The Blackair range of products has always stood for great quality at a great price and this woofer is no exception! 3 4 layer voice coil. Mounting depth: 8.7 (220mm), mounting diameter: 13.8 (350mm). Enclosure volume: 2 4 cubic feet. Subwoofer Q and A Q : What does a subwoofer do?A : A subwoofer is a speaker designed to reproduce the lowest deepest music notes in any music, typically from 10hz to 120Hz. Q : Does the Size matter? A : The subwoofer size will change the depth and punch of the sound reproduction. The smaller the subwoofer the faster and more punchy it can play, the larger the subwoofer the deeper and lower the bass reproduced. Q : Do i need an enclosure? A : A Subwoofer 90% of the time will need an enclosure designed specifically to the subwoofer itself. There are many types of enclosure but typical used enclosed are a sealed enclosure, mainly for sound quality and a ported enclosure for streetbass and SPL. Q : What are the power ratings for? A : Excursion is the amount of up and down movement a speaker has, the more excursion the woofer has the more sound pressure the woofer can generate thus the louder the subwoofer can be. A : HZ is the measurement of oscillations per minute that a speaker produces, the smaller the number of HZ the lower deeper the sound produced, in terms of a subwoofer they produce often between 10-120Hz. Any product you return must be in the same condition you received it and in the original packaging. Award winning products and innovative product design from the UKs number one car audio brand. The item "Vibe Blackair 15 Car Stereo Audio 3000W Peak Bass Sub SQL Subwoofer Speaker" is in sale since Tuesday, August 25, 2020. This item is in the category "Vehicle Parts & Accessories\In-Car Technology, GPS & Security\In-Car Entertainment\Subwoofers". The seller is "vibe_uk" and is located in Sutton Coldfield. This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, Trinidad and tobago, Uruguay, Viet nam.