C48 Audio Preamplifier Owner's Manual - McIntosh

General Information and Connector InformationGeneral Information1. For additional connection information, refer to theowner’s manual(s) for any component(s) connectedto the C48 Audio Preamplifier.2. The Main AC Power going to the C48 and anyother McIntosh Component(s) should not be applieduntil all the system components are connectedtogether. Failure to do so could result in malfunctioningof some or all of the system’s normal operations.When the C48 and other McIntosh Componentsare in their Standby Power Off Mode, theMicroprocessor’s Circuitry inside each componentis active and communication is occurring betweenthem.3. Balanced and Unbalanced Inputs and Outputs canbe mixed. For example, you may connect signalsources to Unbalanced Inputs and send signalsfrom the Balanced Outputs. You can also use Balancedand Unbalanced Outputs simultaneously,connected to different Power Amplifiers.4. The C48 internal Digital to Analog ConverterCircuitry is designed to decode 2-channel PCM(Pulse Code Modulation) Digital Signal present atthe Coaxial and Optical Digital Audio Inputs. OtherDigital Audio Signal Format Types will cause theAudio Outputs of the C48 to be muted and the FrontPanel Information Display will indicate an errormessage.5. The Remote Control Supplied with the C48 IntegratedAmplifier is capable of operating othercomponents. For additional information go to www.mcintoshlabs.com.6. When discarding the unit, comply withlocal rules or regulations. Batteries shouldnever be thrown away or incinerated butdisposed of in accordance with the localregulations concerning battery disposal.7. For additional information on the C48 and otherMcIntosh Products please visit the McIntosh WebSite at www.mcintoshlabs.com.Connector and Cable InformationXLR ConnectorsBelow is the Pin configuration for the XLR BalancedInput and Output Connectors on the C48. Refer to thediagrams for connections:PIN 1: Shield/GroundPIN 2: + OutputPIN 3: - OutputPIN 2 PIN 1PIN 3PIN 1 PIN 2PIN 3Power Control and Trigger ConnectorsThe C48 Power Control Out, Trigger and Pass-ThruOutput Jacks send Power On/ Output 1&2, Trig 1&2and Pass-ThruOff Signals (+12 volt/0 volt)when connected to otherPowerMcIntosh Components. An Controladditional connection is forMeterIlluminationcontrolling the illumination ofControlthe Power Output Meters onGroundMcIntosh Power Amplifiers. A1/8 inch stereo mini phone plug is used for connectionto the Power Control, Trigger and Pass-Thru Outputson the C48.Note: The Power Control, Trigger, Pass-Thru and DataConnecting Cable is available from the McIntoshParts Department:Power Control, Trigger, Pass-Thru and DataCable Part No. 170-202Six foot, shielded 2 conductor, with 1/8 inch stereomini phone plugs on each end.Data Port ConnectorsThe C48 Data Out Ports send Remote Control Signalsto Source Components. A 1/8inch stereo mini phone plug isused for connection.DataSignalN/CDataGround4