CM-4
VERSATILE INSTALLATION TOOLS
technical data
Characteristics
ConceptPassive 2-way ceiling-mounted loudspeaker
Cabinet principleBass reflex
Power handling RMS30 W (low impedance), 15 W max. (high impedance 100 V)
Power handling program60 W (low impedance)
Power handling peak120 W (low impedance)
Power tap 1 at 100 V15 W
Power tap 2 at 100 V12.5 W
Power tap 3 at 100 V10 W
Power tap 4 at 100 V7.5 W
Nominal impedance18 Ohms (low impedance)
Nominal impedance Power tap 1 at 100 V1670 Ohms
Nominal impedance Power tap 2 at 100 V1800 Ohms
Nominal impedance Power tap 3 at 100 V11000 Ohms
Nominal impedance Power tap 4 at 100 V11300 Ohms
Max. SPL average2102 dB (low impedance), 99 dB (15 W power tap at 100 V)
Max. SPL peak3107 dB (low impedance), 103 dB (15 W power tap at 100 V)
Sensitivity 1 W/1 m485 dB
Crossover frequency3.6 kHz
Frequency range -6 dB81 Hz - 20 kHz
Frequency range -10 dB64 Hz - 20 kHz
Dispersion angle -6 dB (horizontal x vertical)145°
Index
Index 1)According to EN 60268-5 (minimum value not less than 80% of nominal value)
Index 2)1 m, 10 % THD @ 100 Hz - 20 kHz, (EN 60268-21), half space
Index 3)1 m, 10 % THD @ 4.5 kHz, half space
Index 4)100 Hz - 20 kHz, half space
Certifications
IP-Protection class (EN 60529)not specified (installation only in dry indoor areas)
Flame resistance (IEC 60695-11-5:2016)certified (SGS)
Components
Low frequency1 x 4" polypropylene loudspeaker with ferrite magnet and 1 x 1" voice coil
High frequency0.75" aluminum dome tweeter with neodymium magnet and 0.75"-voice coil with ferrofluid
CrossoverHigh pass: 18 dB/oct., Low pass: 12 dB/oct.
HornIntegrated sound guides
Connections
Input1 x 2-pin Euroblock plug
Output/parallel output1 x 2-pin Euroblock plug, parallel connecion
Amping/Presets
Lab.gruppenLUCIA Series
Amping/Filter Sheets
Lab.GruppenIPX Serie, LUCIA Series
othersBiamp Tesira, BSS, Lab.Gruppen Lake, Linea Research, Marani, Powersoft, QSC Q-SYS, Ram Audio, Symetrix (Filter specifications in tabular form for frequency response equalization, without limiter specifications)
Mechanical data
Cabinet features/rigging3 x mounting clamps accessible from the front with max. 40 mm clamping range, 2 x brackets for steel cables/chains or for cable fastening
Cabinet materialsteel
Cabinet surfacesmooth
Colorblack, white (2 x front grilles included)
Front grilleRimless design with magnetic mounting
Accessories included2 x cover plate with curved cable entries or with hole for PG screw connection, 2 x front grille (black and white), 1 x cut-out template
Dimensions: diameter x total depth (installation depth), metric22.4 x 17.7 (17.1) cm
Dimensions: diameter x total depth (installation depth), imperial8-13/16 x 6-31/32 (6-23/32) inch
Cut-out diameter, metric19.2 cm (cut-out template included)
Cut-out diameter, imperial7-9/16 inch (cut-out template included)
Weight, metric2.70 kg
Weight, imperial6.0 lbs
The SI SERIES CM-4 is an exceptional coaxial ceiling speaker, designed to provide premium audio performance in both residential and commercial spaces. Featuring a 4" polypropylene woofer/midrange transducer, it ensures clear, balanced sound across a wide frequency range. Complementing this, the 0.75" aluminium dome tweeter delivers crisp, detailed high frequencies, resulting in a rich, full-bodied listening experience. The CM-4 is engineered for versatility, offering easy integration into any ceiling installation while maintaining a sleek, unobtrusive appearance. Perfect for those seeking high-quality sound without compromise, this speaker brings both aesthetic and acoustic excellence to any environment.