Eighteen Sound’s 15-inch 15NCX750 high output neodymium coaxial transducer is designed for use in compact reflex enclosures and stage monitors as small as 40lt with a nominal dispersion of 90×90 degrees. The 15NCX750H (pictured here) is available with the proprietary horn assembly and has a nominal dispersion of 90×40 degrees.
More details from Eighteen Sound (www.eighteensound.com):
Thanks to its high damping pulp composition, the curvilinear profile LF cone provides smooth response within its intended frequency range.
The 75mm (3in) LF copper voice coil employs Interleaved Sandwich Voice coil (ISV) technology. The low distortion and sound quality are further improved by an aluminum demodulating ring (SDR technology) that improves LF impedance and phase with constant power transfer, for low distortion.
Equipped with a proprietary hybrid radial tangerine phase plug, the integrated HF compression driver has been designed to give a smooth, coherent wavefront at the horn entrance in all working frequency ranges with a high level of manufacturing consistency. The phase plug assures low distortion and remarkable improvements in mid-high frequency reproduction. A copper sleeve reduces inductance value above 10kHz, improving phase and impedance linearization.
The 2.4-inch diameter HF diaphragm assembly uses a high strength, high temperature treated Nomex voice coil former joined directly to the titanium diaphragm on its upper bend edge to secure extended frequency energy transfer. This improves linearity and shows unparalleled reliability when compared with a straight former joint. A specific HF exit profile design has been chosen in order to maximize the cone’s profile coupling.
The high force neodymium single magnet structure makes the 15NCX750 and the 15NCX750H a lightweight speaker choice for its performance class, weighing it at a mere 5.1kg (11.25 lb).
