Bose 901 Series II - Manual (Page 8)

2. ALTERNATE METHOD I
(Using PRE-AMP OUT and MAIN IN Connections with Receivers or Integrated Amplifiers (Refer to Fig. 4.)
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FIG. 4
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An alternate method of connecting the BOSE Active Equalizer makes use of the PRE-AMP OUT and MAIN
IN jacks provided by many manufacturers on their receivers or integrated amplifiers. To do this refer to
your receiver and integrated amplifier owner's instruction manual for separating the main and preamplifier
sections of their units. (This is usually accomplished by removing shorting wires or plugs and/or moving a
slide switch). Connect the PRE-AMP OUT terminals to the Equalizer INPUT terminals, and connect the
EQUALIZER OUTPUT terminals to the MAIN IN terminals of the receiver or integrated amplifier. With
this method of connection, leave the TAPE switch on the Equalizer in the NORMAL position. Tape re­
corders are connected to the receiver or amplifier in the conventional manner. The disadvantage of this
method of connection is that it is difficult to use conventional speakers or headphones, because the Equal­
izer is always in the circuit.
ALTERNATE METHOD M
(Using separate PREAMPLIFIERS and POWER AMPLIFIERS)
The Equalizer can be connected in systems that include separate preamplifiers and power amplifiers,
between the preamplifier and power amplifier (See Fig. 5). The advantage of this method of connection is
that the tape monitor functions of the preamplifier are still available for connection to a tape recorder in
the conventional manner. One disadvantage of this method of connection is that it is difficult to use an
additional pair of conventional loudspeakers or headphones because the Equalizer is permanently in the
circuit. It IS advisable with most power amplifiers having gam controls that these controls be turned
fully clockwise (consult your amplifier manufacturer's owner's manual for recommendations).