UPTURNED T
series
SOUND REINFORCEMENT
ACOUSTIC RESEARCH
CONTROLLED RADIATION
User’s Manual
UPTURNED T
series
SOUND REINFORCEMENT
ACOUSTIC RESEARCH
CONTROLLED RADIATION
8
4.5 Presetting
There are two buttons on the back panel of the PSUTBASE/A to select any of
the
4
default
presets
for different systems or situations.
The “A” switch is used to select the right equalization for the configuration of
the system being operated (
UT Active Stack 1_1 system
or
UT Active Stack 2_1
system). See figure 15.
The “B” switch is used to select between two different timbres for both systems
(with 1 or 2 PSUT8xx), thereby introducing a dedicated timbre for the particular
system selected with the “A” switch.
For both systems, the near throw results in a transfer function optimized at
7 meters
while the long throw transfer function is optimized at
14 metres
.
Normally, the first setting gives a more balanced response in an area up to 10
metres, while the second one is best selected for areas from 10 to 20 metres.
These timbres can also be selected for different reasons, such as the type of
music or personal taste, for example. In particular, the timbre produced by the
long throw setting could be used for both distant optimization and at close
range to obtain a loudness effect, when playing music at low volumes or for
dance music reproduction. See figure 16.
4.6 Concurrent use as stage fill and main P.A.
UT Active Stac
k systems are perfect for simultaneous use as a
main P.A.
and
stage fill
and can be installed at the back of the musical performance to
cover the areas used by the artists and the front audience stalls.
Its main features are: the particular horizontal coverage of the sound
field created by the UT Active Stack systems (allowing coverage of the
performers in an angled position too); a blander sound decay over
distance as compared to the standard point source (due to the vertical
array configuration that generates adequate sound pressure levels on
the stalls without forcing excessively high levels on stage) and a perfect
response of the transducers without excessive resonances (making
them extremely “resistant” to the Larsen effect generally triggered by the
microphones on the stage).
The PSUT8xx loudspeakers and the PSUTBASE/A self-powered subwoofer
are therefore perfect for medium/small clubs where live music is played
without the necessary facilities to ensure good listening both on stage
and for the public, that is any situation in which there are no on-stage
monitoring systems or sound engineers to handle them. A single 1_1 or
2_1 system placed at the back of the stage allows the artists to manage
sound, knowing that the sound will be the same as that heard by the
audience. This is especially true during jam sessions, which frequently take
place without an external p.a. manager. In such cases, this is a winning
solution, providing consistently high quality (a good sound to the artists
improves their performance) and an extremely user-friendly installation
(the system is extremely portable and can be quickly uninstalled, to be
used again as required).
We would like to stress that, for live music, the separate use of the two-
channel stereo is purely related to marginal considerations about the
effects. This system does not perform a sound-related spatial function as
for home Hi-Fi reproduced sound (listening from a precise point at the
same distance from two L and R loudspeaker systems), hence having
a single sound emission point represents no drawback, especially for
small-scale live situations. One single sound point covering the entire
room is actually rather convenient for places where only two cables are
available and usually very short ones: high quality sound that is clear and
well-spread right to the back of the venue can be obtained
by adding to
the active stack systems a small professional mixer with incorporated ambient
effects
.
Two active stacks (sub + sound columns) are only required when the
sound coverage provided by a single one is not enough (all the technical
details are explained in the table below).
Regardless of these considerations, UT
Active Stack
systems can obviously
be positioned at the front of the stage and used in a traditional left/right
configuration.
Figure 15. This chart shows the frequency response (distance of 5 meters in a closed
environment, with the microphone at a height of 1.6 meters) for two systems:
1) Active Stack 1_1, with the correct presetting (for 1 PSUT8xx) and
the incorrect one (for 2 PSUT8xx), respectively the green and the red curve;
2) Active Stack 2_1, with the correct presetting (for 2 PSUT8xx) and
the incorrect one (for 1 PSUT8xx), respectively the black and blue line.
Please note the importance of selecting the correct presetting
for a balanced frequency response (green and black curves)
Figure 16. This chart shows the frequency response (distance of 5 meters
in a closed environment, with the microphone at a height of 1.6 meters)
with the near and long throw presetting, respectively the blue and the red curve
