User manual DUAL SD12

[. . . ] If you feel unsure about installing this system yourself, have it installed by a qualified audio technician. Before installation, disconnect the battery negative (-) terminal to prevent damage to the unit, fire and/or possible injury. CAUTION CAUTION CAUTION 2 SD12 INSTALLATION Installation CAUTION The following installation instructions are very basic. If you feel unsure about personally installing this speaker system, Dual recommends aquiring the services of a professional car audio installation center. Before installation, please follow the following rules: 1. Be sure to carefully read and understand the instructions before attempting to install this product. [. . . ] · Use electrical tape and wire ties to ensure all wires are properly secured. · Avoid installing speakers or electronics where they can be subject to moisture. · Ensure the speaker wires are connected using correct polarity. · Speaker wire should be isolated from the vehicle's electrical system to avoid noise being picked up by the amplifiers. · We recommend using 14 gauge or larger sized speaker wire to ensure your subwoofer receives the full power output of your amplifier. Being exposed to sounds over 125dB for even short periods of time can create permanent hearing loss! 5 SD12 GUIDELINES Enclosure Guidelines To work properly, the walls of your enclosure must be free from flexing during high sound pressure generated by your subwoofer(s). For best performance, always use MDF (Medium Density Fiberboard) or Baltic Birch Plywood to build your enclosure. We highly recommend that your wood be at least 3/4" in thickness. The enclosure should be sealed internally with silicon or glue and secured with screws every 4". If the box will be mounted in a vehicle, it should be fastened securely using metal "L" shaped brackets. To build an enclosure, calculations will need to be made using the information found on the following 3 pages. Remember: · Use 3/4" MDF or Baltic Birch Plywood · Use silicon or glue in joints · Use screws every 4 inches We at Dual are diligent in checking the dimensions provided. The engineers, staff and installers provide this information to make your installation go as smoothly as possible. We highly recommend that you personally measure your subwoofer prior to installation to avoid any damage. Please follow the rule "Measure twice, cut once". CAUTION 6 SD12 ENCLOSURE DIMENSIONS Sealed Enclosure Good Bass Performance Mini-Enclosure (Vb) Box Volume=. 75 Cu. Example Dimensions: 14" W x 14" H x 11. 5" D Better Bass Performance Small Enclosure (Vb) Box Volume=1. 00 Cu. Example Dimensions: 15" W x 14" H x 13" D Best Bass Performance Medium Enclosure (Vb) Box Volume=1. 25 Cu. Example Dimensions: 17" W x 15" H x 13" D Note: All specifications are subject to change without notice. Attention/Notice: Dimensions are external. 7 SD12 ENCLOSURE DIMENSIONS Vented Enclosure Good Bass Performance Mini-Enclosure (Vb) Box Volume=1 Cu. Example Dimensions: 14. 25" W x 17" H x 12" D (P) Port=3" ID x 9. 7" Long Better Bass Performance Small Enclosure (Vb) Box Volume=1. 25 Cu. Example Dimensions: 14. 50" W x 17" H x 14" D (P) Port=3" ID x 10. 25" Long Best Bass Performance Medium Enclosure (Vb) Box Volume=1. 5 Cu. [. . . ] A slight adjustment of any custom controls may save you a service call. If you require service during the warranty period, you must carefully pack the product (preferably in the original package) and ship it by prepaid transportation with a copy of the original receipt from the retailer to an authorized service center. Please describe your problem in writing and include your name, a return UPS shipping address (P. O. For more information and for the location of the nearest authorized service center please contact us by one of the following methods: · Call us toll-free at 1-866-382-5476 · E-mail us at cs@dualav. com Exclusion of Certain Damages: This warranty is exclusive and in lieu of any and all other warranties, expressed or implied, including without limitation the implied warranties of merchantability and fitness for a particular purpose and any obligation, liability, right, claim or remedy in contract or tort, whether or not arising from the company's negligence, actual or imputed. [. . . ]