User manual JBL GT4-10

[. . . ] GT4 SERIES TM Owner's Manual Einbauanleitung Guide d'utilisation Manual del propietario Gebruikershandleiding Manuale utente Bruksanvisning Omistajan käsikirja Manual do utilizador Automotive Subwoofers Owner's Manual GT4-10 GT4-12 GT4-15 Choosing an Enclosure JBL GT4 Series Thank you for purchasing a new JBL GT4 Series subwoofer. Subwoofer installation requires woodworking skills and some experience disassembling and reassembling automotive interiors. [. . . ] Because vented enclosures require the volume of the enclosure and the size of the port to have a specific relationship with the characteristics of the woofer, the enclosure must be built exactly to the specifications provided. While there are some prefabricated vented boxes available, matching a prefabricated box to a particular woofer is difficult. If you wish to use a vented enclosure, we strongly recommend having your authorized JBL dealer build it or verify that your design is correct if you wish to build it yourself. An optimum vented enclosure is always larger than the optimum sealed box for the same woofer and will require more space inside the vehicle. Bandpass enclosures often provide the most output available from any amplifier and subwoofer combination at the expense of sonic accuracy. If sheer SPL (soundpressure level) is what you desire most, choose a bandpass enclosure. Bandpass-enclosure design is very tricky and the aid of a computer and enclosure design software is necessary. If you are an experienced installer or have some woodworking experience, you may wish to build the enclosure described in the enclosure design sheet included with this woofer. Fortunately, there are many prefabricated bandpass boxes available and they are all optimized to extract the most output possible from any woofer. Bandpass enclosures can be quite large and may require a lot of space inside your vehicle. 1 Connecting Your Subwoofer to Your Amplifier JBL GT4 Series JBL GT4 Series subwoofers are single 4-ohm voice coil. Depending on the amplifiers you are using, you may want to use either one or several subwoofers in the same enclosure to maximize the power available from your amplifiers. To achieve the maximum amplifier output possible, you should design a speaker system that provides the lowest impedance that your amplifier is rated to drive safely. [. . . ] 72500 Chateau-du-Loir ©2003 JBL, Incorporated · JBL is a registered trademark of JBL, Incorporated Part No. GT4SUBSEROM We, Harman Consumer International 2, route de Tours 72500 Chateau-du-Loir FRANCE declare in own responsibility, that the products described in this owner's manual are in compliance with technical standards: EN 50081-1:1992 EN 50082-1:1997 Emmanuel Millot Harman Consumer International Chateau-du-Loir, FRANCE. [. . . ]