We take the words research and development to heart - not just posting them on the department door, but following through with action and results. At Rainbow we’re not just dabbling in what we do - we challenge the fundamentals to improve the outcome.

Fast, controlled and peppy. These are the attributes of the new power system and the logical result of a powerful woofer coupled with a super-fast volume tweeter. This combination makes the CS 275.27 Power the top model in its class.

For unlimited music fun, impressive bass and a remarkable dynamic range without compromise.

Up to the threshold of pain and far beyond, the CS 275.27 Power offers perfect performance. It plays deeply, accurately, and with fascinating precision and liveliness. Controlled bass attacks are without inertia, explosive and with extreme power.

• 6.9 inch Woofer
• 27mm Silk VOF Tweeter 
• max. 250 Watt

The Tweeter

• Tweeter dome made of stamped, ultraviolet-resistant natural fiber-silk mixture
• Fabric surround for controlled cone motion
• Tweeter dome sound-coated by hand
• Felt pad underneath tweeter dome to prevent turbulence
• Vented voice coil former with flexible stainless steel lead wires
• Connected acoustic volume for low resonance frequency and extreme linear frequency response
• 8-holed backplate to connect tweeter to defined acoustic volume
• High efficiency neodymium magnet with reversible magnet energy up to 175 degrees celsius
• Ferrofluid free magnet system for extremely fast and precise pulse response
• Professional and vibration-free 4-point fixing
• Distortion-free sound reproduction with unbe...

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We take the words research and development to heart - not just posting them on the department door, but following through with action and results. At Rainbow we’re not just dabbling in what we do - we challenge the fundamentals to improve the outcome.

Fast, controlled and peppy. These are the attributes of the new power system and the logical result of a powerful woofer coupled with a super-fast volume tweeter. This combination makes the CS 275.27 Power the top model in its class.

For unlimited music fun, impressive bass and a remarkable dynamic range without compromise.

Up to the threshold of pain and far beyond, the CS 275.27 Power offers perfect performance. It plays deeply, accurately, and with fascinating precision and liveliness. Controlled bass attacks are without inertia, explosive and with extreme power.

• 6.9 inch Woofer
• 27mm Silk VOF Tweeter 
• max. 250 Watt

The Tweeter

• Tweeter dome made of stamped, ultraviolet-resistant natural fiber-silk mixture
• Fabric surround for controlled cone motion
• Tweeter dome sound-coated by hand
• Felt pad underneath tweeter dome to prevent turbulence
• Vented voice coil former with flexible stainless steel lead wires
• Connected acoustic volume for low resonance frequency and extreme linear frequency response
• 8-holed backplate to connect tweeter to defined acoustic volume
• High efficiency neodymium magnet with reversible magnet energy up to 175 degrees celsius
• Ferrofluid free magnet system for extremely fast and precise pulse response
• Professional and vibration-free 4-point fixing
• Distortion-free sound reproduction with unbelievably low resonance frequency and ultra linear frequency response of 1.200 – 35.000 Hz

The Power controller

• Uncompromising frequency range is paramount for sound quality. The showcase controller with hand-selected components handles the real kick-bass punch. Distortion-free copper transformer core coils and super-fast MKP foil capacitors guarantee sound with maximum neutrality, depth, and fast mid-basses. The 4-level attenuation in combination with the HALO-Systems provides for individual adjustment of tweeter level and protects the tweeter against excessive power output.

The Woofer

• Aluminum diecast basket with extreme stiffness for resonance-free operation
• Palladium-plated screw terminals for high quality cables with large diameter
• Butyl rubber surround for controlled cone motion and minimal distortion
• Authentic sound reproduction despite the use of aluminum with an aluminum compound cone on a polymer cellulose base
• Innovative concave dust cap for best frequency response
• Machined aluminum phase plug for phase correction around the crossover frequencies and additional cooling for magnet motor
• High temperature 40 mm voice coil former of black kapton for minimal current loss and maximum excursion
• Vented voice coil duroplastic baked with high-temperature glue
• Ventilated spider to prevent air compression
• Extremely flexible surface-refined lead wires fixed via glue-points to guarantee resonanceand
• Vented, distortion-fee double-magnet-system for better magnet motor cooling and dustcap ventilation
• Symmetrical pole piece for optimized magnet field symmetry
• Short cut ring made of copper to reduce distortion
• Optimized ferror-strontium double magnet for high sensitivity with additional cooling via 8 mm chromium-plated backplate

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