HK Audio CM-4 60 Watts Ceiling Speaker Rear Chamber 70/100V 4 Taps 8 ohm – 4″
The SI SERIES CM-4 is a high-quality coaxial ceiling speaker with 4 polypropylene woofer/midrange transducer and 0.75 aluminium dome tweeter. Its discreet, customisable appearance with magnetically attached white or black front grille makes it the perfect
The SI SERIES CM-4 is a high-quality coaxial ceiling speaker with 4 polypropylene woofer/midrange transducer and 0.75 aluminium dome tweeter. Its discreet, customisable appearance with magnetically attached white or black front grille makes it the perfect addition to the SI SERIES toolbox.
A specially developed, multi-stiffened steel back can guarantees complete freedom from resonance. A front-operated 100/70 V transformer with bypass option and detailed equalisation via DSP ensure the highest possible sound quality.
Subwoofer models such as the SI SERIES S210 V or FINEO FO S112 (F) are available to support the bass range.
Specifications
| Characteristics | |
| Concept | Ceiling Mounted Speaker |
| Cabinet principle | Bassreflex |
| Power handling RMS | 30 W (low-Z), 15 W max. (high-Z 100 V) |
| Power handling program | 60 W (low-Z) |
| Power handling peak | 120 W (low-Z) |
| Power handling 100 V (5 taps) | 15 W, 12.5 W, 10 W, 7.5 W |
| Power handling 70 V (5 taps) | 7.5 W, 6.3 W, 5 W, 3.8 W |
| Nominal impedance (low-Z) | 8 ohms |
| Nominal impedance (high-Z power taps) | 670 ohms, 800 ohms, 1000 ohms, 1300 ohms |
| Max. SPL average (low-Z) | 102 dB |
| Max. SPL average (high-Z, 15 W tap) | 99 dB |
| Max. SPL peak (low-Z) | 107 dB |
| Max. SPL peak (high-Z, 15 W tap) | 103 dB |
| Sensitivity 1 W/1 m (low-Z) | 85 dB |
| Crossover frequency | 3.6 kHz |
| Frequency range -6 dB | 81 Hz – 20 kHz |
| Frequency range -10 dB | 64 Hz – 20 kHz |
| Dispersion angle -6 dB (circular) | 145 |
| Certifications | |
| Flame retarding ABS (IEC 60695-11-10/-20) class V-0/5VB | certified |
| Ball impact resistance (DIN 18032-3) | not specified |
| IP protection class (EN 60529) | not specified (indoor use only) |
| Components | |
| Low-/mid frequency | 4″ polypropylene speaker with ferrite magnet and 1″ voice coil |
| High frequency | 0.75″ aluminium dome tweeter with neodymium magnet and 0.75″ voice coil with ferrofluid |
| Crossover | High pass: 18 dB/octave, low pass: 12 dB/octave |
| Horn | Integrated wave guides |
| Connections | |
| Input | 2-pole Euroblock connector |
| Output/parallel output | 2-pole Euroblock connector, wired in parallel |
| Amping/Filter Sheets | |
| Filter specifications in tabular form for frequency response equalization Without limiter specifications |
Biamp Tesira BSS Lab.gruppen Lake Lab.gruppen IPD/IPX LEA Professional Linea Research Marani Powersoft QSC Q-SYS Ram Audio Symetrix |
| Mechanical data | |
| Mounting clamps | 3 x front-accessible mounting clamps with max. 40 mm (0.4 inch) grip range |
| Saftey features | 2 x bracket for safety wires/chains or cable fastening |
| Cover plates | 2 x cover plate included, with curved cable entries or with hole for PG gland |
| Rotary switch for power taps | 1 x front-accessible rotary switch for bypassing the transformer for low- impedance (8 ohms) operation or for power taps at 100/70 V |
| Cabinet material | Metal back-can with low-resonance, partially curved shape |
| Color | Black and white front grille included |
| Front grille | Rimless design with magnetic attachment |
| Optional accessories | C-ring and tile bridges |
| Dimensions: diameter x total depth (installation depth) | 224 x 177 (171) mm 8.82 x 6.97 (6.73) inch |
| Cut-out diameter | 192 mm (template included) |
| Weight | 2.70 kg 5.95 lbs |
| According to EN 60268-5 (minimum value not less than 80% of nominal value) | |
| 1 m, 10 % THD @ 100 Hz – 10 kHz, (EN 60268-21), half space | |
| 1 m, 10 % THD @ 4.5 kHz, half space | |
| 100 Hz – 20 kHz, half space | |
| 100 Hz – 10 kHz |
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