User manual PIONEER SE-CL721

[. . . ] To prevent malfunction of the amplifier and speakers, the protective circuit will cut the power supply to the amplifier (sound will stop) when an abnormal condition occurs. In such a case, switch the power to the system OFF and check the connection of the power supply and speakers. To prevent an electric shock or short-circuit during connection and installation, be sure to disconnect the negative (­) terminal of the battery beforehand. Confirm that no parts are behind the panel when drilling a hole for installation of the amplifier. [. . . ] If you decrease the volume of the head unit and set the gain control of the amplifier to the proper position but still the sound cuts out from time to time, contact the nearest authorized PIONEER Service Station. Relationship between the gain of the amplifier and the output power of the head unit Power Normal gain Equal power Power Maximum gain If you raise the gain of the amplifier to an improper level, only distortion is increased and the power increases only slightly. With high output the signal waveform is distorted, if you raise the gain of the amplifier the power changes only slightly. To protect the wiring, wrap adhesive tape around it where they lie against metal parts. Do not route wires where they will get hot, for example where the heater will blow over them. If the insulation heats up, it may become damaged, resulting in a short-circuit through the vehicle body. Make sure that wires will not interfere with moving parts of the vehicle, such as the gearshift, handbrake or seat sliding mechanism. Never feed power to other equipment by cutting the insulation of the power supply wire to tap from the wire. Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns. Do not ground the speaker wire directly or connect a negative (­) lead wire for several speakers. After making all other connections to the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. We recommend that you use the special red battery and ground wire [RD-228], which is sold separately. Failure to securely fasten the battery wire to the terminal using the terminal screws could cause the terminal area to overheat and could result in damage and injury including minor burns. Expose the end of the speaker wires using nippers or a cutter by about 10 mm to 12 mm. Connect the car stereo speaker output wires to the amplifier using the supplied speaker input wire with RCA pin cord. As a result of connecting the car stereo speaker output wire to the amplifier, the power of the amplifier is turned on automatically when the car stereo is turned on. It is not necessary to connect the system remote control wire in this case. In the case the amplifier and head unit are connected using a speaker input wire with RCA pin cord, the amplifier power is only turned on when one amplifier is being used. If two or more amplifiers are synchronously connected in combination, connect the head unit and all of the amplifiers with the system remote control wire. Connect the system remote control wire when the power of the amplifier is not to be turned on when the car stereo is turned on. Connect the speaker leads to suit the mode according to the figures shown below. [. . . ] Make temporary connections first and check that the amplifier and the system operate properly. After installing the amplifier, confirm that the spare tire, jack and tools can be easily removed. Attach with tapping screws (3 mm × 10 mm) at an easily accessible location such as under the dashboard. To ensure proper heat dissipation of the amplifier, be sure of the following during installation. [. . . ]