Kenwood KAC-X401M Instruction Manual

Also see for KAC-X401M: Service manual Instruction manual Instruction manual

Sigmaservo feedback|eeeasThe sound reproduced through conventional amplifiers is distorted due to thecounterelectromotive force produced in the oscillating system of the speaker. Thecounterelectromotive force is particularly high with the woofer which requires a large drivemass.The sigma servo connection reduces distortion caused by the counterelectromotive forceby including the circuit up to the speaker terminals in the negative feedback loop. This makes itpossible to drive speakers with more fidelity to the input signals and create a eel bass soundimage \with few feeling of noise interference.The speaker wires and sigma servo wires should be distributed along the same paths.ACAUTIONe The extension of ic negative feedback loop to include the speaker terminals makes itnecessary to connect the sigma servo terminals correctly. Incorrect connection may result insound degradation or other malfunction. If sound is not reproduced normally, check theconnection 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.e When connecting speakers in a parallel configuration, use speakers with an impedance of 4ohms or more. Connecting speakers with smaller impedance than 4 ohms will causemalfunction.eTheratedinputofthespeakersconnectedtothis unitshouldbenolessthanthemaximumoutputoftheamplifier.Otherwisemalfunctionmayresult.Be specially careful in this when connecting speakers in a parallel configuration.m@ Basic sigma servo connection M@ Series connection[ ACAUTION |.Make this wire as short as possible.Hi Parallel connection (2)L_AcauTion | . |The speaker wires connected to this unit : |should be thick enough to supply the currentcapacity of two speakers.This connection is possible only when thespeakers are identical and the speaker wiresare also of the same type and length.Hi Simplified sigma servo connectionIn case any of the connection examples above cannot beused or if the speakers cannot be connected to the speaker |terminals, connect them to this unit as shown in the figure.English 11

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