[. . . ] The dual 4 woofer will provide a 2 load when wired in parallel or an 8 load when wired in series. The terminals with the solid-red and solid-black markings are for the second voice coil. The Solo Classic is designed to be used solely with smaller, sealed enclosures and will generate more sound pressure than any competing subwoofer on the market. [. . . ] To get the best performance from your new KICKER Subwoofer, we recommend using genuine KICKER Accessories and Wiring. Please allow two weeks of break-in time for the subwoofer to reach optimum performance. Kicker warrants this product to be free from defects in material and workmanship under normal use for a period of THREE (3) MONTHS from date of original purchase with receipt. When purchased from an Authorized KICKER Dealer it is warranted for ONE (1) YEAR from date of original purchase with receipt. Should service be necessary under this warranty for any reason due to manufacturing defect or malfunction during the warranty period, Kicker will repair or replace (at its discretion) the defective merchandise with equivalent merchandise at no charge. Discontinued products may be replaced with more current equivalent products. This warranty is valid only for the original purchaser and is not extended to owners of the product subsequent to the original purchaser. Any applicable implied warranties are limited in duration to a period of the express warranty as provided herein beginning with the date of the original purchase at retail, and no warranties, whether express or implied, shall apply to this product thereafter. Some states do not allow limitations on implied warranties; therefore these exclusions may not apply to you. This warranty gives you specific legal rights; however you may have other rights that vary from state to state. WHAT TO DO IF YOU NEED WARRANTY OR SERVICE Defective merchandise should be returned to your local Authorized Stillwater Designs (Kicker) Dealer for warranty service. You can confirm that a dealer is authorized by asking to see a current authorized dealer window decal. If it becomes necessary for you to return defective merchandise directly to Stillwater Designs (Kicker), call the Kicker Customer Service Department at (405) 624-8510 for a Return Merchandise Authorization (RMA) number. Package all defective items in the original container or in a package that will prevent shipping damage, and return to: Stillwater Designs, 3100 North Husband, Stillwater, OK 74075 The RMA number must be clearly marked on the outside of the package. [. . . ] Any questions can be directed to the Kicker Customer Service Department at (405) 624-8510. Contact your International Kicker dealer or distributor concerning specific procedures for your country's warranty policies. WARNING: KICKER products are capable of producing sound levels that can permanently damage your hearing! [. . . ]