[. . . ] We provide a manufacturer guarantee for our products bought within the European Union. De or ask for them directly at: 200 D-31139 Hildesheim The cables from the amplifier to the subwoofer should be kept as short as possible and have a cross section of at least 2. [. . . ] All abutting housing walls should be glued, screwed together and sealed to avoid a continuing detachment due to vibrations and environmental influences in the vehicle. Acoustic insulating material (sheep's wool or polyester web) which fills the inside volume to at least 50 percent increases the effective housing volume by 5 to 15 percent. Fanerskivor och plywood av god kvalitet med en tjocklek på 18 till 25 mm passar bra till lådan. Genom att fylla lådan med akustiskt dämpningsmaterial (av ull eller polyesterfiber) till minst 50 procent av den inre volymen, utökar du lådans effektiva volym med 5 till 15 procent. Please read these operating instructions before using the equipment for the first time. We provide a manufacturer guarantee for our products bought within the United States of Amerika. Disconnect the negative terminal of the battery before carrying out installation and connection work. Observe the vehicle manufacturer's safety instructions (regarding airbags, alarm systems, trip computers, vehicle immobilisers). Prior to drilling the mounting holes, make sure that no cables and parts of the vehicle will be damaged. Do not install subwoofers on loose rear shelves (fastback vehicles) or at places open to the front. Notes about installing subwoofer housings Before installing the housing, please observe some fundamental design instructions: Subwoofers with infinite baffle can be installed in a vehicle by simply using a wooden board trimmed to size which ensures an acoustic separation between the front and rear sound components of a woofer. The wooden board is affixed in the trunk under the rear shelf or in the back of the rear seat bench. [. . . ] Peak power handling RMS power handling Nominal impedance DC resistance (Re) Resonance frequency (fs) Frequency Response Total Q factor (Qts) Mechanical Q (Qms) Electrical Q (Qes) Effective cone area (Sd) Equivalent air volume (Vas) Sensitivity 4000 Watt 1000 Watt 2 x 2 ohms 2 x 1. Peak power handling RMS power handling Nominal impedance DC resistance (Re) Resonance frequency (fs) Frequency Response Total Q factor (Qts) Mechanical Q (Qms) Electrical Q (Qes) Equivalent air volume (Vas) Effective cone area (Sd) Xmax Sensitivity 4800 Watt 1200 Watt 2 x 2 ohms 2 x 1. [. . . ]