Cardioid Mode Setup; Troubleshooting - Yamaha CXS18XLF Owner's Manual

Cardioid Mode Setup

Because directivity in the low frequency range is weak, the output sound from the subwoofer diffracts not only toward
the audience but also to the stage with almost the same sound pressure. By using the Cardioid mode, bass to the
audience is summed up and bass to the stage is canceled. This suppresses the bass volume on the stage, providing
greater headroom before feedback, and resulting in more powerful bass for the audience.
In order to setup the Cardioid mode, you should process the signals correctly using a processor. Also, the signals
from an amplifier to both FRONT and REAR are required. Visit the CXS product page of the Yamaha Pro Audio
global website for details on the setting information of the processors for the CXS.
Using the [OUTPUT] jack along with a 4-pole speakON cable, you can connect the FRONT signal and REAR signal
from a 2-channel amplifier with a single cable.
2-channel amplifier
From
amplifier

Troubleshooting

Symptom
No sound. The cable is not connected properly.
The built-in protection system has been
enabled because the input volume is exces-
sive.
Sound is inter-
rupted suddenly.
The speaker unit is damaged.
When connecting the speakers in parallel, the
total impedance of the speakers is less than
the minimum load impedance of the amplifier.
(For example, when more than three eight-
ohm speakers are connected in parallel to an
The amplifier shuts
amplifier having a minimum load impedance
down.
of four ohms.)
The protection system of the amplifier has
been enabled because the input volume is
excessive.
Sound is distorted. Input volume is excessive.
If any specific problem should persist, please contact your Yamaha dealer.
4-pole speakON cable
2+/2–:
CARDIOID REAR
1+/1–:
CARDIOID FRONT
To next CXS
Possible causes
1+/1–:
CARDIOID REAR
OUTPUT
CXS
Routes the signals
CARDIOID FRONT
received via 2+/2– to
1+/1– for output.
Connect the speakON cable to the [INPUT/PARAL-
LEL] jack correctly. Make sure to connect the amplifier
outputs to the 1+/1– contacts of the speakON cable.
To reset (cool down) the protection system, lower the
volume of the input device, or stop the input. Wait for
30 seconds or longer. If the unit doesn't automatically
reset itself, there is a possibility of malfunction of the
speaker unit.
If no sound although the connection and signal level
are appropriate, there is a possibility of malfunction of
the speaker unit. Contact your Yamaha dealer.
Lower the number of speakers connected in parallel,
or use the amplifier which can drive with the total
impedance of the speakers, in order to not be less
than the minimum load impedance of the amplifier.
Wait until the amplifier cools down. Before using it
again, lower the input volume.
Lower the volume of the input device so that the limit
indicator of the amplifier lights only occasionally.
CXS
CARDIOID REAR
Possible solution
CXS series Owner's Manual 9