Genelec 7050B Datasheet page 2

7050B Active Subwoofer
System
The Genelec 7050B active subwoofer is a
very compact low frequency loudspeaker,
designed to extend the bass reproduc-
tion of Genelec 8020A active loudspeak-
ers in stereo or surround applications
and models 8030A or 8130A in stereo
applications. Adding the 7050B to these
loudspeakers creates a compact near-
field 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 (LSE ) bass reflex cabinet.
TM TM
Crossover
The built-in crossover unit has five signal
input and output channels (L/C/R Front and
L/R Rear) and a LFE input, providing great
flexibility and easy connection. The discrete
LFE signal input is equipped with a selectable
85/120 Hz low-pass filter and a 0/+10 dB LFE
sensitivity switch.
The amplifier has adjustable sensitivity,
bass roll-off and phase matching controls
to tailor the response of the subwoofer to its
environment.
The crossover has a fixed 85 Hz low pass
filter for five main channels. However, the
signal passing through the "OUT" connectors
is full bandwidth, 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 overall input sensitivity of the sub-
woofer can be reduced from 0 dB to -18 dB
for easy level matching with the main loud-
speakers.
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.
LSE cabinet construction
TM
Like the larger Genelec 7000 series subwoof-
ers, the 7050B features the new Genelec
Laminar Spiral Enclosure TM (LSE
reflex cabinet. The cabinet is made of sheet
Main Features:
• LSE™ Power efficient port/
enclosure design
• Unparalleled low frequency
performance
• Precise integration to Genelec
8020A or 8030A systems
metal rolled into a spiral shape and clamped
between thick MDF side panels. The spiral
forms a seamless, gently curving reflex tube
with exellent laminar flow characteristics and
minimal turbulence noise. The curved shape
also offers excellent structural stiffness and
optimal packing of a very long reflex tube into
a small space.
The overall construction of the 7050B
is rugged and reliable: The amplifier unit is
mounted on vibration absorbers to ensure
rattle-free operation and the handsome cast-
aluminium grille protects the magnetically
shielded 8 inch driver.
Why a subwoofer?
For applications, such as computer mul-
timedia work and most types of near field
monitoring, the Genelec 8020A and 8030A
are appropriate monitor systems. However
if lower LF cutoff and more LF SPL are
required, the 7050B subwoofer has been
specifically designed to complement these
compact loudspeakers. When combined they
give a frequency response comparable to
some larger Genelec models - one of the dif-
ferences is the greater SPL's offered by larger
systems.
The 8020A/8030A and 7050B combination
offers great flexibility in loudspeaker place-
TM ) bass ment. Due to the small physical size of the
main loudspeakers, they can be located on