Troubleshooting - KEF C Serie Manual De Instalación

ENGLISH INSTRUCTIONS
Controls and sockets
C4 Subwoofer Rear Panel
1. LFE / Line in input socket
2. Phase control
3. Bass boost (EQ)
4. Level control
5. Mains indicator light
6. Crossover frequency control
7. 'ON/OFF' switch (Vacation switch)
8. AC power input
Positioning
As the sub-bass (low frequency) sound produced by the subwoofer is
non-directional it can be positioned almost anywhere in the room,
although it should not be placed too close to the listener. For optimum
performance try the subwoofer in different positions to find the best place
for a boom-free sound.
Connection to AV amplifier / receiver
Connect to the amplifier subwoofer output.
Set the subwoofer frequency on the amplifier / receiver to 80Hz
(refer to the amplifier / receiver manual).
Set the crossover on the C4 to 140Hz
Set the volume on the C4 to the 7th dot
Ensure that the satellites are set to the appropriate configuration in the
amplifier / receiver menu (refer to the speaker manual).
Adjust the subwoofer volume on the AV amplifier / receiver to your
desired level (refer to the amplifier / receiver manual).
Trouble Shooting
FAULT
Mains indicator light does not come on.
Mains indicator light is on but no sound
comes from the subwoofer.
Red light no sound
Green light no sound
10
K7273_C4 manual_Rev15.indd 10
Power ON Power OFF
Red / Green
(230V Euro)
(230V UK)
(115V US)
REMEDY
Check that the subwoofer is plugged into the mains supply and that any switches are on.
Check any fuses (including the plug) or circuit breakers on the mains supply which may affect the
power to the subwoofer.
Ensure that all equipment is switched on.
Contact your dealer for further advice.
Check and adjust the level control.
Contact your dealer for further advice.
Check volume levels of subwoofer and amplifier/receiver.
Manual controls
It is possible to manually adjust the set up of the C4 instead of using the
amplifier / receiver.
A. Crossover Frequency Control
The crossover frequency control changes the upper cut-off frequency of the
subwoofer. Its effective range is from 40Hz to 140Hz at a rate of
12dB per octave.The frequency control should be adjusted to achieve the
smoothest integration between the main/satellite speakers and the
subwoofer. Clockwise rotation will increase the cut-off frequency and
anti-clockwise rotation will decrease the cut-off frequency.
1. Ideal crossover - flat response.
2. Crossover point set too low - causes dip in combined response.
3. Crossover point set too high - causes hump in combined response.
B. Phase Control
The phase control will normally be set at 0° but more output level can
sometimes be achieved in the 180° position, particularly when the
subwoofer is far away from the satellite speakers.
C.Volume Control
The volume control adjusts the output level of the subwoofer in relation to
the satellite or AV speaker output level. Clockwise rotation to increase the
output level or anti-clockwise to decrease the output level.
Bass Boost (EQ)
The bass boost control is intended to adjust the response of the subwoofer to
compensate for room conditions and user preferences. Boost is switchable
between 0, +6 and +12dB at around 40Hz.
Check the output sockets on the source equipment are correctly switched and
adjusted to provide sufficient level to drive the subwoofer.
Check that all connections between the subwoofer and the source equipment are
correct and adjust as necessary.
GB
2008-9-4 12:10:24