The wall can also be constructed of a com-
bination of materials to achieve high acousti-
cal structural mass that will disable low fre-
quency sound propagation and provide high
LF sound isolation (see figure 6). Acoustic
consultants will be able to provide details and
design these structures.
Ensure that the enclosure is flush with the
surface of the wall. Discontinuities in the loud-
speaker mounting wall will cause diffraction,
which leads to inferior frequency response and
stereo imaging. So, if a decorative cloth frame
is used to cover the wall, make sure that the
edges adjacent to the speaker are less than
20 mm (
3
/
4
”) deep. The cloth must be very thin
Tricot or an acoustically transparent material
otherwise the high frequency response of the
system will be adversely affected. Genelec
approved cloth grilles are available.
Mode indicator LED
The Genelec HT320BC is provided with a
three-colour indicator LED on the DCW™
panel. When the LED is green, it indicates that
the loudspeaker is ready for use. Standby mode
is indicated by yellow colour. Amplifier clipping
is indicated by a blinking red light and thermal
protection mode by a constant red light. If clip-
ping is indicated reduce the signal level so that
the LED stops blinking. If the red LED stays on
constantly, switch off the loudspeaker and the
audio source and let the amplifier cool down.
Check that the ventilation around the amplifier
is not blocked. There should be a clearance of
more than 100 mm (4”) between the amplifier
face panel and any solid surface at the back. If
the red light does not come off, contact author-
ised Genelec service.
The LED can be deactivated if you find it
disturbing in a darkened room by turning both
the "POWER LED" and "STANDBY LED"
switches on the amplifier panel to "OFF".
Maintenance
The air filter on the left side of the RAM5
amplifier must be cleaned every six months.
Remove the decorative front plate and pull
the filter out. Check the filter and replace it
with a new one if any damage or brittleness
can be found.If the filter is in a good condi-
tion, carefully clean it with compressed air.
No other serviceable parts are to be found
within the loudspeaker enclosure or the
amplifier unit. Any maintenance or repair
should only be undertaken by qualified serv-
ice personnel.
Safety considerations
Although the HT320BC has been designed
in accordance with international safety stand-
ards, to ensure safe operation and to main-
tain the instrument under safe operating con-
ditions, the following warnings and cautions
must be observed:
1. Servicing and adjustment must only
be performed by qualified service
personnel. The amplifier must not be
opened.
2. Do not use the loudspeaker with an
unearthed mains cable or unearthed
mains connection as this may lead to
personal injury.
3. This loudspeaker is capable of
producing sound pressure levels in
excess of 85 dB, which may cause
permanent hearing damage.
4. Free flow of air around the amplifier is
necessary to maintain sufficient
cooling. Do not obstruct airflow around
the amplifier.
5. To prevent fire or electric shock, do not
expose the unit to water or moisture.
Do not place any objects filled with
liquid, such as vases on or near the
loudspeaker or the amplifier.
6. Note that the amplifier is not
completely disconnected from the AC
mains service unless the mains cable
is removed from the amplifier or the
mains outlet.
Accessories
Order code
Protective grille
1038-409BC
Guarantee
This product is supplied with two year guar-
antee against manufacturing faults or defects
that might alter the performance of the
HT320BC unit. Refer to supplier for full sales
and guarantee terms.
Figure 8: The curves above show the effect of the ‘bass’, ‘mid’ and
‘treble’ level controls, and the ‘bass tilt’ and ‘bass roll-off’ controls
on the free field response of the HT320BC, measured at 2 m.
Figure 9: The curves above show the horizontal directivity
characteristics of the HT320BC in its horizontal configuration
measured at 2 m.
