User manual DUAL SD12

[. . . ] Use the highest quality connectors for a reliable installation and to minimize signal or power loss. Be careful not to cut or drill into gas tanks, fuel lines, brake or hydraulic lines, vacuum lines or electrical wiring when working on any vehicle. Never run speaker wires underneath your vehicle. Running speaker wires inside the vehicle provides the best protection from exhaust heat and environmental elements. [. . . ] The positive polarity is marked by a (+) sign. Incorrectly connected subwoofers will result in limited bass output. · 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. · Remember to listen responsibly and respect your ears. 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". Assemble the box before cutting the subwoofer hole(s). 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. [. . . ] The following are not covered: installation/removal costs, damage resulting from accident, misuse, abuse, neglect, product modification, improper installation, incorrect line voltage, unauthorized repair or failure to follow instructions supplied with the product, or damage occurring during return shipment of the product. Before you call for service, check the troubleshooting guide in your owner's manual. 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. [. . . ]