SEAS W18EX-001

SEAS Millennium
The W18EX-001 is an 18cm (7") cone driver developed for use as a high fidelity bass/midrange woofer. The extremely stiff, yet light magnesium cone and the acoustically transparent basket give tremendous bass precision and midrange detail.
  • Precision cast and surface treated magnesium cone coupled to a natural rubber surround showing no sign of midrange (edge) resonances.
  • Large magnet system for improved sensitivity and transient response. The bumped back plate makes room for extreme coil excursions.
  • Heavy copper rings mounted above and below the T-shaped pole piece, to reduce non linear and modulation distortion and increase overload margin.
  • Copper plating of the top and bottom plates and a solid copper phase plug, which enhance the performance of the copper rings and improve heat conduction away from the pole piece.
  • Gold plated terminals mounted on a glass fiber reinforced plate to reduce contact resistance and improve reliability.
  • Extremely stiff and stable injection molded metal basket to keep the critical components in perfect alignment. Large windows in the basket both above and below the spider to reduce sound reflection, air flow noise and cavity resonance to a minimum.


The T25CF-002 is a 25mm soft dome tweeter which employs a novel Neodymium based magnet system.
It is the tweeter of choice for those who seek extremely precise and realistic sound reproduction combined with a relatively low crossover frequency.
  • A unique HEXADYM magnet system (patent applied for) based on 6 radially magnetized NdFeB magnet blocks.
  • Efficient ventilation and damping of every potentially resonant cavity behind the dome, surround and voice coil.
  • Moderate magnetic stray fields present no problems in AV installations.
  • A generously underhung voice coil (+/- 0.5mm) ensures low distortion even with low crossover frequencies.
  • An optimally shaped and coated fabric dome diaphragm manufactured by SEAS from SONOTEX for excellent performance and consistency.
  • A homogenous, linear surround manufactured by SEAS from SONOMAX, a soft polymer material of high climatic stability.
  • Flexible lead-out wires which ensure a good connection between voice coil and terminals. This arrangement also helps to prevent lead breakage due to the large excursions encountered when low crossover frequencies are used.
  • Low viscosity magnetic fluid which provides excellent cooling while maintaining a low resonance frequency.
  • 6mm injection molded zinc front plate with a very slight loading characteristic which ensures linear frequency response, and a stiff and stable connection to the cabinet.
  • A substantial injection molded rear chamber made from zinc eliminates unwanted chamber wall resonances and conducts heat away from the magnet system.