Helix PF K165.2 – 6.5″ 2-way component speaker system
The HELIX PF K165.2 is a 2-way component set with a 165 mm (6.5″) woofer, a 20 mm (0.75″) tweeter and a two-part Flex-Crossover from the PURE F series, which Audiotec Fischer positions as the entry into the HELIX sound. Thanks to 3 Ohm technology the series is designed to get maximum output from the amplifier and to deliver powerful bass, clear mids and detailed highs.
The woofer uses an injected polypropylene cone with embedded carbon fibers for stiffness and internal damping, which the page credits with improved midrange reproduction, together with a powerful magnet system and a HELIX basket with additional ventilation holes. The ultra-compact coated silk dome tweeter with neodymium magnet delivers airy highs and can be installed with a range of mounting pods, including a bayonet lock system. The look follows the HELIX design with a matte black cone and glossy black Space-Line styling.
Key Features
- Entry into HELIX sound: part of the PURE F series.
- 3 Ohm technology: high efficiency to draw maximum power from the amplifier.
- Low installation depths: fits in almost all vehicles, including modern cars with limited space.
- Carbon-fiber reinforced cone: injected polypropylene with embedded carbon fibers for stiffness and internal damping.
- Ventilated HELIX basket: additional ventilation holes for voice coil cooling and power handling.
- Powerful woofer magnet: controlled, powerful and clear bass.
- Ultra-compact tweeter: 0.75″ coated silk dome with neodymium magnet for airy highs.
- Various mounting pods: OE, flush and angle mount options with bayonet lock; 6 tweeter mounting accessories included.
- Removable tweeter grille: allows mounting behind factory grilles.
- Two-part Flex-Crossover: 12 dB slopes, 2-stage tweeter level adjustment with integrated tweeter protection.
- HELIX design: matte black cone with glossy black Space-Line styling.
Drivers & Construction
- Included drivers: 2 x HELIX PF T20-S tweeters and 2 x HELIX PF W165 woofers.
- Tweeter: 20 mm coated silk dome, neodymium magnet, removable grille.
- Woofer: 165 mm injected polypropylene cone with embedded carbon fibers, powerful magnet system, HELIX basket with extra ventilation holes.
Acoustic Performance
- Power handling: 60 W RMS / 120 W max.
- Impedance: 3 Ω.
- Sensitivity: 92.5 dB @ 2.83 V / 1 m; 88.5 dB @ 1 W / 1 m.
- Frequency response: 55 – 22,000 Hz.
Crossover
- Type: separate, two-part Flex-Crossover for separate tweeter and woofer positions (e.g. tweeter in the A-pillar, woofer in the door).
- Slopes: 12 dB for tweeter and woofer (12/12 dB).
- Tweeter protection: integrated.
- Level adjustment: 2-stage tweeter level adjustment.
- Dimensions: 75.5 x 35.1 x 24 mm.
Installation Notes
- Woofer: outer diameter 165 mm, installation diameter 142 mm, installation depth 61 mm.
- Tweeter (bare): outer / installation diameter 33.1 mm, installation depth 9.8 mm.
- Tweeter OE mount: outer diameter 36 mm, installation diameter 36 mm, installation depth 16.8 mm.
- Tweeter flush mount: outer diameter 42 mm, installation diameter 36 mm, installation depth 11 mm.
- Tweeter angle mount: outer diameter 36 mm.
- Supplied: mounting material and mounting pattern included.
Technical Specifications
| Power RMS / Max. | 60 / 120 Watts |
| Frequency response | 55 Hz – 22,000 Hz |
| Impedance | 3 Ω |
| Sensitivity | 92.5 dB @ 2.83V / 1m 88.5 dB @ 1W / 1m |
| Cone material | TW: Silk dome M: W: Injected polypropylene with embedded carbon fibers |
| Crossover | Separate, 12/12 dB slope and tweeter protection |
| Outer diameter | TW: – 33.1 mm / 1.30″ – OE mount:36 mm / 1.42” – flush mount: 42 mm / 1.65” – angle mount: 36 mm / 1.42” M: – W: 165 mm / 6.50″ |
| Installation diameter | TW: – 33.1 mm / 1.30″ – OE mount: 36 mm / 1.42” – flush mount: 36 mm / 1.42” – angle mount: – M: – W: 142 mm / 5.59″ |
| Installation depth | TW: – 9.8 mm / 0.38″ – OE mount: 16,8 mm / 0.66” – flush mount: 11 mm / 0.43” – angle mount: – M: – W: 61 mm / 2.40″ |
| Dimensions crossovers | 75.5 x 35.1 x 24 mm / 2.97 x 1.38 x 0.95” |
Scope of Delivery
2 x Tweeter HELIX PF T20-S
2 x Woofer HELIX PF W165
2 x Two-part Flex-Crossover
6 x Tweeter mounting accessories
1 x Mounting material
1 x Instruction manual
1 x Mounting pattern
