Helix CFMK25 AUD.4 – FlexMount25 tweeter adaptor ring for Audi
FlexMount is the HELIX mounting system based on specially developed, vehicle-specific adaptor rings. The CFMK25 AUD.4 turns a universal 1″ / 25 mm HELIX COMPOSE tweeter with FlexMount25 technology into a car-specific tweeter for installation in the original mounting position. Thanks to its two-part design, the included FlexMount25-to-FlexMount20 adaptor also lets you fit 0.75″ / 20 mm HELIX COMPOSE tweeters.
Key Features
- Vehicle-specific design: adaptor ring made for the original tweeter mounting location in Audi vehicles
- Two-part design: for 1″ / 25 mm (FlexMount25) and 0.75″ / 20 mm (FlexMount20) HELIX COMPOSE tweeters
- Snap lock: easy installation and secure fixation of the tweeter in the ring
- Acoustically optimised: professional integration in the factory position
- Pair: two FlexMount25 rings plus two FlexMount25-to-FlexMount20 rings included
Compatibility
- Vehicles: Various Audi vehicles with factory installed tweeter
- Speakers: HELIX i7: Ci7 T20FM-SC; HELIX i5: Ci5 T25FM-CA; HELIX i3: Ci3 T20FM-TI, Ci3 K100.2FM-S3, Ci3 K130.2-S3, Ci3 K165.2FM-S3, Ci3 K165.2FM-S2, Ci3 K200.2FM-S3, Ci3 K200.2FM-S2; HELIX BASIC: CB T20FM-S, CB K100.2-S3, CB K130.2-S3, CB K165.2-S3
Installation Notes
- For 20 mm tweeters, use the included FlexMount25-to-FlexMount20 adaptor ring.
- Check the exact car model in the HELIX FlexMount Finder before ordering.
Scope of Delivery
2 x FlexMount25 adaptor ring
2 x FlexMount25 to FlexMount20 adaptor ring














