User manual MCINTOSH C27

[. . . ] THE McINTOSH C27 SOLID STATE STEREO PREAMPLIFIER Reading Time: 28 Minutes Price: $2-00 WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The Mclntosh you have purchased has a serial number located on the rear panel of the chassis. Record that serial number here for future references. The model and serial number are important to you for any future service. Your C 27 Stereo Preamplifier will give you many years of pleasant and satisfactory performance. If you have any questions, please contact: Contents SERVICE CONTRACT . [. . . ] The LOUDness control (the small center knob of the concentric control) provides low-frequency boost to compensate for a hearing characteristic of the human ear at low listening levels. The ear becomes less sensitive to low frequencies as volume is reduced. Increased loudness compensation is therefore desirable at lower listening levels. Press the latches on the side of the C 27 inward to permit the instrument to slide in or out of the cabinet. With the C 27 front panel flush with the cabinet panel, pressing the PANLOC buttons will lock the unit firmly in the cabinet. THE PUSHBUTTONS The C 27 is designed to be used with one or two tape recorders. The front panel pushbuttons permit normal playback of either recorder, monitor as recordings are being made on either recorder, or copying tapes from one recorder to another while listening to a separate program. TAPE MONITOR To monitor while recording from any source chosen on the INPUT SELECTOR, your tape recorder must have separate record and playback heads and separate electronics. The MONITOR switches let you monitor the quality of tape recordings made during the recording process. When the chosen TAPE MONITOR pushbutton is in the IN position the sound from the tape as it passes the playback head is heard a moment after it is recorded. The recording process continues as usual. When the switch is in the OUT position, the program that is being recorded is heard. The program source selection by the INPUT SELECTOR is fed to the power amplifiers and heard through the loudspeakers. The program source becomes the recorded tape on the recorder connected to TAPE 1 INPUT. The recorded program from tape recorder 1 is fed to the power amplifiers and heard from the loudspeakers. In the PUSHBUTTON IN position, a rectangle is lighted above the pushbutton. When the light is on only the tape will be heard. To listen to other sources the pushbutton must be out and the light off. TAPE 2 MONITOR A second tape recorder can be operated in the same manner using pushbutton TAPE 2 MONITOR. Use the front panel pushbutton TAPE 2 to playback from a tape recorder plugged into the rear panel TAPE 2 INPUT jacks. HOW TO COPY TAPE, TAPE COPY 1 -> 2 Put the tape to be copied on the recorder connected to TAPE 1 INPUT. Press in the TAPE COPY 1 -> 2 pushbutton. The signal available at the TAPE 2 OUTPUT jacks is the playback of TAPE 1. Record on the recorder connected to TAPE 2 OUTPUT. [. . . ] BALANCE CONTROL Rotating the BALANCE control to the left or right allows you to balance the level of the two channels. At the detented center position the gain of the two channels is equal. BASS AND TREBLE CONTROLS AND ASSOCIATED AMPLIFIER A high gain three stage linear amplifier is used in the bass and treble control circuits. Negative feedback reduces the gam to 6 dB when the controls are set flat. [. . . ]