Sound Touring - DAS AUDIO Sound Products

ST-32
Sound Touring
TFSJFT
Introduction
The D.A.S. ST-32 is a compact high
efficiency 2-way vented stage monitor and
multi-purpose system.
Description
The system is made up of a cone speaker
and a compression driver mounted coaxially.
A 15" speaker with 4" voice coil is used for
the low end, while the high frequencies are
handled by a 2" exit compression driver with
4" titanium diaphragm and voice coil,
coupled to an integral conical horn. The use
of large magnetic circuitries and voice coils
assures high resistance to abuse.
The coaxial arrangement of the low and high
frequency drivers results in a directivity
response free of irregularities, which helps
overcoming microphone feedback problems.
The front baffle is angled 35º, which is
adequate for typical stage monitoring
situations.
» 2-way vented monitor wedge
» 15" speaker and 4" diaphragm compression driver
» Coaxial design results in compact size and even
directional response
» Built-in tripod socket extends range of applications
SPECIFICATIONS
RMS (Average) Power HandlingR:
Program Power HandlingP:
Peak Power HandlingK:
On-axis Frequency RangeF:
Nominal Impedance:
Minimum ImpedanceI:
On-axis Sensitivity 1W / 1 mS:
Rated Peak SPL at Full Power:
Nominal -6 dB BeamwidthsB:
(average, 500 Hz to 8 kHz)
Speech Coverage AnglesC:
Enclosure Material:
Finish:
Transducers/Replacement Parts:
Connector:
Dimensions (H x W x D):
Weight:
Shipping Weight:
Accessories (optional):
300 W
600 W
1200 W
60 Hz - 20 kHz
8Ω
6 Ω (at 65 Hz)
98 dB SPL
129 dB
85° Horizontal
85° Vertical
85° Horizontal x 85° Vertical
Wisa Birch Plywood
Durable Catalyzed Polyurethane Paint
CX-32/GM B-30 (low), GM M-8 (high)
2 paralleled NL4 Speakon, wired to ±1
45 x 54 x 62 cm (18 x 21.5 x 24.5 in)
26 kg
(57.2 lbs)
29 kg
(63.8 lbs)
TRD-2 adjustable tripod
The ST-32 has a polyamide powder coated
steel grille to protect the loudspeaker
components. The grille is covered with a
fabric that provides resistance to wear and
tear, protection from dust and dirt, and is
both acoustically transparent and flame
retardant.
An integral 35 mm socket can be used for
tripod mounting, extending the range of
applications for the system.
450
FEATURES
The enclosure is manufactured from Wisa
Birch plywood and is finished with a durable
catalyzed polyurethane paint that provides
protection against the elements and
abrasion. The wedge shape minimizes panel
vibration and cabinet modes.
535
35°
615
ALL DIMENSIONS IN MILIMETERS
R
Based on a 2 hour test using a 6 dB crest factor pink noise signal bandlimited according to IEC 268-1 (1985). All power ratings are referred
to the nominal impedance.
P Conventionally 3 dB higher than the RMS measure, although this already utilizes a program signal.
K Corresponds to the signal crests for the test described inR.
F As per IEC 268-5 (1989), re. a two octave band centred at 2 kHz. Half space anechoic.
I In practice cable and connector impedance has to be added to all impedance values.
S For the 2 kHz one octave band.
B Average of one-third octave band measures.
C There is currently no standard method of averaging the beamwidth with frequency characteristics into a single meaningful figure, which
impedes comparisons across manufacturers and very often even product lines. This, our own, criterion weighs the -6 dB coverage angles
from one-octave bands according to their contribution to speech intelligibility.
One and one-third octave bands comply to ANSI S1.11-1986.
110
ST-32
FIG. 1
100
SPL in dB
Frequency Response
Figure 1 shows the frequency response at 1 m
of a unit radiating to a half space anechoic environment and driven by a 1 W (2.83 V) swept
sine signal.
90
80
70
Impedance
Figure 2 shows impedance with frequency.
60
Distortion
Figure 3 shows the Total Harmonic Distortion
Plus Noise (solid), Second Harmonic Distortion
(grey) and Third Harmonic Distortion (dotted)
curves for a unit driven at 10% of its nominal
power handling rating.
1k
2k
5k
10k
20k
40k
20
50
100
200
500
1k
2k
5k
10k
20k
40k
FIG. 2
impedance in
10
5
frequency in Hz
30
-20
10
-30
3
-40
1
-50
20
50
100
200
500
1k
2k
5k
10k
20k
40k
500
1k
2k
5k
10k
20k
40k
frequency in Hz
distortion in %
FIG. 3
distortion in dB
100
-10
.3
beamwidth in degrees
300
200
50
20
vertical
horizontal
10
5
20
50
100
200
frequency in Hz
FIG. 5
directivity index Di in dB
25
200
100
20
50
15
20
10
10
5
5
0
directivity factor Q (R)
FIG. 4
100
20
50
100
200
500
1k
frequency in Hz
frequency in Hz
20
Product improvement through research and development is
a continuous process at D.A.S. Audio. All specifications
subject to change without notice.
500
0
NOTES. 1.Frequency response: referred to 1 m; low end
obtained through the use of near field techniques; one-third
octave smoothed for correlation with human hearing. 2.In
practice, cable and connector impedance need to be added.
3.Harmonic distortion components are not plotted beyond 20
kHz; near-field techniques used. 4.Directivity characteristics
plotted with respect to frequency are the average within the
one-third octave bands of center frequencies noted by the
marks at the bottom of the graphs, but are joined up for
display purposes. All other characteristics plotted vs.
frequency use 1/24th octave resolution. Regions of less than
1 dB below goal level and sharp notches may be ignored
when calculating beamwidths. 5.Directivity factor and index
were computed from two degree resolution vertical and
horizontal polars using sinusoidal weighting. 6.Polars were
acquired by placing the unit on a computer controlled
turntable inside our anechoic chamber. Measurement
distance was 4 m.
right/down
200
50
1
Polar Response
Figure 6 shows the one octave band horizontal
(solid) and vertical (dashed) polars for the
indicated frequencies. Full scale is 50 dB, 5 dB
per division.
100
2
Axial Directivity Q(Rθ) and DI
Figure 5 shows the above characteristics with
frequency. Thin continuous and dashed lines
show partial horizontal and vertical,
respectively, characteristics.
50
100
Beamwidth
Figure 4 shows the -3, -6 and -10 dB horizontal
(solid) and vertical (dashed) beamwidth with
frequency curves. -6 dB ones are shown with
thicker traces for clarity.
left/up
20
200
5k
10k
2k
20k
40k
1
10 dB
horizontal
2 kHz
4 kHz
1 kHz
8 kHz
500 Hz
250 Hz
vertical
125 Hz
FIG. 6
16 kHz
D.A.S. Audio, S.A.
C/. Islas Baleares, 24 - 46988 Fuente del Jarro - Valencia, SPAIN
Tel. 96 134 0525 - Tel. Intl. +34 96 134 0860 - Fax. 96 134 0607 - Fax. Intl. +34 96 134 06 07
D.A.S. Audio of
6970 N.W. 50th St. Miami, FL 33166, U.S.A.
America, Inc.
Tel. +1 305 436 0521 - Fax. +1 305 436 0528
http://www.dasaudio.com
03/2000
TE/012-02