Series R y ST. Manual de Usuario /
R and ST Series. User's Manual
50
3. PLACEMENT AND MOUNTING
3.1 Placement
Place the speakers ahead of the microphones. Feedback
(howling) occurs when the microphones pick up the sound
that comes out of the speakers and feed it back to the system.
Feedback can cause damage to the speaker system. If space
is limited, direct the speakers towards areas where there are
no microphones to minimise feedback.
When using a turntable, place the speakers far from the
turntables. If the speaker signal is picked up by the stylus and
re-amplified, low frequency howling will occur. The use of a
very heavy base for the turntable is recommended.
Bass output for bass cabinets in general will increase when
placed against floors and/or walls. In this case, you may need
to attenuate the gain of the low frequency section or use
attenuation on the low frequency equalisation.
3.2 Tripod use
The more portable models feature a tripod socket for use with
standard 35-mm tripods such as the D.A.S. TRD-2. Be careful
not to raise the units too high on the tripod, as they may
become unstable. Do not use a tripod on sloped surfaces.
3.3 Use on SUB-18R / ST-18 with TRD-4
The top panel of models SUB-18R and ST-18
features a tripod socket for use with
standard 35-mm poles. This allows pole
mounting for systems that have tripod
capability. The TRD-4 is a 35-mm pole that
raises the top box 51 cm (21").
Do not mount systems this way on sloped
surfaces.
3.4 Stage monitor use
Operation angles for boxes capable of
monitor use are illustrated below.
3.5 Rotating the horns
Models ST-15 and R-212 have rotatable horns. This allows
maintaining the original horn characteristics (wider horizontal
coverage than vertical) when mounted in horizontal position.
This feature is particularly useful in low ceiling rooms.
To rotate the horns you will need to remove the front grille
first, then the horn. Then carefully rotate the horn 90 degrees,
being careful not to disconnect the wires. Then screw the horn
back into place and replace the grille.
3.6 Weather resistance
R and ST series cabinets are manufactured from phenolic
plywood finished with a special polyurethane paint that
protects the wood from water and humidity. Additionally, ST
series units have an acoustically transparent cloth that will
further protect the components from the rain.
Speaker cones are protected against humidity at the factory
with a fine coat of varnish. If the speakers will be exposed to
the elements, you may additionally treat the paper cones with
a water repelling spray or by applying a coat of varnish.
Always bear in mind that any coating should be very light so
as not to change the weight of the cone significantly.
In fixed installations, do not expose the components to direct
rain. For open-air applications, place the speakers under some
form of canopy or cover.
www.audiovias.com
