Figure 2. Connectors and controls of the F One.
the corresponding output (OUT) connec-
tors on the subwoofer to the signal inputs
of the main loudspeakers.
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 loud-
speakers. 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 difference in the frequency balance
so often patient and methodical experi-
mentation 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 compen-
sated 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 bal-
ance 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 posi-
tioned symmetrically and at an equal dis-
tance 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 differ-
ent 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 characteris-
tics 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 fre-
quency. 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
MAX
MIN
SUBWOOFER
LEVEL
MAINS INPUT
50 / 60 Hz
70 W 230 V~
IN
OUT
LFE
L
L
FRONT
REAR
L
-2 dB
ROLL OFF
PHASE
POWER
FRONT
L
REAR
ON
OFF
CENTER
R
R
R
R
0/-180°
STEREO
IN
0/-90°
-4 dB
292-F10J-6
CENTER
F One Active Subwoofer
MAGNETICALLY SHIELDED
www.genelec.com MADE IN FINLAND
TO WATER OR MOISTURE. NO USER SERVICEABLE PARTS
ELECTRIC SHOCK HAZARD. DO NOT OPEN. DO NOT SUBJECT
L'INTÉRIEUR REMPLAÇABLE PAR L'UTILISATEUR. ADRESSER
RISQUE DE CHOC ÉLECTRIQUE. NE PAS OUVRIR. NE PAS
EXPOSER À L'EAU OU L'HUMIDITÉ. AUCUN COMPOSANT À
AVERTISSEMENT
WARNING
INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
TOUTE RÉPARATION À UN PERSONNEL QUALIFIÉ.
292-F10
T
ON
SERIAL NUMBER
MAINS POWER
SWITCH
MAINS
CONNECTOR
SIGNAL INPUT
CONNECTORS
SIGNAL OUTPUT
CONNECTORS
SUBWOOFER LEVEL
ADJUSTMENT
BASS ROLL-OFF AND
PHASE CONTROLS
