Specifications: CM890i
System Type
Frequency Response (- 3 dB)
1
Low Frequency (-10 dB)
1
Max. Program Power
Max. Continuous Power RMS
2
Max. UL program power
3
Max. SPL dB @ 1 M
Sensitivity dB @ 1W/1M
4
Impedance (nominal)
Coverage Angle (-6 dB @ 2 kHz)
Coverage Angle (-6 dB @ 8 kHz)
Directivity Factor (Q)
Directivity Index (DI)
Tap Selector
Transformer Taps
Transducers
Low Frequency Driver
High Frequency Driver
Low Frequency Voice Coil
Crossover Frequency
Network Type
Low Pass
High Pass
Enclosure Material
Motor-Board
Grille
Inputs
Colors
Backcan Diameter
Backcan Height
Visible Diameter
Visible Height
Weight
Shipping Weight
Accessories
Included
Optional
Packaging
8” Coax, compression tweeter w/ 1” exit, in-ceiling, ported (66
Watt transformer for 25/70.7/100 Volt or voice coil / 8 Ohm direct)
77 Hz - 20 kHz
63 Hz - 20 kHz
250 Watts
125 Watts
65 Watts
116 dB
95 dB
8 Ohm
100º
110º
5.35 (Averaged 100 Hz - 10 kHz); 7.89 @ 2 kHz
6.49 dB (Averaged 100 Hz - 10 kHz); 8.97 dB @ 2 kHz
6-Position rotary switch with voice coil direct (8 Ohm)
1 x 203 mm (8 in) Treated fiber cone, cloth surround
1 Compression driver with waveguide and a 25.4 mm (1”) exit
34 mm (1.36 in)
2.4 kHz
12 dB per octave, 2nd order
12 dB per octave, 2nd order
Drawn aluminum backcan with ABS baffle
Cast aluminum
Iridite-plated steel with powder-coat finish
4 Pin, 5 mm Euroblock for individual or daisy chain connection
Black or white
296.7 mm / 11.68 in
201.7 mm / 7.94 in
375.0 mm / 14.76 in
27.5 mm / 1.08 in
6.5 kG / 14.3 lbs
N/A
Tile bridge, Euroblock connector, back cover plate & installation aid
Pre-Construction Bracket (AC-CM8-PCB),
Junction Box (AC-CM-JBOX)
2 per box
© 2006 SoundTube Entertainment. All rights reserved. PN TS-CM590 REV 04.04.06
Preliminary Technical Information
The information in this document reflects
preliminary data. Items including polar
plots, frequency, phase and impedance
response graphs will be added when final
data are available.
Key Features
• BroadBeamHP
®
waveguide technology
delivers a consistent dispersion pattern
for maximum coverage area per speaker
(up to 10 kHz, EASE
™
documented).
• 66 Watt transformer and high output
(116 dB) for the sound reinforcement and
PA markets.
• One 203 mm (8.0 in) treated fiber driver
and one compression driver with a 25.4 mm
(1 in) exit mounted to a proprietary cast-
aluminum M8
™
baffle and heat sink.
• 95 dB Average sensitivity offers high-
output capabilities and reduced amplifi-
cation costs.
• Separate tool-free magnetic grille &
bezel assembly for ease of install and
in-field painting.
• Iridite-plated, steel grille with protective
powder-coated finish for lasting durability.
• Rapid-installation blind mount fixed
wing mounting mechanism with con-
stant tension design affixes to ceiling
thickness tolerances ranging from 6.4
mm (0.25 in) to 42.9 mm (1.69 in).
• UL 2043 approval pending.
• Included accessories: Tile bridge,
Euroblock connector & paint mask
/installation aid.
• Optional accessories: Pre-Construc-
tion Bracket
Description
The CM890i is a premium 8.0” 2-way,
in-ceiling, high-efficiency, high-SPL
loudspeaker for distributed or 8 Ohm
applications. The CM890i incorporates
a dedicated 8.0” treated fiber driver and
high-power compression transducer with
a BroadBeamHP
®
waveguide to deliver a
consistent dispersion pattern and superb
intelligibility for the foreground music,
sound reinforcement and PA markets. The
CM890i also incorporates a 66 Watt trans-
former with a 6-position tap switch and
voice coil/8 Ohm direct position. Mount-
ing hardware and tile-bridge are included
and feature a fast and secure constant-ten-
sion fixed wing mounting system.
CM890i
In-Ceiling Speaker
Preliminary Technical Information for System Engineers
Tile bridge included
1
Frequency response is measured in half space.
2
Continuous power rating, EIA-426-B test.
3
UL testing specifies band-limited pink noise over the indicated frequency spectrum.
4
2.83 Volts at a distance of 1 meter.
SoundTube continually develops new product innovations and improvements. Updates to existing
products without prior notice are an example of SoundTube’s drive for constant improvement.
70.7 V Output
100 V Output
25 V Output
66 W 113 dB
66 W 113 dB
5 W 102 dB
35 W 110.5 dB
35 W 110.5 dB
2.5 W 99 dB
19 W 108 dB
19 W 108 dB
1.25 W 96 dB
10 W 105 dB
10 W 105 dB
0.75 W 94 dB
5 W 102 dB
