User manual KENWOOD KAC-723

[. . . ] 2CAUTION · If sound is not output normally, immediately turn power off and check connections. · Be sure to make correct connections of the sigma servo terminals. · Be sure to turn the power off before changing the setting of any switch. · If the fuse blows, check cables for shorts, then replace the fuse with one of the same rating. [. . . ] Do not remove caps from unconnected cables or connectors to prevent short circuits. · Connect the speaker cables to appropriate speaker connectors separately. Sharing the negative cable of the speaker or grounding speaker cables to the metal body of the car can cause this unit to fail. · After installation, check that the brake lamps, winkers, and wipers work properly. Installation Self-tapping screw (ø4 ×16 mm) , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Installation board, etc. (thickness : 15 mm or more) Since the power amplifier has no parts which require operation, it can be installed at a position away from the driver's seat without any hindrances. As generally accepted positions for its installation, places such as inside the trunk, etc. · Install this unit in a location which allows heat to easily dissipate. · The surface temperature of the amplifier will become hot during use. Install the amplifier in a place where people, resins, and other substances that are sensitive to heat will not come into contact with it. · When making a hole under a seat, inside the trunk, or somewhere else in the vehicle, check that there is nothing hazardous on the opposite side such as a gasoline tank, brake pipe, or wiring harness, and be careful not to cause scratches or other damage. · Do not install near the dashboard, rear tray, or air bag safety parts. With this connection, shock noise may be generated when the power of the genuineaccessory car stereo is switched ON/OFF. 6 English s Power and Speakers cable connection Distribute the speaker cables and sigma servo cables along the same paths. Round terminal (Small) Power control cable (Commercially available part) Subwoofer FUSE(20A) POWER IN BATT 20 GND SERVO SERVO P. CON(REMOTE) SPEAKER OUTPUT SERVO FUSE(20A) 20 Terminal cover Battery cable (Commercially available part) Power control (REMOTE) lead terminal Round terminal (Medium) Ground cable (Commercially available part) Round terminal (Large) Protective Fuse 2WARNING Battery + - To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery's positive terminal. Wiring · If a buzzing noise is heard from the speakers when the engine is running, connect a line noise filter (optional) to each of the battery wire. · Do not allow the cord to directly contact the edge of the iron plate by using Grommets. · Connect the ground wire to a metal part of the car chassis that acts as an electrical ground passing electricity to the battery`s negative - terminal. · Be sure to attach a protective fuse into the battery wire close to the battery. Use a protective fuse having a capacity that is about 10 A higher than the maximum current drawn by the amplifier. · Use vehicle-type (fire-resistant) power supply wiring wire for the battery wire and the ground wire. The current capacity of the power supply wiring wire should be about 10 A higher than that of the protective fuse capacity (which means about 20 A higher than the maximum current drawn by the amplifier). · When more than one power amplifier are going to be used, use a power supply wiring wire and protective fuse of greater current-handling capacity than the total maximum current drawn by each amplifier. Power terminal Connect to their respective terminals the power control wire, power supply wire, and ground wire, all of which pass through the associated terminal cover. [. . . ] Power terminal Connect to their respective terminals the power control wire, power supply wire, and ground wire, all of which pass through the associated terminal cover. Once the connections are complete, place the cover on the terminal section. Example: One Power Amplifier Is Used Maximum Current Drawn 28 A Protective Fuse 40 A ×1 [20 A ×2] Cross-sectional Area of Wiring 5 mm2 (AWG 10) or greater ×1 Wire (AWG) 25 A 50 A 25 A 25 A 25 A English 7 Sigma servo feed back The sound reproduced through conventional amplifiers is distorted due to the counterelectromotive force produced in the oscillating system of the speaker. The counterelectromotive force is particularly high with the woofer which requires a large drive mass. The sigma servo connection reduces distortion caused by the counterelectromotive force by including the circuit up to the speaker terminals in the negative feedback loop. This makes it possible to drive speakers with more fidelity to the input signals and create a sharp bass sound image with few feeling of noise interference. [. . . ]