Bose 901 Series II Owner's guide - Page 9

Control, Amplifiers, Having, Monitor, Circuits

Page 9 highlights

4. ALTERNATE METHOD Ill (Using FOUR-CHANNEL DECODERS) As previously stated, the BOSE Active Equalizer should be connected before the final stage of amplifica• tion of the amplifier channels powering the 901 speakers. Additionally, the Equalizer should be connected at a point in the signal path following the four'channel decoder to prevent any possible overloading of the decoding equipment. Because of the many different decoders available, we suggest carefully reading the owner's instruction manuals of all of the associated equipment regarding system connection. How you connect the decoder will depend upon your own needs for control of the Equalizer and/or your associated equipment. D. CONNECTING A TAPE RECORDER r,.-.,....a.._.z..,.. § 04f0. Clad rims simii ... Pr•IrOV•141, • _..t.........e --_-.....:e • FIG. 6 Since the Active Equalizer has been connected to what are normally the tape recorder terminals of your integrated amplifier, preamplifier, or receiver, extra terminals are provided on the Equalizer for the connection of a tape recorder. Follow the next five steps carefully: (Refer to Fig. 6.1 a. Turn all power off. b. Connect the RIGHT channel TAPE IN terminal on the Equalizer to the RIGHT or "B" channel OUTPUT terminal on the tape recorder. c. Similarly, connect the LEFT channel TAPE IN terminal on the Equalizer to the LEFT or "A" channel OUTPUT terminal of the tape recorder. d. Connect the RIGHT channel TAPE OUT terminal on the Equalizer to the RIGHT or "B" channel INPUT (or LINE IN) terminal of the recorder. e. Similarly, connect the LEFT channel TAPE OUT terminal on the Equalizer to the LEFT or "A" channel INPUT (or LINE IN) terminal on the recorder. Installation of the tape recorder is now complete. To play the tape recorder, simply place the TAPE switch on the 901 Active Equalizer in the MONITOR position (down). CONTROL AMPLIFIERS HAVING TWO TAPE MONITOR CIRCUITS Many modern preamplifiers, integrated amplifiers, and receivers have two tape monitor functions providing the same monitoring features for two tape recorders instead of one. However, most of these controls are constructed to prevent both monitoring switches from being turned on or "activated" at the same time. Since the BOSE Active Equalizer must be in the circuit while the 901 • speakers are being used. connecting the Equalizer in either TAPE 1 or TAPE 2 will require connecting your tape recorder to the BOSE Equalizer tape monitor circuit, not the unused TAPE monitor position found on your control amplifier. 9

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4.
ALTERNATE
METHOD
Ill
(Using
FOUR
-CHANNEL
DECODERS)
As
previously
stated,
the
BOSE
Active
Equalizer
should
be
connected
before
the
final
stage
of
amplifica•
tion
of
the
amplifier
channels
powering
the
901
speakers.
Additionally,
the
Equalizer
should
be
connected
at
a
point
in
the
signal
path
following
the
four'channel
decoder
to
prevent
any
possible
overloading
of
the
decoding
equipment.
Because
of
the
many
different
decoders
available,
we
suggest
carefully
reading
the
owner's
instruction
manuals
of
all
of
the
associated
equipment
regarding
system
connection.
How
you
connect
the
decoder
will
depend
upon
your
own
needs
for
control
of
the
Equalizer
and/or
your
associated
equipment.
D.
CONNECTING
A
TAPE
RECORDER
04f0.
r
,..,
....
a...z...
_..,
§
Clad rims
simii
...
Pr•IrOV•141,
t
e
_
...........
--_—
.....
:e
FIG.
6
Since
the
Active
Equalizer
has
been
connected
to
what
are
normally
the
tape
recorder
terminals
of
your
integrated
amplifier,
preamplifier,
or
receiver,
extra
terminals
are
provided
on
the
Equalizer
for
the
connection
of
a
tape
recorder.
Follow
the
next
five
steps
carefully:
(Refer
to
Fig.
6.1
a.
Turn
all
power
off.
b.
Connect
the
RIGHT
channel
TAPE
IN
terminal
on
the
Equalizer
to
the
RIGHT
or
"B"
channel
OUTPUT
terminal
on
the
tape
recorder.
c.
Similarly,
connect
the
LEFT
channel
TAPE
IN
terminal
on
the
Equalizer
to
the
LEFT
or
"A"
channel
OUTPUT
terminal
of
the
tape
recorder.
d.
Connect
the
RIGHT
channel
TAPE
OUT
terminal
on
the
Equalizer
to
the
RIGHT
or
"B"
channel
INPUT
(or
LINE
IN)
terminal
of
the
recorder.
e.
Similarly,
connect
the
LEFT
channel
TAPE
OUT
terminal
on
the
Equalizer
to
the
LEFT
or
"A"
channel
INPUT
(or
LINE
IN)
terminal
on
the
recorder.
Installation
of
the
tape
recorder
is
now
complete.
To
play
the
tape
recorder,
simply
place
the
TAPE
switch
on
the
901
Active
Equalizer
in
the
MONITOR
position
(down).
CONTROL
AMPLIFIERS
HAVING
TWO
TAPE
MONITOR
CIRCUITS
Many
modern
preamplifiers,
integrated
amplifiers,
and
receivers
have
two
tape
monitor
functions
providing
the
same
monitoring
features
for
two
tape
recorders
instead
of
one.
However,
most
of
these
controls
are
constructed
to
prevent
both
monitoring
switches
from
being
turned
on
or
"activated"
at
the
same
time.
Since
the
BOSE
Active
Equalizer
must
be
in
the
circuit
while
the
901
speakers
are
being
used.
connecting
the
Equalizer
in
either
TAPE
1
or
TAPE
2
will
require
connecting
your
tape
recorder
to
the
BOSE
Equalizer
tape
monitor
circuit,
not
the
unused
TAPE
monitor
position
found
on
your
control
amplifier.
9