Fostex 8cm cone type bass reflex full range unit FF85WK

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ----------------------------------------------------------------------

Two-layer papermaking is a unique technology in which cone paper is made in two stages, making one sheet of cone paper with two layers: a base layer and a surface layer. The FF-wk series uses long-fiber (low-beatenness) wood pulp for the base layer to achieve high rigidity and moderate internal loss due to its sublime structure, and the surface layer is blended with short-fiber (high-beatenness) kenaf and Bincho charcoal powder to increase the propagation speed on the surface of the corn paper. In addition, the edge shape is up-rolled to achieve a high stroke, and the material is urethane foam specially formulated with a polycarbonate material that has contradictory physical properties such as high loss and high Young's modulus. *The color tone of the cone paper surface of the FF-WK series is obtained from binchotan charcoal and no dyes are used. Therefore, the color tone of the cone paper surface differs from case to case. Adopts a center cap made of aluminum alloy molded into a ridged dome shape. High-frequency coloration is reduced by dispersing and weakening strong resonance at specific frequencies. Also, by connecting directly to the voice coil bobbin, the high frequency playback band is expanded. A three-point adhesive method is used to attach the cone paper, damper, and voice coil at the same location. By increasing the strength of the cone neck, we have achieved improved high-frequency characteristics. In addition, by creating a pocket shape in the damper neck, it is possible to attach three points while using a relay wire for the voice coil. In order to minimize changes in sound quality, the input terminals are gold-plated Faston 205 type terminals. The FF-wk series is a full-range unit designed exclusively for bass reflexes that has completely revised the structure of the previous FF series and added a new 10cm aperture to the lineup. By adopting a new paper-making method called ``2-layer paper cone'', a ridged dome-shaped aluminum alloy center cap, and a pocket neck damper, we have achieved powerful low-frequency and high-frequency reproduction without any character while maintaining clear and realistic sound quality.