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 Acqui sition
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). Perform ance, 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.
Architect ural Spe cificatio ns
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 frequenc y-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 Resp onse
Frequency Response
(unequalized)
Phase Respons e
Phase Response
Impedance Resp onse
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