Helix F 42C – 4″ 2-way component speaker system
The HELIX F 42C is a 2-way component system from the HELIX F loudspeaker series, consisting of a 100 mm (4″) woofer, a 20 mm (0.75″) tweeter and a two-part Flex-Crossover. The series combines proven components with new materials to deliver rich bass, accurate mids and detailed highs, and it is designed for easy integration into the vehicle.
The woofer uses a novel, low-resonant cone made of injected polypropylene with embedded carbon fibers, a basket with additional ventilation holes and a solid rubber magnet protection ring with HELIX logo. The silk dome tweeter with neodymium magnet provides crisp, clear treble. Shallow mounting depths and the two-part crossover give more freedom in wiring and placement, which is ideal when tweeters and woofers are installed in different positions such as door and A-pillar.
Key Features
- Carbon-fiber reinforced cone: low-resonant injected polypropylene cone with embedded carbon fibers.
- Silk dome tweeter: 0.75″ / 20 mm dome with neodymium magnet for crisp, clear highs.
- Ventilated basket: additional ventilation holes for voice coil cooling and higher power handling.
- Rubber magnet protection ring: solid ring with HELIX logo.
- Two-part Flex-Crossover: 6/12 dB slopes with tweeter protection.
- Separate driver placement: well suited to tweeter in the A-pillar and woofer in the door.
- Shallow mounting depths: 45 mm woofer, 17.3 mm tweeter.
- Understated look: matte black cone with glossy black HELIX logo.
Drivers & Construction
- Included drivers: 2 x HELIX F 1T tweeters (with mounting material) and 2 x HELIX F 4B woofers.
- Tweeter: 20 mm silk dome, neodymium magnet.
- Woofer: 100 mm injected polypropylene cone with embedded carbon fibers, ventilated basket, rubber magnet protection ring.
Acoustic Performance
- Power handling: 40 W RMS / 80 W max.
- Impedance: 3 Ω.
- Sensitivity: 89 dB @ 1 W / 1 m.
- Frequency response: 100 Hz – 22,000 Hz.
Crossover
- Type: separate, two-part Flex-Crossover (tweeter and woofer sections).
- Slopes: 6/12 dB.
- Tweeter protection: integrated.
- Dimensions: tweeter section 51.5 x 27.5 x 20.5 mm; woofer section 57 x 27.5 x 23.5 mm.
Installation Notes
- Woofer: outer diameter 102.4 mm, installation diameter 93 mm, installation depth 45 mm.
- Tweeter: outer diameter 52.6 mm, installation diameter 45 mm, installation depth 17.3 mm.
- Supplied: mounting material and mounting pattern included.
Technical Specifications
| Power RMS / max. | 40 / 80 Watts |
| Frequency response | 100 Hz – 22,000 Hz |
| Impedance | 3 Ω |
| Sensitivity 1 W / 1 m | 89 dB |
| Cone material | TW: Silk dome M: W: Injected polypropylene with embedded carbon fibers |
| Crossover | Separate, 6/12 dB slope and tweeter protection |
| Outer diameter | TW: 52.6 mm / 2.07″ M: – W: 102.4 mm / 4.03″ |
| Installation diameter | TW: 45 mm / 1.77″ M: – W: 93 mm / 3.66″ |
| Installation depth | TW: 17.3 mm / 0.68″ M: – W: 45 mm / 1.77″ |
| Dimensions crossover | Tweeter: 51.5 x 27.5 x 20.5 mm / 2.03 x 1.08 x 0.81″ Woofer: 57 x 27.5 x 23.5 mm / 2.24 x 1.08 x 0.93″ |
Scope of Delivery
2 x Tweeter HELIX F 1T incl. mounting material
2 x Woofer HELIX F 4B
2 x Two-part Flex-Crossover
1 x Mounting material
1 x Instruction manual
1 x Mounting pattern
