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Technical Data
SoundTube Entertainment strives to
provide complete and effective technical
information and data to dealers, engineers
and designers. All data are available
from SoundTube Entertainment or at
www.soundtube.com.
Techn ical data and downloads include:
EASE™ data – 3D polar plots.
SoundTubeSPEC™ – Proprietary
SoundTube speaker placement software.
Tech Sheets – Technical information and
architectural specs for system engineers.
Da
Data Acquisition
All performance data acquired at
SoundTube’s Technical Measurement Cen-
ter (TMC) are analyzed using standardized
measurement techniques, including Mea-
sured Length Sequence (MLS) and Time
Delay Spectrometry (TDS). Performance,
development, and data acquisition tools
include: Gold Line TEF 20 Suite, CLIO, LMS,
LEAP, and proprietary modeling software.
Da
Data for Other SoundTube
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.
A
rchitectural Specifications
The loudspeaker shall consist of a 130
mm (5.25 in) low-frequency transducer
and a 25 mm (1.0 in) high-frequency trans-
ducer with a frequency-dividing network
installed in an infinite baffle sealed enclo-
sure (Bessel alignment). The low-frequency
voice coil diameter shall be 25 mm (1.0 in).
Performance specifications of a typical
production unit shall be as follows: Usable
frequency response shall extend from
65 Hz – 20 kHz. The loudspeaker shall be
available in separate low-impedance and
high-impedance models. The RS55i-T32
unit shall be equipped with a transformer
for use in either 70.7 Volt or 100 Volt distrib-
uted-line sound systems with taps select-
able via a rotary switch. Taps shall be
nominally 4 W @ 70.7 V (8 W @ 100 V), 8
W @ 70.7 V (16 W @ 100 V), 16 W @ 70.7 V
(32 W @ 100 V), 32 W @ 70.7 V (tap position
not used @ 100 V). The frequency-dividing
network shall have a crossover frequency
of 3.1 kHz. Rated power capacity of the
Frequency Response
(unequalized)
Phase 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
RS55i
RS55i
Open-Ceiling Speaker
Technical Information for System Engineers