User manual MCINTOSH C48

[. . . ] McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www. mcintoshlabs. com C48 Audio Preamplifier Owner's Manual The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. [. . . ] At this time the LED McIntosh C48 V1. 00 - 1. 0 Figure 2 above the TRIM Push-button will be illuminated. Press the OUTPUT 2 / MENU Push-button to select the next Setup Mode Menu item, "SETUP: SORCE INPUT, TUNER : RCA". With each additional press of the OUTPUT 2 / MENU Notes: 1. Any one of the Default Inputs may be swiched Off. If any input is switched Off its name will no longer appear on the Front Panel Information Display when using the INPUT Control, nor is it accessible with the Remote Control. The Phono MC (Moving Coil) and MM (Moving Magnet) Input are designed for connection of a turntable only and thus non-reassignable. However, the Phono Inputs may be switched Off. Only one Input may be assigned at a time to a Balanced (1 & 2) or Digital (1 thru 4) Connector. If an already assigned Balanced or Digital connector is to be reassigned to a different Input, the Input currently assigned to the connector first needs to be changed. It can be set to a RCA connector or to another available Balanced or Digital connector. 13 Reassign Source Inputs, con't 1. Press and hold the EQ BYPASS/SETUP Pushbutton until the Setup Mode is active. Then press the OUTPUT 2 / MENU Push-button to select the Setup Menu item "SETUP: SOURCE INPUT, TUNER :RCA". Rotate the VOLUME/ADJUST Control until "SRVR : DIGITAL 1" appears on the Front Panel Information Display. Record Input Level Adjustment Source Components can have slightly different volume levels resulting in the need to readjust the C48 Volume Control when switching between different sources. The C48 allows the adjustment of levels for each of the Source Inputs for the same relative volume. The CD and SERVER Inputs are used in the following example. SETUP: SOURCE INPUT TUNER : RCA Figure 4 SETUP: SOURCE INPUT SRVR : DIGITAL 1 Figure 8 2. Rotate the INPUT Control until "CD2 : RCA" appears on the Front Panel Information Display. Refer to figure 5. any changes made to the various inputs from the default settings in the "Input and Power Control Settings" chart for future reference. To exit from the Setup Mode, press the EQ BYPASS/SETUP Push-button. SETUP: SOURCE INPUT CD2 : RCA Figure 5 3. Rotate the VOLUME/ADJUST Control until "CD2 : BALANCED 1" appears on the Front Panel Information Display. Refer to figure 6. SETUP: SOURCE INPUT CD2 : BALANCED 1 Figure 6 1. Rotate the INPUT Control to select the CD Input and adjust the VOLUME Control to the desired listening level. [. . . ] The other of the Front Panel Controls and Push-buttons are deactivated as long as the Passthru Mode is active Optical and Digital Inputs When a Digital Input (Optical or Coxial Connection) on the C48 is selected the Front Panel Information Display will indicate when a signal is present "2CH 22 30Hz 125Hz 500Hz 2kHz 10kHz How to Operate the C48, con't PCM". During the time there is no SOURCE: CD 15% 2CH PCM Figure 70 The C48 Preamplifier Front Panel Information Display will indicate the Bit and Sampling Rate of the incoming digital signal. Refer to figure 72. FACTORY RESET -COMPLETE2. Press the STANDBY/ON Push-button and the C48 will resume operation. Figure 74 Digital Signal present the display will indicate "SILENT". [. . . ]