Integrated Amplifier User Guide

3
ENGLISH
BEFORE MAKING CONNECTIONS
Your speaker system must satisfy the below conditions. If it
does not, the PM-15S1’s protective circuit will trip, whereby
preventing proper playback. In some cases, the amplifier and
speakers may be damaged.
• If using 1 set of speakers, total speaker impedance must be
4Ω or more.
• If using 2 sets of speakers, total speaker impedance must
be 8Ω or more.
WIRING SPEAKER CABLE
• Be careful not to short circuit in wiring speaker cables.
• Peel off the corting of speaker cable as shown below.
• Wiring with speaker cable.
Approx. 1 cm
Cut
the corting
of cable.
Peel off the
edge of cable.
Twist
conductors.
Turn counter-clockwise
to loosen.
Insert conductor
of cable.
Turn clockwise
to tighten.
• Wiring with “Y” style terminal
Turn counter-clockwise
to loosen.
Insert conductor. Turn clockwise
to tighten.
CD
player,
etc.
Bi-wiring
connection
Speaker system
Band
pass filter
Mid/high
speaker
Low
speaker
Complete bi-amp connection Speaker system
CD
player,
etc.
PM-15S1 bi-
amp mode
Band
pass filter
Mid/high
speaker
Low
speaker
PM-15S1
Here following are explained two types of connections that
improve sound quality. The speakers in these explanations
have low and mid/high input jacks that support a bi-amp con-
nection. To determine whether or not your speakers support a
bi-amp connection, check in the instruction manual that came
with your speakers or contact the manufacturer.
BI-WIRING CONNECTION
A bi-wiring connection separately connects the low and mid/
high jacks of the speaker to the amplifier using separate
speaker cables. Because separate cables are used for low
and mid/high sounds, the return current generated in the low
speaker causes little interference with the mid/high speaker.
The PM-15S1 and speakers of Connection Example 1 (pg. 5)
use a bi-wiring connection, therefore also refer to that page
for help.
COMPLETE BI-AMP CONNECTION
Proposed by Marantz, the complete bi-amp connection en-
hances the bi-wiring connection. With it, the low and mid/high
amplifiers are separate and independent of the preamplifier,
therefore interference between low and mid/high sounds is
reduced to a minimum. As a result, a wide sound environment
can be reproduced. Connection Example 3 (pg. 7) connects
two PM-15S1s by FCBS in a complete bi-amp connection,
therefore also refer to that page for help.