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Description
HK Audio CM-8 Ceiling Speaker Rear Chamber 70/100V 4 Taps 8 ohm - 8"The SI SERIES CM 8 is a high quality coaxial in ceiling speaker with 8 polypropylene woofer midrange transducer and 1 aluminum 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
The SI SERIES CM-8 is a high-quality coaxial in-ceiling speaker with 8“ polypropylene woofer/midrange transducer and 1“ aluminum 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 | 70 W (low-Z), 30 W max. (high-Z 100 V) |
| Power handling program | 140 W (low-Z) |
| Power handling peak | 280 W (low-Z) |
| Power handling 100 V (5 taps) | 30 W, 20 W, 10 W, 5 W |
| Power handling 70 V (5 taps) | 15 W, 10 W, 5 W, 2.5 W |
| Nominal impedance (low-Z) ¹ | 8 ohms |
| Nominal impedance (high-Z power taps) ¹ | 300 ohms, 500 ohms, 1000 ohms, 2000 ohms |
| Max. SPL average (low-Z) ² | 109 dB |
| Max. SPL average (high-Z, 30 W tap) ² | 107 dB |
| Max. SPL peak (low-Z) ³ | 115 dB |
| Max. SPL peak (high-Z, 30 W tap)3) | 112 dB |
| Sensitivity 1 W/1 m ⁴ | 90 dB |
| Crossover frequency | 2.2 kHz |
| Frequency range -6 dB | 73 Hz - 20 kHz |
| Frequency range -10 dB | 60 Hz - 20 kHz |
| Dispersion angle -6 dB (circular) ⁵ | 135° |
| 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 | 8" polypropylene speaker with ferrite magnet and 1.25" voice coil |
| High frequency | 1" aluminium dome tweeter with neodymium magnet and 1" 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 points | 4 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) | 313 x 180 (173) mm 12.32 x 7.09 (6.81) inch |
| Cut-out diameter | 280 mm (template included) |
| Weight | 5.35 kg 11.79 lbs |
| ¹ According to EN 60268-5 (minimum value not less than 80% of nominal value) | |
| ² 1 m, 10 % THD @ 100 Hz - 10 kHz, (EN 60268-21), half space | |
| ³ 1 m, 10 % THD @ 4 kHz, half space | |
| ⁴ 100 Hz - 20 kHz, half space | |
| ⁵ 100 Hz - 10 kHz |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1682 reviews
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Product Reviews
★★★★★ 5
Stylish, comfortable, breathable, and fast drying! Perfect for active wear!
Color: Black, Size: 13-14 Years, Color: Black, Size: 13-14 Years
This tennis dress/set is perfect for my daughter. She can use it for tennis, golf, or just as an addition to her summer wardrobe. It fits true to size (though it does run a bit long), and it looks great on. The fabric is very soft and stretchy (a polyester and spandex blend). It’s also very breathable and quick drying, and I love that it’s machine washable. I also like that the shorts are not sewn in (instead it’s a two piece outfit). The shorts also have pockets large enough to fit tennis balls on both hips. The neckline is high and modest, and the skirt is loose and flowy. The dress and shorts are well made and durable too. Because it’s so lightweight, it’s great to wear even in hot and humid weather. The pullover design makes it easy to put on and take off. This dress is a great addition to any active girl’s wardrobe, and it’s a great value too. And it’s available in sizes from 7/8 to 13/14 and several different colors too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
★★★★★ 4
Shorts are separate
Color: Pink, Size: 11-12 Years
This athletic dress is really cute and good quality. It fits true to size. I actually sized up because sometimes athletic dresses run more form fitting, but this one isn’t tight at all. The shorts are separate (I originally thought they were built in), and they do have a pocket, which is a nice bonus. The price is fair for what you get. There’s plenty of room for my daughter to grow into it and hopefully wear it for a few years. Overall, it’s comfortable and a great find.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
★★★★★ 5
Lightweight Dress Great for a Hot Day!
Size: 9-10 Years, Color: Purple
This is a cute dress; my daughter loved it. The material is light weight and breathable it is perfect for a hot day or for doing athletic activities. The color is bright and the material quality is very good. It is true to size, maybe a little tight so size up if needed. It is a great dress.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2025
★★★★★ 5
Comfortable
Size: 9-10 Years, Color: Pink
So cute, looks great on 7 year old and she said it’s comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
★★★★★ 5
Perfect athletic set for girls!
Size: 11-12 Years, Color: Pink, Size: 11-12 Years, Color: Pink
This outfit was adorable on my daughter! Color was bright and beautiful as advertised and the fit is very true to size! Perfect athleisure set for kids!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 5, 2025
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