Bose 901 Series III - Manual (Page 12)

Installation
2. Using Separate Components, Connecting Between the
Preamp and the Amplifier
The equalizer can be connected between separate pream­
plifier and power amplifier units (see Figure 6) This connec­
tion method provides complete flexibility of the preamplifier
tape monitor functions for use with one or two tape recorders
in the conventional manner The disadvantage of this con­
nection method involves using conventional loudspeakers
and headphones because the equalizer is permanently
wired into the circuit. (See SECTION V) If you do connect
the equalizer in this manner, it is suggested that the gam
controls of your power amplifier be reduced slightly from
fully clockwise for optimum system noise (consult your
amplifier owner's manual for further recommendations).
3. Using the Preamp-Out/Main-ln Circuil
An alternate method of connecting the BOSE Active Equal­
izer makes use of the PREAMP-OUT and MAIN-IN jacks
provided by many manufacturers on their receivers or inte­
grated amplifiers (see Figure 6]. Using the PREAMP-OUT/
MAIN-IN connection jacks retains the total flexibility of the
tape monitor circuitry. However, this method of connection
permanently connects the equalizer in the circuit; this may
prove Inconvenient if you are using conventional speakers
or headphones. (See SECTION V.) Due to the circuitry char­
acteristics of some receivers, the equalizer may not function
if connected to these jacks. Also, system noise may increase
slightly due to the connection of the equalizer immediately
before the power amplifier input
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