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Connecting S115 and S112 loudspeakers 11
CP2000—Owner’s Manual
Connecting S115 and S112 loudspeakers
The CP2000 features special EQ processing that opti-
mizes the CP2000 for use with the Yamaha S115 and
S112 loudspeakers (especially the 115IV). This process-
ing is turned on and off by using the YAMAHA
SPEAKER PROCESSING switch. Yamaha loudspeakers
should be connected just like any other speaker, and for best performance the
YAMAHA SPEAKER PROCESSING switch should be set to ON. When using other
speakers, make sure the YAMAHA SPEAKER PROCESSING switch is set to OFF.
Turning On the Power
To prevent audible thumps and clicks, turn on your audio equipment in the
following order (reverse this order when turning off your equip-
ment)—sound sources, mixer, CP2000.
1 Press the [POWER] switch to turn on the CP2000.
The CP2000 starts up and the POWER indicator lights up.
The output relay closes, connecting the speakers, several seconds after the CP2000 is
turned on.
2 Press the [POWER] switch again to turn off the CP2000.
The POWER indicator goes out.
The output relay opens, disconnecting the speakers, immediately the CP2000 is turned off.
Protection System
The CP2000 features a relay-based protection system to protect
itself and the connected speakers against damage due to abnormal
operating conditions. When the protection system is active, the
speakers are disconnected from the CP2000 and the PROTEC-
TION indicator lights up.
When the CP2000 is turned on, the output relay remains open, disconnecting the
speakers, for approximately three seconds. During this time, the PROTECTION indi-
cator lights up. When the protection system has confirmed that no abnormal condi-
tions exist, the output relay closes, connecting the speakers, and the PROTECTION
indicator goes out. In addition to allowing the protection system to perform various
checks, protects the speakers against thumps and clicks as the CP2000 starts up.
When the CP2000 is turned off, the output relay opens immediately, disconnecting the
speakers, and preventing unwanted sound as the CP2000 shuts down.
If during normal operation the protection system detects that a heatsink has overheated
or a DC offset is present at a speaker output, the output relay opens, disconnecting the
speakers, and the PROTECTION indicator lights up. Once the heatsink has cooled
down, or the DC offset removed, the protection system automatically closes the output
relay, reconnecting the speakers, the PROTECTION indicator goes out, and normal
operation is resumed.
Heatsink overheating is typically caused by inadequate ventilation and it’s important
that you investigate the cause and resolve it (see page 13 for more information).
Another layer of protection is offered by the thermostatic cutout (auto-reset type) built
into the CP2000 power supply transformer. If abnormal operating conditions, such as
a shorted load or overload, continue for a long period of time, the thermostatic cutout
YAMAHA
SPEAKER PROCESSING
OFF ON
POWER
ON OFF
PROTECTION