Crossover Filters - Genelec 8040A Datasheet

8040A Active Monitoring System
System
The Genelec 8040A is a compact bi-ampli-
fied active monitor system with performance
comparable to much larger systems. The
8040A takes full advantage of the unconven-
tional design and advanced technologies of
Genelec's 8000 Series loudspeaker range.
The all-aluminium Minimum Diffraction Enclo-
sure™ (MDE™) and advanced Directivity Con-
trol Waveguide™ (DCW™) technologies are
carefully matched with advanced amplifier and
electronic circuitry and the latest drivers. Bass
response has been widened down to 45 Hz
(-3 dB) while distortion is substantially lower
due to a uniquely new rear reflex port design.
The system's excellent directivity character-
istics and accurate imaging together with its
compact size and flexible mounting options
make the 8040A the perfect monitoring tool for
a wide range of applications.
The 8040A has been specially designed to
have a sufficient LF extension for most situ-
ations. However if greater SPL's and a lower
cutoff frequency are required, it can be com-
plemented with a Genelec 7060A or 7070A
subwoofer.
Integrated construction
The 8040A is very easy to set up and use,
the only connections required are the mains
supply and the line level input. The input is
made via a balanced female XLR connec-
tor. The input sensitivity of the 8040A can be
adjusted for easy level matching with other
audio equipment.
The integrated design allows the amplifiers
and the drivers to be calibrated as a single
unit, eliminating the effects of component tol-
erances and ensuring consistent production
quality.

Crossover filters

The amplifier unit contains an active cross-
over, a feature more commonly used in large
and expensive control room monitors. This
is the ideal method for dividing the input
signal between the driver units. The active
crossover allows the overall response of the
system to be optimized to an extent impos-
sible with a passive system. To maintain uni-
form frequency balance in differing acoustic
environments, special calibrated controls are
included in the active crossover network.
These controls include "treble tilt", "bass tilt"
and "bass roll-off" functions.
A new function, "desktop low frequency"
control attenuates the bass frequencies
around 160 Hz by 4 dB. This feature is
designed to compensate for the boost often
occurring at this frequency range when the
loudspeaker is placed upon a meter bridge,
table or a similar reflective horizontal sur-
face.
Applications
• Near Field Monitoring
• Broadcast & TV Control Rooms
• Audio Video Post Production
• Mobile Vans
• Project / Home Studios
• Digital Workstations
• Multimedia Production and
Playback
Amplifiers
The bass and treble amplifiers produce
90 W of output power each, with very low
THD and IM distortion values. Each amplifier
is designed to precisely match the driver it is
connected to, thus ensuring the highest sub-
jective sound quality currently possible. The
amplifier unit also contains a protection circuit
that monitors the output levels and prevents
any damage to the drivers. This makes the
system immune to overloads and spurious
signals.
Drivers
A 19 mm ( / ") metal dome tweeter is loaded
3
4
by an advanced DCW™ waveguide, which is
integrated into the one piece front baffle. The
improved DCW™ provides superior directivity
charcteristics and perfect matching between
the drivers.
The 165 mm (6.5") bass cone driver is
mounted in a newly designed bass reflex
enclosure. The long, flow optimized reflex
tube has a large cross sectional area and
terminates with a wide flare at the back of
the enclosure.
Protective grilles are positioned in front of
both drivers. Magnetic shielding is standard
on the 8040A. Shielding is vital for applica-
tions such as video post production, where
stray magnetic fields must be minimized.