User manual SONY XM-405EQX2

[. . . ] Choose the mounting location carefully so that the unit will not interfere with the normal movements of the driver and so it will not be exposed to direct sunlight or hot air from the heater. Do not install the unit under the floor carpet, where the heat dissipation from the unit will be considerably impaired. 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. [. . . ] Switch is set to ON, these filters do not work. 7 EQUALIZER level control 69 Commandes de réglage de la fréquence de coupure You can change the settings of the five band (50 Hz, 200 Hz, 800 Hz, Règle la fréquence de coupure (50-200 Hz) pour les filtres passe-bas ou passe-haut. When the DIRECT switch is set to ON, this circuit is not activated. Turn this control to boost the frequencies around 40 Hz to a maximum of 10 dB. 8 Commande de niveau LOW-BOOST Tournez cette commande pour amplifier les fréquences autour de 40 Hz à un maximum de 10 dB. Qa INPUT MODE select switch When no input lead is connected to SUBWOOFER INPUT, the switch can be qa Sélecteur INPUT MODE used to change the SUBWOOFER OUTPUT as follows. Note If you do not use the high-pass filter and equalizer circuit, set the DIRECT switch to ON for more enjoyable high quality sound. This unit is designed for negative ground 12 V DC operation only. Use speakers with an impedance of 2 to 8 ohms (4 to 8 ohms when used as a bridging amplifier). 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 or antenna, interference may occur. In this case, relocate the amplifier away from the car radio or antenna. 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 circuit 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. [. . . ] Therefore, it may not perform to its full potential if used with the speaker cords supplied with the car. If your car is equipped with a computer system for navigation or some other purpose, do not remove the ground wire from the car battery. If you disconnect the wire, the computer memory may be erased. To avoid short circuits when making connections, disconnect the +12 V power supply lead until all the other leads have been connected. [. . . ]