Genelec F One Operating Manual
F One
Operating Manual
Käyttöohje
F One Active Subwoofer
General description
The Genelec F One is a very compact active
subwoofer designed to complement up to five
Genelec G One active loudspeakers or a pair
of the slightly bigger G Twos or G Threes. The
F One extends the system’s bass response
down to 35 Hz and integrates perfectly with
the main loudspeakers in any environment.
The playback level for the whole system
is conveniently controlled by the wireless
volume control provided with the subwoofer.
The F One has an integrated bass management for the five main channels which directs
the frequencies below 85 Hz to the subwoofer
and higher frequencies through the output
connectors to the main loudspeakers.
Installation
Before connecting the audio signals, ensure
that all equipment is switched off.
Pull out the battery insulating strip from
the underside of the remote control as
shown in figure 1. This strip insulates the
battery from the contacts on the remote
control during shipping and the remote control does not function before it is removed.
The subwoofer is equipped with six RCA
signal inputs (FRONT L, FRONT R, CENTER,
REAR L, REAR R and LFE) and a 3.5 mm
stereo jack input. These allow connecting the
F One to a variety of line level audio sources
with either 3.5 mm Jack or RCA type audio
connectors. Suitable sources are preamplifiers,
computer sound cards, portable audio players,
“PRE OUT” connectors on a Home Theater
receiver, etc. Two separate sources can be
connected to the 3.5 mm Jack and the FRONT
L and R inputs at the same time, but this may
cause a slight increase of the noise level.
As the F One contains its own amplifier, no
separate power amplifier is needed. Never connect the F One to the loudspeaker outputs of a
power amplifier, integrated amplifier or receiver.
Figure 1. Removing the battery insulating strip
from the remote control
Connecting a stereo system
Connect the audio signal cables from your
source to the corresponding input connectors. The F One offers two signal routes for
stereo signals, use either the LEFT and
RIGHT RCA inputs or the 3.5 mm Jack
input. Next, connect the subwoofer to the
main loudspeakers with RCA cables from
the corresponding output (OUT) connectors
on the subwoofer to the signal inputs of the
main loudspeakers.
MAINS POWER
SWITCH
ON
F OneActive Subwoofer
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CONNECTOR
SIGNAL INPUT
CONNECTORS
Figure 2. Connectors and controls of the F One.
SERIALNUMBER
WARNING
AVERTISSEMENT
SUBWOOFER LEVEL
ADJUSTMENT
292-F10T
PHASE
MAINSINPUT
50/60Hz
70W 230 V~
FRONT
STEREO
IN
L
REAR
LFE
L
R
CENTER
R
ROLLOFF
0/-90°
-2dB
SUBWOOFER
0/-180°
-4dB
LEVEL
MAX
ON
292-F10J-6
OFF
MIN
REAR
POWER
IN
L
FRONT
L
OUT
R
CENTER
R
BASS ROLL-OFF AND
PHASE CONTROLS
SIGNAL OUTPUT
CONNECTORS
Connecting a surround
system
The F One has an integrated crossover network for the five main channels which directs
the frequencies below 85 Hz to the subwoofer
and higher frequencies through the output
connectors to the main loudspeakers. When
using a surround sound processor, select a
loudspeaker setting “Large” for the channels
routed through the subwoofer.
Connect the five main channel signal RCA
cables from the signal source to the RCA
input connectors L, R, C, LS and RS.
The LFE channel of the preamplifier or
processor can be connected to the LFE IN
connector. The LFE channel on the F One
can reproduce signals up to 120 Hz.
Next connect the main loudspeakers to the
corresponding L, R, C, LS and RS signal outputs on the subwoofer with RCA cables.
Once all connections have been made,
the subwoofer and main loudspeakers are
ready to be powered up.
Positioning in the room
The placement of the subwoofer in the room
affects the overall frequency response and
sound level of the system dramatically, as at
low frequencies the effects of the room are
strong. Even a slight change in the location
of the subwoofer can cause a marked dif-
ference in the frequency balance so often
patient and methodical experimentation and
testing is needed to find the optimum placement.
The placement will also affect the bass
roll-off rate and the phase difference
between the main loudspeakers and the
subwoofer. These effects can be compensated using the controls in the subwoofer
but we recommend that at first you leave
the switches untouched and concentrate
on finding the position where the subwoofer
gives the smoothest response, and only
then use the controls to fine-tune the balance and phase alignment between the
subwoofer and the main loudspeakers.
Start by placing the subwoofer close to the
center of the front wall. We recommend a
distance of less than 60 cm / 24” to the wall.
This position gives increased acoustic loading and SPL due to the proximity of the front
wall and floor. Ideally the subwoofer and
main loudspeakers should be positioned
symmetrically and at an equal distance
from the listening position.
If the frequency balance is not quite right,
try moving the subwoofer to the left or right
along the wall so that different room modes
are excited at different levels. Positioning
the subwoofer close to a corner will boost
the bass level at lower frequencies and may
cause asymmetrical spatial imaging.
Setting the Bass
Roll-Off switches
The acoustic response of the subwoofer
may have to be matched to the characteristics of the room and the positioning in which
it will be used (see Table 1). To adjust the
subwoofer to match these characteristics
use the ‘’BASS ROLL-OFF’ control switches
located on the connector panel. When all
Roll-Off switches are ‘OFF’, a flat anechoic
response is obtained.
Setting the phase control
The effect of incorrect phase alignment
between the main loudspeakers and the
subwoofer is a drop in the frequency
response of the whole system at the main
loudspeaker / subwoofer crossover frequency. The phase difference between the
main loudspeakers and subwoofer at the
listening position is dependent upon the distance from the listener to the subwoofer in
relation to the main loudspeakers. To avoid
phase differences between the left and right
main loudspeakers and the subwoofer, the
subwoofer should be placed close to the
center of the front loudspeaker array.
Two phase matching switches in the
crossover allow compensation for incorrect
phase alignment. Four settings are provided
between 0° and -270°.
Subwoofer
placement
Near a wall -4 dB (sw 4 “ON”)
In a corner -6 dB (sw 3 “ON”)
Table 1. Suggested Bass Roll-Off settings in
typical situations
Bass Roll-Off
Coarse phase
correction method
Connect an audio frequency signal generator
to a signal input on the subwoofer which has
a main loudspeaker connected to the corresponding “OUT” connector. Set the generator
to 85 Hz. If a signal generator is not available,
it is possible to use an audio test recording
which has a test frequency in the range 70
Hz to 100 Hz. Suitable test signals can be
downloaded at www.genelec.com.
Toggle the -180°
phase switch
OFF
‘ON’ and ‘OFF’
and set it to the
ON
7
6
5
OFF
ON
7
6
5
OFF
ON
7
6
5
position which
gives the lowest
sound level at the
listening position.
Next toggle
the -90°phase
switch ‘ON’ and
‘OFF’, and again
set it to the position which gives
the lowest sound
level.
Finally, set the
-180°phase
switch to the
opposite setting.
Using the F One subwoofer
When the subwoofer is powered up or after
being disconnected from the mains supply,
the power indicator LED blinks and the
subwoofer stays muted for approximately
seven seconds. This is normal and after this
the LED lights up and playback begins.
The delay allows matching the remote
control to a specific subwoofer unit (see
chapter “Matching the remote control to the
subwoofer” below). This is only necessary
when there are several F One subwoofers
within the range of the remote control (in
adjacent rooms, for instance) and the user
wishes to avoid the situation that more than
one subwoofer reacts to the commands
given by the remote control.
The playback volume can be adjusted with
the “+” and “-“ buttons on the remote control
(see Figure 3). The LED on the subwoofer
connector panel blinks while the adjustment
is being done and stops blinking when the
minimum or maximum level of the adjustment
range is reached.
The F One can be muted by a short
push on the POWER/STANDBY button. A
new short push on the POWER/STANDBY
button or the “+“ button resumes playback.
The power indicator LED blinks approximately once per second to indicate that the
subwoofer is in “mute” mode. Pushing the button while the subwoofer is muted reduces
the volume setting.
Switch the F One to stand-by mode by
pushing and holding the POWER/STANDBY
button down until the power indicator LED
switches off. Respectively, the subwoofer
powers up again with a push on the POWER/
STANDBY button.
The F One is equipped with an automatic
signal sensing function that switches the
subwoofer to stand-by mode if no signal is
present in the audio input for approximately
one hour. The subwoofer resumes playback automatically when it detects an audio
signal being fed into any of the input connectors. Alternatively, the subwoofer can
be activated by pushing any button on the
remote control.
Automatic protection function
The F One has an integrated protection function that automatically reduces
the playback volume to a safe level if the
subwoofer is overloaded. This function
overrides commands given with the remote
control. If this occurs frequently, reduce the
playback level until the subwooofer functions normally.
Matching the remote control
to the subwoofer
When shipped, the remote controls delivered
with F One subwoofers will function with any
other F One subwoofer as well. If this is not
desirable, for instance when there are several F One subwoofers in the same premises,
VOLUME
CONTROL
BUTTONS
POWER /
STANDBY
BUTTON
Figure 3. F One remote control
and the user wishes to avoid the situation
that more than one subwoofer reacts to the
commands given by each remote control, the
remote controls can be matched to operate
only one subwoofer. This can be done during
the seven second delay in powering up that
follows after connecting the subwoofer to the
mains supply.
1. Disconnect the power supply from the
mains connector for a moment and reconnect it or use the power switch to temporarily
switch off the subwoofer. The green power
indicator LED will start blinking indicating the
seven second delay.
2. During the delay, first press and hold
down the volume “+“ button on the remote
control and then the volume “-“ button. Keep
both buttons pressed for a few seconds until
the power indicator LED on the subwoofer
stops blinking. This indicates that matching
is completed.
Now the subwoofer should only respond
to commands given by the matched remote
control, and respectively, the matched
remote control should not work with other
F One units.
Safety considerations
The Genelec F One complies with international safety standards. However, to ensure
safe operation and maintain the equipment in
safe operating condition the following warnings and cautions must be observed.
• Danger of explosion if battery is
incorrectly replaced. Replace only with the
same or equivalent type.
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