Helix S 42C.2 – 4″ 2-way component speaker system
The HELIX S 42C.2 is a 2-way component system from the HELIX S-series, consisting of a 100 mm (4″) woofer, a 25 mm (1″) tweeter and a Flex-Crossover. The S-series is designed to deliver rich bass, accurate mids and clear highs using modern design and current technology, combined with a timeless look and easy vehicle integration.
The woofer cone is made of a basalt-fiber-paper compound, which combines very low weight, high stiffness and inner damping. The coated silk dome tweeter sits in a noble aluminum housing and aims for balanced, natural reproduction with the lowest compression effects. The transparent Flex-Crossover uses low-distortion air-core coils and low-loss Audiotec foil capacitors in the tweeter section and can be split into two parts.
Key Features
- Basalt-fiber-paper woofer cone: low weight, high stiffness and inner damping.
- Coated silk dome tweeter: 1″ / 25 mm dome for balanced, natural highs with low compression.
- Aluminum tweeter housing: removable housing for flexible placement.
- Ventilated HELIX basket: extra ventilation holes for voice coil cooling and higher power handling.
- Flex-Crossover: 12/12 dB slopes, bandstop filter, tweeter protection and three-stage tweeter level adjustment.
- Separable crossover: can be split, e.g. tweeter in the A-pillar and woofer in the door.
- Housing-free installation: crossover board can be mounted without its housing using the supplied foam.
- Quality components: low-distortion air-core coils and low-loss Audiotec foil capacitors in the tweeter path.
- Plug & Play wiring: plug connections between components, plus screw terminals for your own speaker cables.
- Shallow installation depths: suitable for tight installation spaces.
Drivers & Construction
- Included drivers: 2 x HELIX S 1T tweeters and 2 x HELIX S 4B woofers.
- Tweeter: 25 mm coated silk dome in a removable aluminum housing.
- Woofer: 100 mm basalt-fiber-paper compound cone, HELIX basket with additional ventilation holes.
Acoustic Performance
- Power handling: 70 W RMS / 140 W max.
- Impedance: 4 Ω.
- Sensitivity: 89 dB @ 1 W / 1 m.
- Frequency response: 75 Hz – 25,000 Hz.
Crossover
- Type: separate Flex-Crossover, separable into two parts.
- Slopes: 12/12 dB with bandstop filter.
- Tweeter protection: integrated.
- Level adjustment: three-stage tweeter level adjustment.
- Components: air-core coils and Audiotec foil capacitors in the tweeter section.
Installation Notes
- Woofer: outer diameter 102 mm, installation diameter 92.3 mm, installation depth 46.5 mm.
- Tweeter: outer diameter 51 mm, installation diameter 45 mm, installation depth 14 mm.
- Crossover dimensions: 112 x 77.5 x 27 mm; board can be installed without housing using supplied foam sheets.
- Connection: Plug & Play connectors plus screw terminals; mounting template included.
Technical Specifications
| Power RMS / max. | 70 / 140 Watts |
| Frequency response | 75 Hz – 25,000 Hz |
| Impedance | 4 Ω |
| Sensitivity 1 W / 1 m | 89 dB |
| Cone material | TW: Coated silk dome M: W: Basalt-fiber-paper compund |
| Crossover | 12/12 dB with bandstop filter, tweeter protection and tweeter level adjustment |
| Outer diameter | TW: 51 mm / 2.0″ M: – W: 102 mm / 4.01″ |
| Installation diameter | TW: 45 mm / 1.77″ M: – W: 92.3 mm / 3.63″ |
| Installation depth | TW: 14 mm / 0.55″ M: – W: 46.5 mm / 1.83″ |
| Dimensions crossover | 112 x 77.5 x 27 mm / 4.41 x 3.05 x 1.06″ |
Scope of Delivery
2 x Tweeter HELIX S 1T incl. mounting material
2 x Woofer HELIX S 4B
2 x Flex-Crossover
4 x Foam sheet
1 x Mounting material
1 x Instruction manual
1 x Mounting pattern
