Installation - Genelec 1038CF Operating Manual

Genelec 1038CF Tri-amplified Monitoring System
System
The Genelec 1038CF is a three-way active
monitoring system including drivers, multi-
ple power amplifiers and active crossovers.
The system is designed for medium sized
control rooms and suited for music recording
studios, film and video post-production and
general broadcasting monitoring as well as
for mastering suites.
The unique Directivity Control Waveguide™
(DCW™) Technology developed by Genelec
provides excellent stereo imaging and fre-
quency balance even in difficult acoustic
environments. Versatile crossover controls
allow for precise matching of the loudspeaker
system to different acoustic conditions.
Drivers and enclosure
construction
The low frequencies are reproduced by two
210 mm (8") bass drivers. The low frequency
(-3 dB) cutoff point is 55 Hz and the high fre-
quency response extends up to 20 kHz (-3
dB).
The midrange and high frequency driver
layout features a proprietary 130 mm (5")
direct radiating cone for the MF and a 25 mm
(1") metal dome for the HF loaded by propri-
etary Directivity Control Waveguide.
Crossover filters
The active crossover network consists of
three parallel bandpass filters. The crossover
frequencies are 420 Hz and 3.2 kHz. Bass,
midrange and treble level controls with 1 dB
steps are included in the crossover to obtain
uniform frequency balance in different acous-
tic conditions. The low frequency Tilt and
Roll-off controls both have four 2 dB steps
to allow refined low frequency response tai-
loring. The crossover network is driven by
an active balanced input stage, fed by a 3
pin XLR connector. Variable input sensitivity
allows for accurate level matching to console
output section.
Amplifiers
The bass, midrange and treble amplifiers
on the 1038CF produce 180 W, 120 W and
120 W of short term power. The amplifiers
are designed to operate at very low THD and
IM distortion values and incorporate special
circuitry for driver overload protection and
amplifier thermal protection.

Installation

Each 1038CF monitor is supplied with an
integrated amplifier unit located at the back
of the enclosure, a mains cable and an oper-
ating manual. Once unpacked place the
loudspeaker in its required listening position,
taking note of the line of the listening axis
(see Figure 1).
Sufficient cooling for the amplifier must
be ensured. The minimum clearance for the
amplifier is 10 centimeters (4") to any object.
The space adjacent to the amplifier must
either be ventilated or sufficiently large to
dissipate heat so that the ambient tempera-
ture does not rise above 35 degrees Celsius
(95°F). If the loudspeaker is flush mounted
into the wall structure, the amplifier must be
placed separately into an equipment rack
using an optional rack mount kit (see sec-
tions 'Flush mounting' and 'Accessories').
Before connecting up, ensure that the
mains switch is off (see Figure 2). Check
that the mains voltage selector is correctly
set to your local voltage. Audio input is made
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. Once
connection has been made, the loudspeak-
ers are ready to be powered-up.
Setting the input sensitivity
Adjustment of the input sensitivity of each
loudspeaker can be made to match the output