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General description
Genelec 7050B active subwoofer is a
very compact low frequency loudspeaker,
designed to extend the bass reproduction of
Genelec 8020A active loudspeakers in stereo
or surround applications and models 8030A
or 8130A in stereo applications. Adding the
7050B to these loudspeakers creates a com-
pact nearfield monitoring system capable of a
flat frequency response from 25 Hz to 20 kHz
(± 3 dB). The 7050B should not be used
in surround applications with the 8030A or
8130A due to their greater SPL capacity.
Driver
The 7050B contains a single 205 mm (8”)
magnetically shielded low frequency driver,
housed in a Genelec Laminar Spiral Enclo-
sure
TM
(LSE
TM
) bass reflex cabinet.
Crossover
The crossover contained within the amplifier
has a fixed 85 Hz low pass filter for the five
main channels. However, the signal passing
through the “OUT” connectors is full band-
width, i.e. not filtered. Because of this, the
“BASS ROLL-OFF” switch (switch 2) on the
main loudspeakers must be switched on to
avoid unwanted overlapping of the frequency
bands between the subwoofer and main loud-
speakers. Due to this and the input sensitivity
of the 7050B subwoofer, it can only be used
with Genelec 8020A, 8030A, 8130A, 1029A,
2029A and 2029B active loudspeakers. The
LFE input has a selectable 85/120 Hz low pass
filter and selectable 0/+10 dB input sensitivity.
The overall input sensitivity of the subwoofer
can be reduced from -6 dB to +12 dB for easy
level matching with the main loudspeakers.
Amplifier
The amplifier produces 70 W of output power,
with very low THD and IM distortion. Driver
overload protection and power-on signal
muting is included in the amplifier circuitry.
The amplifier also incorporates thermal over-
load and short circuit protection.
Installation
The subwoofer is supplied with a mains cable
and this operating manual. Once unpacked
inspect the subwoofer to ensure that it has
not been damaged in transport. Check that
the mains voltage marking on the back panel
matches your local mains voltage. Ensure
that both the subwoofer and the main loud-
speakers are switched off before making any
connections.
Audio connections are made with bal-
anced XLR cables. The 7050B has IN/OUT
connector pairs for five main channels and
a dedicated LFE input connector for the LFE
channel. Connect the signal cables from your
source to the female XLR "IN" connectors on
the lower connector row. Next connect XLR
cables from the corresponding "OUT" male
XLR connectors on the upper row to the
input connectors of each main loudspeaker.
Turn the volume control knob on all main
loudspeakers fully clockwise and switch the
"BASS ROLL-OFF" dip switch (switch 2) on
all main loudspeakers to "ON". This switch
actuates an 85 Hz highpass filter on the main
loudspeakers matching them to the main
channel lowpass filter of the subwoofer.
Alternatively, you can connect a stereo
pair of loudspeakers by routing the signal
cables from the source to the input connec-
tors of the main loudspeakers and an another
pair of cables from the main loudspeakers'
output connectors to the "IN" connectors on
the 7050B. In this configuration the volume
controls on the main loudspeakers affect the
playback level of the 7050B, too. The "BASS
ROLL-OFF" switch on the main loudspeakers
must be switched to "ON".
Use the "LFE IN" connector for the LFE or
Genelec 7050B Active Subwoofer