Stimmen - 5, Durchschnittliche Bewertung: 3.8
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Anleitung Zusammenfassung
Do not turn the power on if the ground cable is not connected. • Please be sure to install a protective fuse in the power cable, near the battery. Use a fuse which has a capacity about 10A higher than the capacity of the fuse in the unit. • For the power cable and the earth cable, use (flame-resistant) power wiring cables for in-car use. For the power cable, use a power wiring cable with a current capacity about 10A higher than the capacity of the protective fuse (about 20A higher than the capacity of the fuse in the unit). • When more than one power amplifier are going to be used, use a power supply wiring cable and protective fuse of greater current-handling capacity than the total maximum current drawn by each amplifier. Example: One Power Amplifier Is Used Fuse capacity Protective Fuse Cross-sectional Area of Wiring Cable (AWG) 60 A 5 mm2 (AWG 10) or greater . 1 75 A 25 A 25 A 25 A25 A 25 A 25 A SPEAKER OUTPUTFUSE(15A. 4 ) – + – +BATT. GND 151515 SERVO II FEED BACK · Terminal cover Battery Ground cable *Battery cable * Protective Fuse Power terminal * : Commercially available parts Lead terminal * Lead terminal * Power terminal Pass battery and ground cables through supplied terminal cover and connect to respective terminals. After completing connections, fasten terminal cover over terminal bracket. 10 English 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. NOTE The speaker cables and sigma servo cables should be distributed along the same paths. 2CAUTION • The extension of the negative feedback loop to include the speaker terminals makes it necessary to connect the sigma servo terminals correctly. Incorrect connection may result in sound degradation or other malfunction. If sound is not reproduced normally, check the connection of the sigma servo terminals, etc. • If the Sigma servo terminals are not connected, the sound may fluctuate or noise may occur. Be sure to connect the Sigma servo terminals correctly. • When connecting speakers in a parallel configuration, use speakers with an impedance of 4 ohms or more. Connecting speakers with smaller impedance than 4 ohms will cause malfunction. • The rated input of the speakers connected to this unit should be no less than the maximum output of the amplifier. Otherwise malfunction may result. Be specially careful in this when connecting speakers in a parallel configuration. n Basic sigma servo connection n Series connection Make this cable as short as possible. 2CAUTION n Parallel connection (1) n Parallel connection (2) The speaker cables connected to this unit 2CAUTION 2CAUTION This connection is possible only when the should be thick enough to supply the current speakers are identical and the speaker cables capacity of two speakers. are also of the same type and length. n Simplified sigma servo connection In case any of the connection examples above cannot be used or if the speakers cannot be connected to the speaker terminals, connect them to this unit as shown in the figure. English 11 Connection The acoustic properties of vehicle compartment tend to cause oscillation due to resonance or unclearness of 0 dB sound due to standing waves at certain frequencies. The band reject filter can solve the problems of resonance or unclear sound with minimum influence on the sound quality because it eliminates only the frequencies causing resonance or standing waves. Frequency ¦ Adjustment method: The band reject filter cuts only the limited frequencies to minimize influence on the sound quality. Therefore, its effect cannot be obtained unless the cutoff frequencies are set accurately to the frequencies causing resonance and standing waves. The band reject filter can be adjusted according to what you feel through your ears, but we recommend the use of a signal generator or a spectrum analyzer with a fine frequency measurement capability for the adjustment. • Adjustment using a signal generator: Output a sine wave, vary its frequency to find the frequencies at which the vehicle compartment resonates or volume increases (standing waves occur), and set the BAND REJECT FREQUENCY control to the position with which the resonance and standing waves disappear. • Adjustment using a spectrum analyzer: Output white noise (sound in which all frequencies are at a certain level), find the peak frequency observed on the spectrum analyzer, and set the BAND REJECT FREQUENCY control to the position with which the peak observed on the...