[. . . ] In order to receive service, the purchaser must provide Rockford with a copy of the receipt stating the customer name, dealer name, product purchased and date of purchase. Products found to be defective during the warranty period will be repaired or replaced (with a product deemed to be equivalent) at Rockford's discretion. Any product which has had the serial number defaced, altered, or removed 5. [. . . ] ⷠ(1) Set T2 Series Speakers with Tweeters and 2-Way Crossover or (1) Set T2 Series Tweeters with HP Crossover · Removing tabs for some installations Use pliers to break off plastic tab. Be sure to carefully read and understand the instructions before attempting to install these speakers. For safety, disconnect the negative lead from the battery prior to beginning the installation. Use high quality connectors for a reliable installation and to minimize signal or power loss. For easier assembly, we suggest you run all wires prior to mounting your speakers in place. 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. If installation in a boat, take care not to cut or drill through the main hull. Running the wires inside the vehicle or hull area provides the best protection. Use rubber or plastic grommets to protect any wires routed through metal, especially the firewall. Use tip of a small flat screwdriver to remove tweeter Ensure an area large enough for the speaker to mount evenly. Be sure that the mounting location is deep enough for the speaker to fit; if mounting in a door, operate all functions (windows, locks, etc. ) through their entire operating range to ensure there is no obstruction. Refer to the specification chart to determine the proper diameter hole to cut for your speaker model. Feed the speaker wires through the cutout and connect to the speaker terminals. [. . . ] Connecting positive wire to -2dB or -4dB to reduce the amplitude of the tweeter -2dB or -4dB lower than the mid-range, (ideal for tweeters located high in door panels and mid-range low in the kick panel). +2dB increases and -2dB reduces the amplitude of tweeter in relation to the mid-range, (ideal when matching offset installation like tweeters located high in door panels and midranges low in kick panels). Use illustration for proper connection and be sure to maintain speaker polarity. [. . . ]