Specifications
SPECIFICATIONS (CONT'D)
*
Do
not
use
Shure
A3S-S
Tilt
Stand;
this
stand
will
not
fit
the
SR102
Column.
SR103
-
A102A 70-Volt
Transformer
A103A Wall Mount
Speaker Column
Bracket
Supplied Accessories
Optional Accessories
-
FREQUENCY (Hz)
SR102
One 15m (50-foot)
heavy-duty cable with
locking phone plugs
A1 02A 70-Volt
Transformer
A3S-T Speaker Tilt
Stand*
A50XC 15m (50-foot)
Extension Cable
with male and female
phone plugs
/
-2
0
/
FIGURE C. TYPICAL FREQUENCY RESPONSE
ANECHOIC RESPONSE
------
TYPICAL BASS RESPONSE RISE
DUE
TQ ROOM REVERBERATION
INSTALLATION
-3
0
60
8'0
100
200
400
600 IK
ZK
4K 6K 8K
IOK
20K
General
In planning a sound system using the SR102 or
SR103 Columns, care must be taken to observe the
horizontal (1400) and vertical
(65O) sound distribution
of the Columns. Maximum coverage for source-oriented
installations is generally obtained with Columns on
each side of the sound source and as far forward
as possible, with each Column tilted slightly either
downward (for wall- or ceiling-mounted Columns) or
upward (for free-standing Columns). The angle of tilt
(assuming a single Column to either side of the sound
source) should be such that an imaginary line from
the center axis of the Column runs to the back row
of the audience area. The
SR102 Column is designed
to accept the Shure
A3S-T tilt stand, which provides
a maximum tilt angle of 30 degrees. For "clustered"
Column installations covering a wide area, each Col-
umn should be positioned so that its angle of coverage
coincides with that of the Column next to it as their
sound output enters the audience area.
When used for distributed-speaker systems, the
Columns are generally mounted at equidistant intervals
over the area to be covered. Wall- or ceiling-mounting
LEGEND
-
250
Hz
FIGURE
D.
TYPICAL POLAR RESPONSE
is usually employed, although free-standing Columns
raised several feet or more from the floor are used
quite satisfactorily.
The problem of audience penetration may be likened
to illuminating a dark area with a floodlight: the object
is to provide maximum area coverage (audience) with
the available floodlights (columns). At the same time,
care must be taken to avoid illuminating reflective
surfaces. A blinding reflection (reverberation or
echoes) may be more of a problem than inadequate
coverage of the desired area.
Of the remaining common sound installation prob-
lems, acoustic feedback can usually be dealt with by
judicious
Column/microphone placement, and/or the
use of feedback filters on the audio console. Back-
ground
noise or acoustic absorption conditions gen-
erally require a greater volume level to maintain the
proper audio level. However, it must be remembered
that excessive volume may be intolerable to that part
of the audience nearest the Columns. In this case, or
in those cases where the architectural design leaves
audience areas that are not reached by the Columns,
the use of secondary or auxiliary speaker systems
should be considered. If these are used, the coincident
considerations of delay and phasing must also be
faced.
3