Yamaha S112V Owner's Manual
Also see for S112V: Owner's manualOwner's manualService manualOwner's manual
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5ENGLISH Subwoofers and the PN90 Crossover NetworkAdding subwoofers to speaker systems like the one shown in the diagram can provide superior dynamic range andoverall sound quality. After dividing the line-level audio from the preamplifier or mixing console into separate fre-quency bands via the PN90 crossover network, the separate frequency bands are sent to separate power amplifiers.Precautions for operating the PN90• Do not connect the PN90 between the power amplifier and speakers. The high voltage levels produced can dam-age the PN90.• Use the PN90 with a load impedance of between 7.5 and 30kΩ. (Rated load impedance is 15kΩ)• The polarity of the LOW signal is inverted at the crossover point between the LOW and HIGH signals. Com-pensate for this by reversing the polarity when connecting the power amplifier output jacks to a subwoofer.Note that you must reverse the polarity between the power amplifier and subwoofers rather than between thePN90 and power amplifier to prevent damage to the connected device.• The PN90’s connectors are unbalanced phone jacks. Use shielded audio cable with phone plugs to connect tothe PN90. Do not use speaker cable.• Adjust the level of the LOW and HIGH signals using the power amplifier volume controls.SUBWOOFERMIXINGCONSOLETWO-CHANNELGRAPHICEQUALIZERLEFTINPUTSRIGHTPN90LEFTHIGHRIGHTINPUTTO POWERAMP INPUTSLEFTRIGHTLOW INPUTTWO-CHANNELPOWER AMPLIFIERTWO-CHANNELPOWER AMPLIFIEROUTPUTOUTPUTSPEAKERSYSTEMSPEAKERSYSTEMLRLRLRLRLRLRSUBWOOFER |
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