com The Official Brand of Live Music. INSTALLATION THANK YOU for choosing the JBL® MPS1000. In order that we may better serve you should you require warranty service for your new subwoofer, please retain your original purchase receipt and register your new JBL marine subwoofer online at www. WARNING Playing loud music in a boat can hinder your ability to hear other boats, passengers and nearby swimmers and can permanently damage your hearing. We recommend listening at low or moderate levels while operating your boat. JBL accepts no liability for hearing loss, bodily injury or property damage resulting from the use or misuse of this product. IMPORTANT The MPS1000 has been designed to provide the kind of high-performance low-frequency reproduction that used to require big, clumsy enclosures, large amplifiers and complex installation. To ensure maximum performance, we strongly recommend that installation be entrusted to a qualified professional. Although these instructions explain how to install the MPS1000 in a general sense, they do not show the specific installation methods for your particular boat. If you feel you do not have the necessary tools or experience, do not attempt the installation yourself; rather, ask your authorized JBL car audio or marine audio dealer about professional installation options. Remember to keep this manual and your sales receipt in a safe place for future reference. NOTE: This marine product is not intended for automotive applications. INSTALLATION WARNINGS AND TIPS · Always wear protective eyewear when using tools. · Turn off the audio system and other electrical devices before you start. Disconnect the (­) negative lead from your boat's battery. · At the installation sites, locate and make a note of all fuel lines, hydraulic lines, vacuum lines and electrical wiring. Use extreme caution when cutting or drilling in and around these areas...