Connections; Precautions - Pioneer D-23 Operating Instructions Manual

CONNECTIONS

CONNECTION TO THE PREAMPLIFIER UNIT
1.
Connect the INPUT terminals of D-23 to the
OUTPUT terminals
Fig. 5), making sure that left (L) and right
channels are connected correctly. In the D-23,
all upper row terminals are for left channel, and
all lower row terminals are for right.
2. Connect the D-23 power supply cord to the
switched AC outlet on the rear panel of the
preamplifier.
Turn D-23's power switch ON. All consequent
turning ON and OFF of the preamplifier power
supply switch will thus automatically switch
D-23 ON and OFF.
CONNECTIONS TO POWER AMPLIFIER UNITS
1.
Connect each of the OUTPUT terminals (HIGH,
MID-HIGH, MID-LOW, and LOW) on the rear
panel of D-23 to the INPUT terminals of the
respective stereo power amplifiers (see Fig.
Be sure that left and right channels are con­
nected correctly.
2. Now connect the power supply cord of each
power amplifier unit
(including the AC outlets on the rear panel of
the preamplifier) whose power output capacity
exceeds the maximum power consumption of
the power amplifier.
Stereo preamp
Stereo
power
amplifiers
Left Right
Tweeters
of the preamplifier (see
(R)
5).
to any power socket
I
ifier
Left Right
Mid-high speakers

PRECAUTIONS

Check that all connections are firm and safe.
•
Loose connections may result in loss of sound,
generation of noise, or damage to the speakers.
When connecting to the speakers, make doubly
•
sure that the speaker's reproduction frequency
range corresponds to the correct output terminal
on the rear panel of the D-23. Incorrect connec­
tions could result in damaged speakers.
Besides left and right channels, the power ampli­
•
fiers and the
connection of the plus (+) and minus(-) polar­
ities.
NOTE:
Depending upon
SLOPE
ing polarities can sometimes improve results. For details,
see page
8.
Always wait until all connections have been
•
properly checked
supply ON.
In order to protect the speakers against possible
•
rupture due to unexpected noise or extraneous
frequencies beyond the speaker's range it is
recommended that a capacitor be inserted be­
tween the power amplifier and speaker ter­
minals. For further details, see the section on
"Protective capacitors for speakers" on page
It is also recommended that phase differences
•
between input
stereo power amplifiers be checked prior to
connecting to the D-23.
INPUT OUTPUT
HIGH MID-HIGH MID-LOW LOW
GND
L L
R R
Left Right
Mid-low speakers
speakers also require correct
selection, connection of oppos­
before turning the
and output terminals of the
Left Right
Fig.
Woofers
power
10.
5