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Genelec HT320AC Active Home Theater System
System
The Genelec HT320AC is a dedicated
center channel loudspeaker for three
channel (LCR) and Surround systems. Its
compact cabinet has been designed for
optimum placement in the limited space
above or below a video monitor or screen.
The HT320AC is a three-way active loud-
speaker including drivers, multiple power
amplifiers and active crossovers. The
amplifiers and crossovers are built into a
separate rack mount chassis.
The system is designed for room vol-
umes up to 250 m
3
/ 8800 ft
3
with maximum
listening distances up to 6.1 - 7.6 meters
(20-25 ft) The HT320AC is recommended
to be flush mounted into the wall structure,
but it can also be used as a free-standing
loudspeaker.
The unique Directivity Control Wavegui-
TM
TM
de
(DCW
) Technology provides
excellent stereo imaging and frequency
balance even in difficult acoustics envi-
ronments. The fast, low distortion amplifiers
are capable of driving the system to peak
output levels in excess of 124 dB SPL at 2
m with program signals. Versatile crossover
controls allow for precise matching of the
system to different acoustic conditions.
Drivers
The bass frequencies are reproduced by
two 250 mm (10") bass drivers loaded with
a 110 liter vented box. The -3dB point is
33 Hz and the low frequency response
extends down to 29 Hz (-6 dB). The mid-
range frequencies are reproduced by a pro-
prietary 130 mm (5") direct radiating cone
TM
driver loaded with a DCW
. The high fre-
quency driver is a 25 mm (1") metal dome
also loaded by a DCW
TM
. The HT320AC is
magnetically shielded in order to minimise
interference with video monitors
Crossover filters
The crossover frequencies of the active
crossover network are 410 Hz and 3.0 kHz.
Special calibrated controls are included in
the crossover in order to obtain a uniform
frequency balance under different acoustic
conditions. ; the Bass, Midrange and Treble
Level controls operate in 1 dB steps. Fur-
thermore, the low frequency Tilt and Roll-
Off controls both have four 2 dB steps to
allow refined LF response tailoring.
A high-pass filter is included in the LF
channel to protect the woofer from sub-
sonic signals. The crossover network is
driven by an active balanced input stage
fed by a 3 pin XLR. Variable input sen-
sitivity allows for accurate to the signal
source output.
Amplifiers
The bass, midrange and treble ampli-
fiers produce 400 W, 120 W and 120 W,
respectively of short term power with very
low THD and IM distortion values. The
negative output impedance of the woofer
amplifiers improves acoustic transients.
The system incorporates special circuitry
for driver overload protection and amplifier
thermal protection.
Installation
Each HT320AC loudspeaker is supplied
with a separate amplifier unit in a 19" 12 U
rack mount chassis, a 10 meter connecting
cable set, a mains cable and an operating
manual. Once unpacked, place the loud-
speaker in its required listening position,
taking note of the line of the acoustic axis
(see figure 1) and install the amplifier
into a standard 19" rack. Sufficient cool-
ing 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
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