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Technical data, EASE
™
plots, SoundTubeSPEC
™
software & product downloads available at www.soundtube.com
HP890i
Open Ceiling Speaker
Preliminary Technical Information for System Engineers
Patented SoundTube
Technologies
SoundTube Entertainment is consis-
tently developing new technologies that
enhance audio product performance.
SoundTube Entertainment innova
-
tions are protected by multiple U.S. and
international patents, which explicitly
cover SoundTube dome, enclosure,
mounting and dispersion technolo
-
gies. SoundTube Entertainment actively
defends it patents in order to protect
SoundTube resellers and end-users.
Technical Data and
Specification Tools
Technical Data
SoundTube Entertainment strives to
provide complete and effective technical
information and data to dealers, engi
-
neers and designers. All data are avail
-
able from SoundTube Entertainment or
at www.soundtube.com.
Data Acquisition
All performance data acquired at
SoundTube’s Technical Measurement
Center (TMC) are analyzed using a vari
-
ety of standard measurement techniques,
including Measured Length Sequence
(MLS) and Time Delay Spectrometry
(TDS). Performance, development and
data acquisition tools include: Gold Line
TEF 20, CLIO, LMS, LEAP, and propri
-
etary modeling software. EASE
™ data
are acquired through an automated TEF
20/Outline/EASE
™ interface.
EASE™ Data
– 3-D polar plots.
SoundTubeSPEC™
– Proprietary
SoundTube speaker placement software
.
Architectural Specifications
The loudspeaker shall consist of a 203
mm (8 in) low-frequency transducer and
a high frequency transducer with a 1”
exit and a frequency-dividing network
installed in a ported enclosure. The low-
frequency voice coil diameter shall be 34
mm (1.36 in).
The performance specifications of a
typical production unit shall be as follows:
Useable frequency response shall extend
from 63 Hz – 22 kHz (-10 dB, no external
equalization). Measured sensitivity (2.83
Volt input, 1 meter) shall be at least 94
dB. The speaker shall have a nominal
Polar Plots
impedance of 8 Ohms and be available for
25/70.7/100 Volt modes with a voice coil/8
Ohm direct. The frequency-dividing net
-
work shall have a crossover frequency of 2.4
kHz with a slope of 12 dB per octave (2nd
order). Rated power capacity shall be at least
125 Watts continuous power (RMS), and
shall conform to EIA-426-B testing. Maxi
-
mum continuous output at 1 meter shall be
115 dB.
The low-frequency transducer shall have a
treated fiber cone and cloth surround.
Installation for the HP890i shall be by 10’
aircraft cable affixed to the speaker chassis via
hook. For seismic and safety redundancy, a
secondary aircraft cable shall be included and
shall attach to the speaker chassis via hook
and cable system. The external wiring shall
be a 4-pin 5 mm Euroblock connector for 8
Ohm or distributed systems and shall accept
from 10 – 22 gauge wire. The system shall be
for indoor and outdoor applications and have
a weather-resistant terminal boot covering all
wire connections.
The enclosure shall be constructed of
injection-molded, glass reinforced ABS. The
grille shall be constructed of iridite-plated,
powder-coated steel for lasting performance
N/A