English Instructions; Troubleshooting - KEF V-20W Quick Start Manual

English instructions

Controls and sockets
V-20W Subwoofer Rear Panel
LFE / Line in Smart Connect input
1.
2. Phase control
3. Bass boost
4. Level control
5. Mains indicator light
6. Crossover frequency control
7. 'ON/OFF' switch (Vacation switch)
8. AC power input (230V Euro / 230V UK / 115V US)
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 V700
Refer to P.9.
Set the Volume and CROSSOVER on the subwoofer to maximum for best audio
performance from V720W.
Adjust the subwoofer volume with your TV remote.
Press the mute button 3 times quickly to enter subwoofer volume control mode.
LED indicator on V700 should show a slow pulse.
Connection to AV amplifier / receiver
Connect to the amplifier LFE subwoofer output.
All inputs work simultaneously.
Set the subwoofer frequency on the amplifier / receiver to 80Hz (refer to the
amplifier / receiver manual).
Set the crossover on the V-20W to 140Hz.
Set the volume on the V-20W 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.
If there is still no sound.
Red light no sound.
Green light no sound.
12
Power ON Power OFF
Red / Green
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.
Contact your dealer for further advice.
Check volume levels of subwoofer and amplifier/receiver.
Connection to stereo preamp / receiver
Connect to amplifier speaker or preamp or subwoofer output.
Set the crossover to 80Hz for large speakers or higher to match small speakers.
Start with the volume set at the 7th dot. Adjust the volume to match output to
your main speakers.
Manual controls
It is possible to manually adjust the set up of the V-20W 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 24dB 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
Combined Output
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 0º but more output level can sometimes
be achieved in the 180º 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 65Hz.
1
Check and adjust the level control.
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.
2 3
Subwoofer Output
2 3
+6dB
65Hz 65Hz
ENG
Satellite Output
+12dB