User Manual

connector. When using the LFE signal, also
run a cable from the LFE Out to the next
subwoofer’s LFE In.
Control Switches
BASS ROLL-OFF controls compensate for
the very low frequency boost, reducing the
20 Hz level in 4 dB steps. The settings add
to a total of 12 dB attenuation. Setting both
switches to "OFF" obtains a at response.
PHASE switches can put the subwoofer
in phase with a selected main monitor.
Incorrect phase alignment can cause a drop
in level at the crossover frequency. See
chapter "Setting the Phase Switches."
Digital LFE switch selects the low pass
frequency for the subframe selected to
reproduce LFE (see "LFE CHANNEL" below).
The frequencies are 85 Hz for "OFF" and 150
Hz for "ON."
LFE CHANNEL A/B selects which subframe
carries the LFE signal. "ON" for A, "OFF" for
B. If A is selected for LFE, the B subframe is
assumed to carry main channel audio.
LFE +10 dB function adds +10 dB of
gain. See chapter "Using the LFE +10 dB
function."
LEVEL switches scale down the subwoofer
output level. The switch settings add up and
combine with therotary level adjustment
control.
TEST TONE switch activates the 85 Hz test
tone used for calibrating the phase. See
chapter "Setting the Phase Switches."
ISS switch activates the signal sensing
automatic energy saving function.
STORED switch selects the settings stored
inside the memory of the subwoofer and
settings made by the subwoofer's controls.
The stored settings are set using the GLM
Loudspeaker Manager Software and the
GLM control network and provide superior
functionality compared to subwoofer's
own controls.
Connector Panel Light
Normally, the light on the connector panel is
green, indicating normal operational mode.
Red colour indicates amplier clipping and
yellow indicates thermal overload.If the red
or yellow warning light appears, turn down
the level.
Setting the Phase Switches
Incorrect phase alignment between main
monitors and subwoofer causes a drop
in the frequency response of the whole
system at the crossover frequency. Figure 3
shows the eect of phase dierence to the
frequency response.
The phase dierence between the main
monitors and subwoofer at the listening
position depends on the position of the
subwoofer, so the phase adjustment should
be done only after the preferred position is
found and subwoofer and monitor levels
have been aligned. GLM software control
adjusts the phase automatically, but if GLM
is not available, the following manual phase
matching can be applied.
Manual Phase
Adjustment Method
Genelec 7360A and 7370A subwoofers are
equipped with a built-in 85 Hz frequency
test tone generator for phase alignment.
The test tone generator is connected to
the subwoofer's "TEST 1" output. Connect
temporarily the monitor to this output for
manual phase alignment.
Power up the system and set the TEST
TONE switch to "ON." Now you can hear an
85 Hz test signal from the subwoofer and
the main monitor connected to the center
channel output.
1. Toggle the -180° phase switch on and o,
and set it to the position which gives the
lowest sound level at the listening position.
2. Next toggle the -90° phase switch on and
o, and again set it to the position which
gives the lowest sound level.
3. Finally, set the -180° phase switch to
the opposite setting and deactivate the
test signal. The phase adjustment is now
complete.
Using the LFE +10 dB
Function
Dolby Digital and DTS encoding formats
present the LFE channel with +10 dB gain
relative to the main channels. Surround
sound decoders may automatically add +10
dB of LFE gain to restore the level balance.
The “LFE +10 dB” function can add the
+10 dB of gain to the LFE channel in the
production stage if it is not already done
by the source connected to the monitoring
system. Switching the “LFE +10 dB” switch
to the “ON” position activates the function.
If the LFE output is at a 10 dB higher level
than other (non-LFE) channels, this switch
Figure 3. The eect of phase dierence between the subwoofer and the main monitors
Phase Difference: 0°
85 Hz
Phase Difference: 180°
85 Hz
Phase Difference: 270°
85 Hz
Phase Difference: 90°
85 Hz