Electro-Voice EVX-180B

The EVX-180B low-frequency transducer is designed for professional sound reinforcement or studio monitoring applications that require maximum output with low distortion. The EVX-180B woofer provides unprecedented power capacity, linearity and excursion, made possible by the HeatWick total-thermal-engineering design. The proprietary HeatWick design actually "wicks" heat away from the voice coil, significantly increasing power handling and long-term reliability. A special frame extension and elongated pole piece provide a metal surface with close proximity to the entire length of the voice coil, providing a major heat-transfer path. Also, the 100-mm (4-in.) diameter voice coil is longer than conventional medium efficiency woofers to give additional power handling and virtually eliminate dynamic-range power compression. Additionally, a Flux Demodulation Device (FDD) reduces distortion in the critical mid-band by providing a "short circuit" effect to prevent amplifier-signal modulation of the static magnetic field. A ribbed, Kevlar fiber composite cone with an extremely high stiffness-to-weight ratio and exceptional strength gives the EVX-180B increased resistance to cone collapse and deformation, without sacrificing efficiency.