System
The bi-amplified GENELEC 1031A is a two
way active monitoring speaker designed to
produce high SPL output, low coloration and
broad bandwidth in a small cabinet size. The
1031A is ideal for applications where space
is at premium such as Near Field monitoring,
mobile vans, broadcast and TV control rooms,
surround sound systems and budget and
home studios. Designed as an active speaker,
the 1031A contains drivers, power amplifiers,
active crossover filters and protection circuitry.
The Directivity Control Waveguide™ (DCW™)
technology used provides excellent frequency
balance even in difficult acoustic environments.
Drivers
The low frequencies are reproduced by a
210 mm (8”) bass driver loaded in a 15 liter
vented cabinet. The -3 dB point lies at 47 Hz
and the frequency response extends down to
43 Hz (- 6 dB).
The high frequency driver is a 19 mm
(3/4”) metal dome. Uniform dispersion con-
trol is achieved with the innovative DCW
Technology pioneered by Genelec, which
also provides perfect phase and delay uni-
formity at the crossover frequency.
Both drivers are magnetically shielded.
Crossover
The active crossover network consists of
two parallel bandpass filters. Acoustically,
the filters are complementary and the slopes
are 24 dB/octave. The crossover frequency
is 2.2 kHz. The active crossover controls
(‘treble tilt’, ‘bass tilt’ and ‘bass roll-off’) allow
this speaker to be exactly matched to any
room environment.
Amplifiers
The amplifier unit is mounted to the rear
of the speaker enclosure on quick release
vibration isolators, to ensure rattle free
operation and long term reliability. The bass
and treble amplifier produce respectively 120
Watts of short term power. The peak output
sound pressure level of the 1031A exceeds
120 dB at 1 m. The unit incorporates special
circuitry for driver overload and amplifier
thermal overload protection. Variable input
sensitivity allows for accurate level matching
to console output section.
Installation
Each 1031A monitor is supplied with a
mains cable and an operating manual.
After unpacking, place the speaker so that
its acoustical axis (see figure 2) is aimed
towards the listening position. Do not place
the speaker in a horizontal position as this
may cause acoustical cancellation problems
around the crossover frequency.
Sufficient cooling for the amplifier must
be ensured if the speaker is installed in a
restricted space such as a cabinet or inte-
grated into a wall structure. The minimum
clearance for the amplifier is 10 centimeters
(4") to any object. The space adjacent to the
amplifier must either be ventilated or suf-
ficiently large to dissipate heat so that the
ambient temperature does not rise above 35
degrees Celsius (95°F).
Before connecting up, ensure that the
mains switch is off (see figure 4). Check
that the mains voltage selector is correctly
set (Models sold in Europe have a fixed 230
V setting). Audio input is via a 10 kOhm bal-
anced XLR connector, but unbalanced leads
may be used as long as pin 3 is grounded
to pin 1 of the XLR (see figure 3). Once the
connection has been made, the speakers are
ready to be switched on.
Setting the input sensitivity
The input sensitivity of the speakers can be
matched to the output of the mixing console,
or other source, by adjusting the input sensi-
tivity control on the rear panel (see figure 4).
A small screwdriver is needed for the adjust-
ment. The manufacturer’s default setting for
this control is -6 dBu (fully clockwise) which
gives an SPL of 100 dB @1m with -6 dBu
input level. Note that to get the full output
level of 110 dB SPL, an input level of +4dBu
is needed in this setting.
Setting tone controls
The response of the system may also have
to be adjusted to match the acoustic envi-
ronment. The adjustment is done by setting
Genelec 1031A Monitoring System
EC Declaration of Conformity
This is to certify that the Genelec Monitoring
System 1031A conforms to the following product
specifications:
Safety:
EN 60065
EMC:
EN 55013, EN 55020,
EN 61000-3-2 and EN 61000 3-3
The product herewith complies with the require-
ments of The Low Voltage Directive73/23/EEC
and EMC Directive 89/336/EEC as amended by
Directive 93/68/EEC
Signed:
Ilpo Martikainen
Position:
Managing Director
Date:
20-Sep-2001
