminals
and
connect the adapter cords
as
illustrated
below(Fig
. 1). In some
ampli-
fier models the channel
terminals
may
be
marked
"8
ohms" and the
ground
terminals
as
"0"
or "
Common."
In the
case
of
a
tube
model where
the
plus
terminals are separated
into
4-ohm,
8-ohm
and
16-ohm,
test-listen
using each
terminal
and select the best one.
Generally speaking, the
finest
effect is ob-
tained
through
the 16-ohm terminal.
2.
Next, connect
the
speaker cords to
the
ter-
minals on the back
of
the AT705
adapter
as
shown
in Fig.1.
Be
sure
that
there are no
loose
wires
which
can cause
short
circuiting
,
then
tighten
the screws.
3.
If
your
amplifier
has an extra pair of speak-
er
terminals
,
simply
connect the adapter
input
cords
to
them
and leave the speaker connec-
tions
intact.
Operating
the stereophone-
speaker
switch
of
the adapter
will
channel
the signal
to
the respective equipment.
4.
Finally, insert the headphone cord
plug
into
the
jack
of
the adapter. The dent in
the
plug casing should face
upward
. This
com-
petes
the necessary connections.
LEFT CHANNEL SPEAKER RIGHT
CHANNEL
SPEAKER
AMPLIFIER
SPEAKER
TERMINALS
+
Fig.1
