User manual SONY XM-ZR704 annexe 2

[. . . ] Low-pass filter, high-pass filter and low boost circuit, separated for both the left and right sides. The DIRECT switch can be used to bypass the low-pass filter, high-pass filter and low boost circuit for more enjoyable high quality sound. You can visually confirm the output level of both the left and right sides with the power level indicator. * Pulse power supply This unit has a built-in power regulator which converts the power supplied by the DC 12 V car battery into high speed pulses using a semiconductor switch. [. . . ] Protection circuit This amplifier is provided with a protection circuit that operates in the following cases: -- when the unit is overheated -- when a DC current is generated -- when the speaker terminals are short circuited. The color of the POWER/PROTECTOR indicator will change from green to red, and the unit will shut down. If this happens, turn off the connected equipment, take out the cassette tape or disc, and determine the cause of the malfunction. If the amplifier has overheated, wait until the unit cools down before use. If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer. 1 Power level indicator Indicates the output levels of both the left and right sides. 2 POWER/PROTECTOR indicator Lights up in green while the unit is in operation. The color will change from green to red and the unit will shut down when the protection circuit is activated due to a malfunction of the unit. 3 LOW BOOST level control Turn this control to boost the frequencies around 40 Hz to a maximum of 10 dB. 6 LEVEL adjustment control The input level can be adjusted with this control when using source equipment made by other manufacturers. 7 DIRECT switch When the DIRECT switch is ON, the signal does not go through the low-pass filter, high-pass filter and low boost circuit. If you connect more than three amplifiers, it may cause problems such as sound dropout. Pass the leads through the cap, connect the leads, then cover the terminals with the cap. Power supply lead (yellow) Fil d'alimentation (jaune) Clamping connector (supplied) Serre-fil (fourni) Remote output * Sortie de télécommande * (REM OUT) Extension lead (supplied) Fil-rallonge (fourni) " Note Make sure that the line output from the car audio is connected to the jack marked "L (MONO)" on the unit. When using passive crossover networks in a multispeaker system, care must be taken as the speaker system's impedance should not be lower than that of the suitable impedance for this unit. When you are installing a 12 decibels/octave system in your car, the following points must be considered. In a 12 decibels/octave system where both a choke and capacitor are used in series to form a circuit, a great care must be taken when they are connected. In such a circuit, there is going to be an increase in the current which bypasses the speaker with frequencies at around the crossover frequency. If audio signals are continued to be fed into the crossover frequency area, it may cause the amplifier to become abnormally hot or the fuse will be blown. also if the speaker is disconnected , a series-resonant circuit will be formed by the choke and the capacitor. In this case, the impedance in the resonance area will decrease dramatically resulting in a short circuit like situation causing a damage to the amplifier. Therefore, make sure that a speaker is connected to such a circuit at all times. [. . . ] Connect the +12 V power supply lead only after all the other leads have been connected. Be sure to connect the ground lead of the unit securely to a metal point of the car. Be sure to connect the remote control lead of the car audio to the remote terminal. When using a car audio without a remote output on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. [. . . ]