Assessments - 4, GPA: 4.3
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• 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. Errors do occasionally occur. 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. Ft. Example Dimensions: 14" W x 14" H x 11.5" D Better Bass Performance Small Enclosure (Vb) Box Volume=1.00 Cu. Ft. Example Dimensions: 15" W x 14" H x 13" D Best Bass Performance Medium Enclosure (Vb) Box Volume=1.25 Cu. Ft. 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. Ft. 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. Ft. 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. Ft. Example Dimensions: 14" W x 20.25" H x 14" D (P) Port=3" ID x 11.75" Long Note: All specifications are subject to change without notice. Attention/Notice: Dimensions are external. 8 SD12 ENCLOSURE DIMENSIONS Bandpass Enclosure Good Bass Performance/Mini-Enclosure (Vf) Box Volume .84 Cu. Ft. (Vr) Box Volume .47 Cu. Ft. (P) Port 4" ID x 1.0" Long (Sb) Speaker baffle location/outside front: 9.25" Example Dimensions: 15" W x 16.5" H x 15" D Better Bass Performance/Small Enclosure (Vf) Box Volume .84 Cu. Ft. (Vr) Box Volume .69 Cu. Ft. (P) Port 4" ID x 2.625" Long (Sb) Speaker baffle location/outside front: 9.25" Example Dimensions: 15" W x 18.5" H x 15" D Best Bass Performance/Medium Enclosure (Vf) Box Volume .84 Cu. Ft. (Vr) Box Volume .91 Cu. Ft. (P) Port 4" ID x 4.25" Long (Sb) Speaker baffle location/outside front: 9.25" Example Dimensions: 15" W x 20.75" H x 15" D Note: All specifications are subject to change without notice. Attention/Notice: Dimensions are external. 9 SD12 WARRANTY Limited One-Year Warranty This warranty gives you specific legal rights. You may also have other rights which vary from state to state. Dual Electronics Corp. warrants this product to the original purchaser to be free from defects in material and workmanship for a period of one year from the date of the original purchase. Dual Electronics Corp. agrees, at our option, during the warranty period, to repair any defect in material or workmanship or to furnish an equal new, renewed or comparable product (whichever is deemed necessary) in exchange without charges, subject to verification of the defect or malfunction and proof of the date of purchase. Subsequent replacement products are warranted for the balance of the original warranty period. Who is covered? This warranty is extended to the original retail purchaser for products purchased and used in the U.S.A. What is covered? This warranty covers all defects in material and workmanship in this product. 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. What to do? 1. 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. 2. 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. 3. Ple...
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