Swans (HiVi-Research) F-8 Kevlar/Paper Bass

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Swans (Hifi-Research) F-8 Woofer

Key Features:
  • Light and extremely rigid cone made from Kevlar/paper composite;
  • specially made high loss rubber surround;
  • shielded double magnet motor structure;
  • high power handling aluminum former voice coil;
  • flat linear spider;
  • high-density aluminum die-cast basket.
  • An accurate and uncompressed sound performance at realistic loudness levels represents the ideology implemented in this driver. The design of F8 has been optimized for balanced and dynamic low bass reproduction in compact or medium vented systems. Midrange clarity and tonal balance is remarkable.
F8 utilizes a newly developed matrix of Kevlar and paper fibers. As a result, the cone weighs less, is more rigid and has an improved dampening factor over conventional Kevlar materials. The back of the cone is hand coated with a special dampening compound to further maximize performance stability and control of structural resonances. The driver utilizes a vented aluminum voice coil former and flat air transparent spider to avoid air compression and ensure maximum power handling.

The massive aluminum die-cast basket has been developed to minimize parasitic structural resonances. A shielded magnet structure allows the F8 to be easily incorporated into audio/video applications. F8 has a remarkably smooth frequency response (within +/- 1.7 dB tolerance in 70 - 3000 Hz range, measured in IEC baffle).

Recommended crossover frequency for two-way system design is 1.8-2.2 kHz.

Short data

Usage as Bass-Midrange
Power Handling 60 Watt
Impedance 8 Ohm
Frequency from 31.9 Hz
Max. Frequency 3 kHz
Sound pressure 88 dB


Overall dimensions 239 mm
Baffle cutout 187 mm
Depth (Total) 106 mm
Frame Material Aluminium diecast
Membrane Type Cone
Membrane Surround Rubber
Membrane Material Kevlar / Paper
Voice coil Ø 35 mm
Voice coil height 17.5 mm
Voice coil material Kapton
Air gap height 7.5 mm


Resonance fs fs: 37 Hz
Mechanical Q Qms: 4.71
Electrical Q Qes: 0.44
Total Q Qts: 0.40
Equivalent Air-Volumen Vas: 38.8 Liter
DC-Resistance Re: 6.5 Ohm
Coil Inductance Le: 0.86 mH
Mech. Compliance Cms: 0.5937 mm/N
Moving Mass Mms: 30.5 g
Max. Excursion +/- Xmax: 5 mm
BL Product Bl: 10.3 N/A
Membrane Area Sd: 214 cm²
Sound pressure dB: 89 SPL



Technical Dimensions

PDF-Product information

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