Operation Manual

AUXILIARY
High level AUX input jacks are for miscellaneous
sources such as extra tape players with self-
contained playback preamplifiers, phono cartridges
with RIAA-equalized high-level output, additional
tuners and/or receivers, TV sound outputs, and
other external components.
QUADRADIAL
In anticipation of the coming of 4-channel stereo
broadcasting, your Model 2230 is equipped with an
output QUADRADIAL jack. The signal available at
this jack is the unequalized, buffered output of the
FM discriminator. Its level, frequency response
characteristic and output impedance are ideal to
drive any 4-channel adaptor. This jack can also be
used as a simple white noise generator for fre-
quency response check of loudspeakers or ampli-
fiers, with the Model 2230 in FM mode and tuned
off from any FM signal.
MAIN IN and PRE OUT
Connections from the Model 2230 preamplifier
outputs to the power amplifier inputs are per-
formed externally. Special jumper plugs normally
interconnect these MAIN IN and PRE OUT jacks.
Removing these two special jumper plugs allows
you to use your 2230 as an independent basic
stereo amplifier and/or an independent stereo
control center. Be sure to replace the jumper plugs
between the MAIN IN and PRE OUT jacks for
normal operation.
3
REPEAT WIRI NG
AS FOR SYSTEM 1
Figure 2. Loudspeaker System Connections
LOUDSPEAKER SYSTEMS
The SPEAKER SYSTEMS terminals on the rear
panel will accomodate two stereo pairs of
loudspeaker systems of rated impedance between 4
ohms and 16 ohms. When using only one stereo
pair of loudspeakers, connect them to the MAIN
terminals. The REMOTE terminals are for a second
stereo pair of loudspeakers.
Selection of loudspeaker systems is made with the
MAIN-SPKR-REMOTE pushswitches on the front
panel.
Use caution when connecting your Model 2230 to
a loudspeaker with built-in power supply such as
an ·electro-static loudspeaker. The "common"
connection terminal of such a speaker may be
capacitively grounded through its power supply.
Make sure the GROUND terminals of the Model
2230 are connected to the "common" terminals of
such loudspeaker system.
Ordinary #18-gauge, 2-conductor lamp cord
("zipcord") may be used for normal distances (to
about 25 feet) between your 2230 Receiver and
your loudspeakers. For longer lengths, #16-gauge,
or heavier wire should be used to ensure optimum
speaker performance.
When connecting a stereo pair of loudspeakers, it is
important to ensure correct relative phasing
(polarity). When using identical loudspeakers,
simply code one wire of each pair at both ends
with a knot, tape. etc.