Polyglass cone with butyl rubber surround. Power range: 50-200 watts RMS. Sealed box volume: 0.35-0.71 cubic feet. Ideal Sealed Box Volume (cubic feet).
Ideal Ported Box Volume (cubic feet). 85 dB at 2.83 volts 81.21 dB at 1 watt. Cutout Diameter or Length (inches).
Polyglass Cone: The FOCAL Polyglass 21V2 features an 8 polyglass cone woofer for a wide, dynamic frequency response of 40-500Hz that offers neutral, coloration free sound. The uniform deposit of hollow-glass microballs over the entire cellulose pulp cone greatly increases its rigidity without adding significant weight, so you get a woofer that is durable, yet efficient, and sounds great.
NBR Surround: The FOCAL Polyglass 21V2 features a NBR (Nitrile Butyl Rubber) surround for long excursion, deep bass, and added durability to promote long life. Louvered Cooling System: The Polyglass 21V2's Louvered Cooling System is self-regulated ventilation system which increases air cooling, prevents heat build-up, and provides optimized reliability with performance consistency.
120mm Magnet: The Polyglass 21V2 woofer features a 120mm (4.725) ferrite magnet for higher sensitivity up to 85dB (2.83V/1m). Die Cast Chassis: The FOCAL Polyglass 21V2 features a die-cast Zamak chassis which is a rigid, non-magnetic, and non-resonant frame that provides a strong, reliable structure for the woofer. Spring-Posts: The FOCAL 8 woofer is equipped with a pair of nickel-plated spring-post speaker terminals for easy connection up to 10AWG wire. Foam Gasket: The Polyglass 21V2 comes supplied with a self-adhesive foam gasket mounting-ring for better chassis damping and to prevent air leakage.
Recommended Sealed Box Volume: The FOCAL Polyglass 21V2 is designed to be installed in a sealed box with a volume between 0.42 cu/ft to 0.71 cu/ft. FOCAL recommends a sealed enclosure made out of 3/4 MDF with an internal volume of 0.53 cu/ft.
Sealed Enclosure Specifications (using 3/4 MDF construction). Width: 13.375" Height: 10.25" Depth1: 10.25" Depth2: 7.0625". Width: 14.1875" Height: 11.0" Depth1: 11.0" Depth2: 7.0625".
Width: 16.125" Height: 11.75" Depth1: 16.125" Depth2: 7.0625". The item "FOCAL 21V2 SUB 8 500W CAR AUDIO 4OHM POLYGLASS SUBWOOFER CLEAN BASS SPEAKER NEW" is in sale since Friday, September 15, 2017. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Audio\Car Subwoofers". The seller is "avoverstock" and is located in Tampa, Florida.This item can be shipped to United States.