Excel Coaxial Drivers

SEAS designed and manufactured its first coaxial drivers more than 20 years ago.
Early on, R&D engineer Bjørn Børja recognized the unique possibilities created by the new neodymium magnet technologies; allowing us to design a high performance tweeter in a very compact package. SEAS has continuously refined coaxial driver technology over the years, and today remains the only loudspeaker driver manufacturer to make this unique technology available to the OEM and hobbyist markets.

Never standing still, the R&D lab recently decided to see what could be accomplished by applying our state of the art Excel technology to a coaxial drive unit. The answer can be found in our new Excel C16 N001/F , and the results are amazing.

Item  16cm coax  VC diam  Fo  VAS QTS Features
E0051-04/06  C16N001/F  39 mm  37 Hz  15 0.49 Magnesium cone, double chamber tweeter
 Item 18cm coax VC diam  Fo  VAS QTS Features
E0060-08/06 C18EN002/A 39 mm 85 Hz 5 0.54 Dedicated midrange, aluminium/magnesium cone and tweeter dome

E0060-08/06 C18EN002/A

This driver features a low-mass, surface-treated aluminium/magnesium alloy cone which behaves like a piston throughout the audible frequency range, without any sign of midrange resonances.

The coaxially mounted aluminium/magnesium alloy dome tweeter has a low resonance frequency, and integrates with the cone driver to form a point source.

The cone profile has been carefully designed to optimally load the tweeter’s radiation. A completely new rubber surround reduces resonances and prevents surround break up in the midrange band. The surround’s small inverted roll, combined with a profile that follows the shape of the cone, results in almost total elimination of diffraction effects on the tweeter’s output.

The powerful neodymium magnet system, with its small profile and optimal shape, results in high midrange sensitivity with minimal back wave reflections. Heavy copper rings mounted above and below the T-shaped pole piece reduce nonlinear and modulation distortion and increase overload margin. The crown-shaped copper tweeter support ring eliminates any resonance coming from the cavity between the tweeter body and midrange voice coil former.

All of these features work together to provide a smooth and well behaved off-axis response throughout the entire operating range.

e seas Excel loudspeaker coaxial 6.5 inch E0060 C18EN002A
pdf Download datasheet C18EN002/A
Frequency response
F Seas Excel loudspeaker coaxial E0060 08 06 C18EN002 A   D Seas Excel loudspeaker coaxial E0060 08 06 C18EN002 A

TS Seas Excel loudspeaker coaxial E0060 08 06 C18EN002 A

 *IEC 268-5(Tweeter via high pass butterworth filter 3500 Hz, 12 dB/oct)  SEAS reserves the right to change technical data

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  1. E0051-04/06 C16N001/F