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designers. All data are available from
SoundTube Entertainment or at
www.soundtube.com.
Technical data and downloads include:
Tech Sheets – Technical information and
architectural specs for system engineers.
Da
Da
ta Acquisition
ta Acquisition
All performance data acquired at
SoundTube’s Technical Measurement Center
(TMC) are analyzed using standardized mea-
surement techniques, including Measured
Length Sequence (MLS) and Time Delay
Spectrometry (TDS). Performance, develop-
ment, and data acquisition tools include:
Gold Line TEF 20 Suite, CLIO, LMS, LEAP,
and proprietary modeling software.
Da
Da
ta for Other SoundTube
ta for Other SoundTube
Products
Products
Also available: Sales & installation
information for all SoundTube speaker
systems, including open ceiling, in-ceil-
ing, surface-mount, in-ground and sound-
focusing speakers.
Architectural Specifications
rchitectural Specifications
The loudspeaker shall consist of one
203 mm (8.0 in) concentric coaxial coated
fiber driver, 25 mm (1.0 in) compression
driver with a 50 mm (2.0 in) titanium dia-
phragm, and a frequency-dividing network
installed in a dual-ported enclosure. The
low-frequency voice coil diameter shall be
50 mm (2.0 in).
Performance specifications of a typical
production unit shall be as follows: Usable
frequency response shall extend from
52 Hz – 17 kHz. The loudspeaker shall be
available with a switchable transformer/8
Ohm input, and shall be equipped with
corrosion-resistant gold-plated barrier
strips for both impedance modes. Taps
shall be nominally 8 W @ 70.7 V (16 W @
100 V), 16 W @ 70.7 V (32 W @ 100 V),
32 W @ 70.7 V (64 W @ 100 V) and 64 W
@ 70.7 V (tap position not used @ 100 V).
The frequency-dividing network shall have
a crossover frequency of 1.8 kHz. Rated
power capacity of the components and net-
work shall be at least 125 Watts continuous
RMS power.
The enclosure shall be constructed of a
glass-fiber reinforced composite for maxi-
mum performance. The grille shall be con-
structed of UV-resistant ABS plastic material.
Frequency Response
Frequency Response
(unequalized)
Phase Response
Phase Response
Impedance Response
Impedance Response
Frequency Response on-axis in full space (4π).
SPL, 1W, 1M (dB)
Frequency (Hz)
Technical data, EASE
™
plots, SoundTubeSPEC
™
software & product downloads available at www.soundtube.com
HP8i
HP8i
High-Power Speaker
Technical Information for System Engineers