User manual SONY XM-255EX

[. . . ] Use speakers with suitable impedance (2 to 8 ohms). Make sure to place the unit in a well ventilated location. The power connecting leads are installed too close to the RCA pin cords. The ground lead is not securely connected. [. . . ] First, place the unit where you plan to install it, and mark the positions of the four screw holes on the surface of the mounting board (not supplied). Then drill the holes approximately 3 millimeters (mm) in diameter and mount the unit onto the board with the supplied mounting screws. the supplied mounting screws are 15 mm long. Therefore, make sure that the mounting board is thicker than 15 mm. If the fuse blows again after replacement, there may be an internal malfunction. When replacing the fuse, be sure to use one matching the amperage stated above the fuse holder. Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit. This unit is designed for negative ground 12 V DC operation only. Use speakers with suitable impedance (2 to 8 ohms). Do not connect any active speakers (with built-in amplifiers) to the speaker terminals of the unit. Doing so may damage the active speakers. Avoid installing the unit in areas subject to: -- high temperatures such as from direct sunlight or hot air from the heater -- rain or moisture -- dust or dirt. If your car is parked in direct sunlight and there is a considerable rise in temperature inside the car, allow the unit to cool down before use. When installing the unit horizontally, be sure not to cover the fins with the floor carpet, etc. If this unit is placed too close to the car radio, interference may occur. In this case, relocate the amplifier away from the car radio. If no power is being supplied to the master unit, check the connections. This power amplifier employs a protection circuit to protect the transistors and speakers if the amplifier malfunctions. Do not attempt to test the protection circuits by covering the heat sink or connecting improper loads. Do not use the unit on a weak battery as its optimum performance depends on a good power supply. For safety reasons, keep your car audio volume moderate so that you can still hear sounds outside your car. To a metal surface of the car Remote output * Sortie de télécommande * (REM OUT) Car audio Autoradio Fuse (20 A) Fusible (20 A) +12 V car battery Batterie de voiture +12 V * If you have the factory original or some other car audio without a remote output on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. [. . . ] The output signals to the subwoofer will be the combination of both the right and left output signals. Use the THROUGH terminal when you install more amplifiers. In this case, the signals are output as they are input. If you wish to use a subwoofer as a monaural speaker, connect the speaker as illustrated above. [. . . ]