User manual MCINTOSH C2300

[. . . ] Tube Preamplifier C2300 Owner's Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 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. To prevent the risk of electric shock, do not remove cover or back. No user-serviceable parts inside. IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. 1. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] Record any changes made to the various inputs from the default settings in the "Input Source Settings" chart below. Rotate the SELECT 2 Control until the Front Panel Alphanumeric Display indicates "INPUT 7 AUX". Refer to figure 7. Figure 7 Input Source Settings Default Title New Title Trim Trigger 4. Press the SETUP Push-button to exit the Setup Mode. TUNER DVD D/A CD CDR SERVER MC PHONO MM PHONO Meter Illumination On/Off The Front Panel Meter Illumination may be switched On or Off. Rotate the SELECT 2 Control until the Front Panel Alphanumeric Display indicates "METER OFF". Press the SETUP Push-button to exit the Setup Mode. 12 Setup, con't Display Brightness The Front Panel Alphanumeric DISPLAY Brightness may be varied from a setting of 1 (Dim) to 7 (Bright). Rotate the SELECT 2 Control until the Front Panel Alphanumeric Display indicates "Display 3". Press the SETUP Push-button to exit the Setup Mode. cates "ACC< C > ON". Refer to figure 10. Figure 10 Tube LED Power Control Triggers The OUTPUT 1(A) and OUTPUT 2(B) Power Control Outputs are reassignable to activate only when a given Input is selected. In the following example, the Power Control OUTPUT 1(A) Jack will be set to function as TRIGGER A for the DVD Input. Rotate the MENU Control until "TRIG TUNER > - - " appears on the Front Panel Alphanumeric Display. Refer to figure 8. Figure 8 To swich Off the Tube LED green illumination perform the following: 1. Rotate the MENU Control until "TUBE LED ON" appears on the Front Panel Alphanumeric Display. Rotate the SELECT 2 Control until the display indicates "TUBE LED OFF". Press the SETUP Push-button to exit the Setup Mode. Passthru The C2300 can be part of a Multichannel Sound System for SACD, DVD-Audio and Home Theater. The Right and Left Front Channels from a McIntosh A/V Control Center or Surround Decoder can "Passthru" the C2300 and onto its associated Power Amplifier(s). The Setup Mode allows the activation of the Passthru Mode and the Selection of the C2300 Input (Input numbers 3 - 8 on the Rear Panel) that will be used for the Right and Left Front Channels. In the example below, the Right and Left Front Channels from the Multichannel Processor/Decoder will be connected to the CDR (7) Input Jacks on the C2300. Rotate the MENU Control until "PASSTHRU OFF" appears on the Front Panel Alphanumeric Display. Rotate the SELECT 2 Control until the display indicates "PASSTHRU 7 ". Rotate the SELECT 1 Control until the display indicates "TRIG DVD > - - ". Rotate the SELECT 2 Control until the display indicates "TRIG DVD > A ". [. . . ] So it is no surprise that McIntosh has devoted a substantial amount of time in pursuit of the "Perfect Volume Control System". Conventional Mechanical Controls have poor tracking especially when it comes to maintaining channel balance and after a period of time they tend to introduce noise into the audio signal, as they are rotated. The one desirable thing they have is the rate of change in volume for degrees of rotation, known as the audio taper. Using Electronic Circuitry for controlling the volume can be designed to be free from noise and maintain channel balance, however the audio taper produced by the typical Electronic Volume Technical Description Control Circuit is unacceptable for use in the C2300, as it does not match the classic McIntosh Volume Control Audio Taper. [. . . ]