C48 Audio Preamplifier Owner's Manual - McIntosh

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Front Panel Displays, Controls, Push-buttons and JackIR Sensor receivescommands from aRemote ControlEQUALIZER Controls increaseor decrease the volume levels atthe Center Frequencies of 30Hz,125Hz, 500Hz, 2,000Hz, and10,000HzINPUT Control allowsthe selection ofvarious sources forlistening and recordingVOLUME Controlallows adjustmentof the listening levelfor both channelsConnection for lowimpedance dynamicheadphones, forprivate listeningSTANDBY/ONPush-button withindicator, switchesthe C48 ON or OFF(Standby) and resetsthe microprocessorsMONO with indicator,combines the Left andRight Channel signals forMonophonic SoundEQualizer BYPASSPush-button with indicator,when activated theaudio signal bypasses theEqualizer Controls, alsoused to enter and exit theSetup ModeTRIM Push-buttonwith indicator, allowsselection of varioustypes of settingsINFORMATION DISPLAYindicates the Sources, Volume,other Audio Settings,Operational Functions andSetup Mode SettingsMUTE Push-buttonmutes the audio fromthe Loudspeakers andHeadphonesOUTPUT 1 and 2Push-buttons withindicators, switch thePreamplifier Outputs1 and 2 On or Off12
SetupHow to Operate the Setup ModeYour McIntosh C48 has been factory configured fordefault operating settings that will allow immediateenjoyment of superb audio without the need for furtheradjustments. If you wish to make changes to thefactory default settings, a Setup Feature is provided tocustomize the operating settings using the Front PanelInformation Display. Refer to the C48 Front PanelIllustration on the previous page while performing thefollowing steps.Note: If the C48 is currently On, proceed to step 2.1. Press the STANDBY/ON Push-button on the FrontPanel or press the (Power) Push-button on theRemote Control to switch On the C48. The C48will go through a brief startup intialization withthe Front Panel Information Display indicating thelast used source and volume setting, this is followedby the volume setting indication starting atzero and then increasing to the last used volumesetting. Refer to figure 1.SOURCE: TUNER15%Figure 12. Press and hold the EQ BYPASS/SETUP Pushbuttonuntil the Front Panel Information Displayindicates “McIntosh C48, V1.00 - 1.0 or higherFirmware. Refer to figure 2. At this time the LEDMcIntosh C48V1.00 - 1.0Figure 2above the TRIM Push-button will be illuminated.3. Press the OUTPUT 2 / MENU ► Push-button toselect the next Setup Mode Menu item, “SETUP:SORCE INPUT, TUNER : RCA”. With eachadditional press of the OUTPUT 2 / MENU ►Push-button the Setup Menu will advance to thenext Menu Selection. Refer to figure 3.4. To exit from the Setup Mode, press the EQ BY-PASS/SETUP Push-button. The LED above theTRIM Push-button will extinguish and the FrontPanel Display will revert back to its normal display.Refer to figure 1.Default SettingsThe Default Settings Chart below indicates the FunctionName, Default Setting and the Page Number foradditional information.Default SettingsFunction Name Setting Page No.McIntosh C48 V_._ _ - _._ 13SOURCE INPUT(connector type)LEVEL(Trim)DISPLAY (Brightness)RCA 130.0dB 143 15PASSTHRU OFF 15TRIG 1 Output(Action)TRIG 2 Output(Action)COMM PORT(Baud Rate)REMOTE(Codes)SETUP: SOURCE INPUTTUNER : RCAFigure 3MAIN 16MAIN 16115200 17NORM 17Firmware VersionThe C48 functionality is controlled by internal softwarethat is know as Firmware. The Version of theFirmware in the C48 can be identified at any time byutilizing the Setup Mode.1. Press and hold the C48 Front Panel EQ BYPASS/SETUP Push-button to enter the Setup Mode.2. The number after the character “V” is the Firmwarenumber. Refer to figure 2.3. To exit the Setup Mode, press the EQ BYPASS/SETUP Push-button.Source Inputs ReassignmentThe C48 provides the ability to reassign the non-Phono Inputs (High Level) to either one of two BalancedInputs or one of the four Digital Inputs.In the first example, the CD2 Input will be reassignedfrom the unbalanced CD2 (RCA Jacks) to the BAL-ANCED 1 (XRL Connector).Notes: 1. Any one of the Default Inputs may be swichedOff. If any input is switched Off its name willno longer appear on the Front Panel InformationDisplay when using the INPUT Control,nor is it accessible with the Remote Control.2. The Phono MC (Moving Coil) and MM (MovingMagnet) Input are designed for connectionof a turntable only and thus non-reassignable.However, the Phono Inputs may be switchedOff.3. Only one Input may be assigned at a time to aBalanced (1 & 2) or Digital (1 thru 4) Connector.If an already assigned Balanced or Digitalconnector is to be reassigned to a differentInput, the Input currently assigned to the connectorfirst needs to be changed. It can be setto a RCA connector or to another availableBalanced or Digital connector.13
Page 1 and 2: McIntosh Laboratory, Inc. 2 Chamber
Page 3 and 4: Thank YouYour decision to own this
Page 5 and 6: Introduction and Performance Featur
Page 7 and 8: InstallationInstallationThe C48 can
Page 9 and 10: Connecting ComponentsConnecting Com
Page 11: How to use the Remote ControlHow to
Page 15 and 16: Setup, con’t4. Rotate the INPUT C
Page 17 and 18: Setup, con’tComm Port Baud RateTh
Page 19 and 20: How to Operate the C48ance perform
Page 22: How to Operate the C48, con’tThe
Page 26 and 27: SpecificationsSpecificationsFrequen

C48 Audio Preamplifier Owner's Manual - McIntosh

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