User Manual

2
System
The GENELEC 8040B and 8050B are
two way active monitoring loudspeakers
designed to produce high SPL output, low
coloration and broad bandwidth in a small
enclosure size. They are suitable for a wide
variety of tasks, such as near eld monitor-
ing, mobile vans, broadcast and TV control
rooms, surround sound systems and home
studios. Designed as active loudspeak-
ers, they contain drivers, power ampliers,
active crossover lters and protection cir-
cuitry. The Minimum Diraction Enclosure™
(MDE™) and advanced Directivity Control
Waveguide™ (DCW™) technologies provide
excellent frequency balance even in dicult
acoustic environments.
Drivers
The bass driver dimensions are 165 mm (6
1/2”) and 205 mm (8”) for 8040B and 8050B
respectively. The long, ow optimized reex
tube has a large cross sectional area and
terminates with a wide are at the back of
the enclosure. The high frequency driver is a
19 mm (3/4”) metal dome on the 8040B and
a 25 mm (1”) metal dome on the 8050B. Both
drivers are magnetically shielded.
Crossover
The active crossover network consists of two
parallel bandpass lters. The crossover fre-
quency is 3.0 kHz on the 8040B and 1.8 kHz
on the 8050B. The active crossover controls
(“treble tilt”, “desktop low frequency”, “bass
tilt” and “bass roll-o”) allow precise match-
ing of the loudspeakers to any room environ-
ment.
Amplifiers
The amplier unit is mounted in the rear of the
loudspeaker enclosure. The unit incorporates
special circuitry for driver thermal overload
protection. Variable input sensitivity allows
accurate level matching to console output
section.
Connections
Each loudspeaker is supplied with a mains
cable and an operating manual. Before con-
necting up, ensure that the mains switch is
o (see gure 1). Audio input is via a 10 kOhm
balanced XLR connector, but unbalanced
leads may be used as long as pin 3 is
grounded to pin 1 of the XLR (see gure 3).
Once the connections have been made, the
loudspeakers are ready to be switched on.
Mounting considerations
Align the loudspeakers correctly
Always place the loudspeakers so that
their acoustic axes (see gure 2) are aimed
towards the listening position. Vertical place-
ment is preferable, as it minimises acoustical
cancellation problems around the crossover
frequency.
Maintain symmetry
Check that the loudspeakers are placed
symmetrically and at an equal distance from
the listening position. If possible, place the
system so that the listening position is on the
centerline of the room and the loudspeakers
are placed at an equal distance from the cen-
terline.
Minimise reflections
Acoustic reections from objects close to the
loudspeakers like desks, cabinets, computer
monitors etc. can cause unwanted colouration
and blurring of the sound image. These can
be minimised by placing the loudspeaker clear
of reective surfaces. For instance, putting the
loudspeakers on stands behind and above the
mixing console usually gives a better result
than placing them on the meter bridge.
Genelec 8040B and 8050B Active Monitoring Systems