K&F SCENA 12 User Manual
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Contents
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User's Manual K&F SCENA 12KLING & FREITAG GMBH © 2018 Version 1.2 Page 15 of 315. Wiring• Before connecting your K&F SCENA 12 speaker, switch off all devices and turn down allfaders and encoders.• Be sure to use high-end speaker cables with an appropriate wire gauge. Select the wiregauge with regard to the cable length.• To connect the mixing console to the power-amp inputs, use shielded 2-pole balancedmicrophone cables equipped with quality connectors.• Avoid creating ground loops.• Be sure to follow the pinouts shown in this manual.• Check for correct polarity of the speaker links to the power amplifier. When usingamplifiers by different manufacturers, make sure the pinout is correct. If necessary,consider modifying the amplifier or connector pinouts as required.• Upon completing wiring, ensure that the connected speaker channels are workingin phase, for example, using a phase tester. When the connected channels are usedsimultaneously, you can identify out-of-phase statuses by bass cancellation or mid-frequency signals (e.g. voices) that cannot be located properly.• When connecting multiple speakers, you can daisy-chain the signal from one speaker tothe next. Make sure that the total impedance of all speakers connected to an amplifierdoes not fall below the minimum impedance specified for the amplifier. 1/R1 + 1/R2 + 1/R3 + … = 1/Rtotal6. Initial Operation• Switch off all devices and turn down all volume controls on the mixing console and theamplifiers.• Wire your K&F SCENA 12 systems as described in this manual.• Switch on the devices in the following order: first the mixing console, then thecontroller and finally the power amplifiers! Be sure to observe this power-up sequenceat all times. Failing to do so may result in switch-on noise that may damage yoursystem.• If you hear noise, turn off all devices in reverse order, then check all cable connections.• Turn up all amplifier channels one after another and output a low-volume signal to thesystem. Check whether the audio is properly routed to the appropriate speakers. Makesure no noise is heard through those speakers.• With amplifiers with insufficient input-stage headroom, you may not always be ableto prevent distortion by reducing the power-amp volume controls. In this case, theclipping indicator may not light when clipping actually occurs! To prevent damage tothe speakers, we recommend fully turning up the power-amp volume controls, thencarefully turn up the volume on the mixing console or controller or reduce the limiterthreshold of the controller as appropriate in order not to overload the amplifiers.• When turning off the system, first turn down the amplifier input controls. Next, powerdown the amplifiers, then turn off the remaining devices. |
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