Bose 901 Series IV Owner's guide - Page 9

Equalizer, Erv.,2a, Control, Amplifier

Page 9 highlights

THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. h. Place the TAPE switch of the equalizer in the MONITOR position. As you slide the LOW and HIGH FREQUENCY SOURCE AND ROOM COMPENSATION controls from one extreme to the other, you will find a detent in the middle of the control's travel. Place both the LOW and HIGH FREQUENCY SOURCE AND ROOM COMPENSATION controls at this position. Set the LOW FILTER control in the "out" position. i. Place the TAPE MONITOR or TAPE FUNCTION switch of your control amplifier in the NORMAL or OUT position. j. Turn your system on. (Be certain that the equalizer is plugged into the switched ac outlet of your control am- plifier and observe that the pilot light on the equalizer is on.) SKVI1g," 'erv.,2A r EQUALIZER AMPLIFIER CONNECTIONS - I TAPE RECORDER CONNECTIONS L A t A L R - L1 OO Ant L- OOi MON REG R L A L TAPE CONTROL AMPLIFIER Figvia 4 k. Play the entire system as you normally would, using a record player or AM/FM source to be sure it is operating properly. (Do not use a tape recorder for this portion of the test.) I. Turn the BALANCE control of the control amplifier to the extreme left and right to check for proper connection of the left and right channels. (If the channels are reversed, check your amplifier or speaker connections carefully.) You have now tested the amplifier, wiring, and speaker systems, but not the equalizer, as it is not yet switched into the system. If your system is not functioning at this point, please go back and check all connections, as any errors in connection of your system must be corrected before proceeding further. m. With the system now playing, turn the TAPE MONITOR or TAPE FUNCTION switch on your control amplifier to the MONITOR or ON position. The sound should stop. If the sound does not stop, recheck Steps "a" through "l." n. Now, place the equalizer TAPE switch in the NORMAL position. The sound should now return. If the sound does not return and the equalizer pilot light is on, then the equalizer is probably connected incorrectly. Recheck Steps "a" through "I." NOTE 1: THE TAPE MONITOR OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. CHECK THE TAPE MONITOR SWITCH PERIODICALLY TO MAKE CERTAIN IT IS IN THE "ON" POSITION. NOTE 2: THE 901 SERIES IV AND III EQUALIZERS ARE NOT COMPATIBLE WITH THE 901 SERIES I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9

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THE
FOLLOWING
STEPS
ARE
PROVIDED
TO
ENSURE
THAT
THE
EQUALIZER
IS
PROPERLY
CONNECTED
TO
YOUR
HIGH-FIDELITY
SYSTEM.
h.
Place
the
TAPE
switch
of
the
equalizer
in
the
MONITOR
position.
As
you
slide
the
LOW
and
HIGH
FREQUENCY
SOURCE
AND
ROOM
COMPENSATION
controls
from
one
ex-
treme
to
the
other,
you
will
find
a
detent
in
the
middle
of
the
control's
travel.
Place
both
the
LOW
and
HIGH
FREQUENCY
SOURCE
AND
ROOM
COMPENSATION
controls
at
this
position.
Set
the
LOW
FILTER
control
in
the
"out"
position.
i.
Place
the
TAPE
MONITOR
or
TAPE
FUNCTION
switch
of
your
control
amplifier
in
the
NORMAL
or
OUT
position.
j.
Turn
your
system
on.
(Be
certain
that
the
equalizer
is
plugged
into
the
switched
ac
outlet
of
your
control
am-
plifier
and
observe
that
the
pilot
light
on
the
equalizer
is
on.)
SKVI1g,"
EQUALIZER
AMPLIFIER
TAPE
RECORDER
CONNECTIONS
-
I
r
CONNECTIONS
L
A
t
A
L
R
-
L1
OO
OOi
L-
Ant
'erv.,2A
MON
REG
R
L
A
L
TAPE
CONTROL
AMPLIFIER
Fig
via
4
k.
Play
the
entire
system
as
you
normally
would,
using
a
record
player
or
AM/FM
source
to
be
sure
it
is
operating
properly.
(Do
not
use
a
tape
recorder
for
this
portion
of
the
test.)
I.
Turn
the
BALANCE
control
of
the
control
amplifier
to
the
extreme
left
and
right
to
check
for
proper
connection
of
the
left
and
right
channels.
(If
the
channels
are
reversed,
check
your
amplifier
or
speaker
connections
carefully.)
You
have
now
tested
the
amplifier,
wiring,
and
speaker
systems,
but
not
the
equalizer,
as
it
is
not
yet
switched
into
the
system.
If
your
system
is
not
functioning
at
this
point,
please
go
back
and
check
all
connections,
as
any
errors
in
connec-
tion
of
your
system
must
be
corrected
before
proceeding
further.
m.
With
the
system
now
playing,
turn
the
TAPE
MONITOR
or
TAPE
FUNCTION
switch
on
your
control
amplifier
to
the
MONITOR
or
ON
position.
The
sound
should
stop.
If
the
sound
does
not
stop,
recheck
Steps
"a"
through
"l."
n.
Now,
place
the
equalizer
TAPE
switch
in
the
NORMAL
position.
The
sound
should
now
return.
If
the
sound
does
not
return
and
the
equalizer
pilot
light
is
on,
then
the
equalizer
is
probably
connected
incorrectly.
Recheck
Steps
"a"
through
"I."
NOTE
1:
THE
TAPE
MONITOR
OF
YOUR
CONTROL
AMPLIFIER
MUST
BE
LEFT
"ON"
FOR
THE
ACTIVE
EQUALIZER
TO
BE
IN
THE
CIRCUIT.
CHECK
THE
TAPE
MONITOR
SWITCH
PERIODICALLY
TO
MAKE
CERTAIN
IT
IS
IN
THE
"ON"
POSITION.
NOTE
2:
THE
901
SERIES
IV
AND
III
EQUALIZERS
ARE
NOT
COMPATIBLE
WITH
THE
901
SERIES
I
AND
II
SPEAKER
SYSTEMS.
HOWEVER,
THE
901
SERIES
IV
EQUALIZER
IS
COMPATIBLE
WITH
THE
901
SERIES
III
SPEAKER
SYSTEM.
9