Alesis M1Active MKII User Manual - Page 40

Specifications SPECIFICATIONS ENCLOSURE MATERIALS AND CONSTRUCTION Front baffle painted in metallic charcoal-gray, one inch (1") thick MDF with radiused edges to minimize diffraction. Sides and rear baffle covered in metallic charcoal-gray vinyl laminate, over five-eighths inch (0.625") thick MDF. Dual ports with 45° inlet and flared front baffle outlet allow precise, phase accurate woofer-to-port frequency transition. Ports also aid in cooling internally mounted primary amplifier heat sink. Flush mount, rubber woofer trim ring allows consistent power response characteristic at wide off-axis angles. Flush-mount tweeter plate assures smooth off-axis response. UL-approved fiberglass acoustical damping material damps internal midfrequency reflections from rear of woofer cone before entering port, lessening IM distortion. TRANSDUCERS LOW FREQUENCY DRIVER: 6.5" (165mm) diameter dynamic driver with proprietary non-woven carbon fiber (NWCF) cone and 1.5" diameter, long-wind voice coil. Dampened linear rubber surround with moderate internal damping and constant linear displacement Nomex spider. ±5 mm X-max excursion capability. Dual magnet structure uses top magnet in opposed ("bucking") configuration for magnetic shielding. HIGH FREQUENCY DRIVER: 1" silk soft-dome tweeter with special wave guide baffle. Low-viscosity ferrofluid cooling extends power handling while retaining impulse response capability. Dual magnet structure uses top magnet in opposed ("bucking") configuration for magnetic shielding. 42 M1 Active Reference Manual