User manual SONY XM-2040

[. . . ] 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. [. . . ] 5 LOW BOOST level control Turn this control to boost the frequencies around 40 Hz to a maximum of 10 dB. The model and serial numbers are located on the bottom of the unit. Record the serial number in the space provided below. Refer to these numbers whenever you call upon your Sony dealer regarding this product. The following checklist will assist in the correction of most problems which you may encounter with your unit. Before going through the checklist below, refer to the connection and operating procedures. AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION 100 watts per channel minimum continuous average power into 4 ohms, both channels driven from 20 Hz to 20 kHz with no more than 0. OTL (output transformerless) circuit Pulse power supply Inputs RCA pin jacks High level input connector Outputs Speaker terminals Through output pin jacks Suitable speaker impedance 2 ­ 8 (stereo) 4 ­ 8 (when used as a bridging amplifier) Maximum outputs 200 W × 2 (at 4 ) 300 W × 2 (at 2 ) 600 W (monaural) at 4 Rated outputs (supply voltage at 14. 008 % or less (at 1 kHz, 4 ) Circuit system Input level adjustment range 0. Accessories Supplied accessories Mounting screws (4) High level input cord (1) Protection cap (1) Design and specifications are subject to change without notice. T Replace both the fuses with a new one. Do not connect the # terminal of the speaker system to the car chassis, and do not connect the # terminal of the right speaker with that of the left speaker. Install the input and output cords away from the power supply wire as running them close together can generate some interference noise. 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 to 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 wire until all the other wires have been connected. Use the THROUGH OUTPUT terminal when you install more amplifiers. The signals are output as they were input. If you connect more than three amplifiers, it may cause problems such as sound dropout. High level input connection cannot use THROUGH OUTPUT. Pass the wires through the cap, connect the wires, then cover the terminals with the cap. [. . . ] Therefore, make sure that a speaker is connected to such a circuit at all times. * 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. " Note If you wish to use a subwoofer as a monaural speaker, connect the speaker as illustrated above. The output signals to the subwoofer will be the combination of the both right and left output signals. [. . . ]