Harman Kardon 900 Owners Manual - Page 10

If my voice does not appear through the four channels correctly, check to see that all switches and controls on your equipment are in their correct positions, and go through this adjustment procedure again. In some cases you may find your adjustment will result in an imbalance of left and right signals, sometimes outside of the ability of your balance controls to correct. This is especially true if your adjustment results in the SEPARATION CONTROLS being set at or very near their extreme minimum (counterclockwise) or maximum (clockwise) positions. If this is true, use the reference markings on your unit as a guide. The SEPARATION CONTROLS also act as gain controls for the phonograph section if you use a stereo cartridge. You may adjust these controls to match the volume of your phonograph playback with that of your FM section. Do not use the controls at or near their maximum settings with a stereo cartridge. Using a stereo cartridge with the controls set at maximum could result in distorted sound. During adjustment, output in the back channels is actually front channel signal leakage that should be minimized. Complete isolation may not be possible so some leakage may be present. This is a normal condition. These separation controls may also be used as input level controls when using a conventional stereo phonograph pickup. In this case, set the level of your phonograph signal to be approximately equal to the signal level of your FM tuner. FRONT PANEL SWITCHES AND CONTROLS POWER SWITCH The POWER switch performs the function as its name denotes. It supplies power to the receiver. When the pushbutton is depressed to turn the set ON the power light will illuminate. HEADPHONE JACKS The stereo or 4-channel headphone receptacles located on the front panel of your receiver will accept any type of headphone. Stereo phones come with a single plug which should be connected to the FRONT receptacle. 4-channel phones come with two plugs. Connect the front plug to the FRONT receptacle and the back plug to the BACK receptacle. The headphone receptacles are "ON" at all times. To listen only to your phones without having your speakers on, merely set the SPEAKER switches on the front row of pushbuttons to "OFF". MAIN SPEAKER SWITCH In order to hear the speakers connected to your main system, the respective FRONT and BACK MAIN speaker switches must be depressed. When in the "ON" position all speakers connected to the main system are "ON". Should you desire to listen to stereo or 4-channel headphones alone, the speakers can be turned off at your discretion. REMOTE SPEAKER SWITCH In order to hear all of the speakers connected to your remote system, the respective FRONT and BACK REMOTE speaker switches must be depressed. When in the "ON" position all speakers connected to the remote system are "ON". Should you desire to listen to stereo or 4-channel headphones alone, the speakers can be turned off at your discretion. EXT DOLBY NR/TAPE MON 2 SWITCH When an FM station broadcasts a ❑olby encoded program, it may be decoded by use of an external Dolby processor. If you use an external processor, the Dolby switch when depressed, will decode an encoded program. If the Dolby button is depressed without an external processor connected, you will get no sound from your speaker system. Dolby IN receptacles may be used as a 2-channel Tape Monitor provided you are not using the Dolby Function. TAPE MON 1 SWITCH If your 4-channel tape recorder has a special monitoring feature, depressing this switch "IN" will permit you to monitor your tapes a split second after they are recorded. When not in use this switch must be in the "OUT" position, otherwise it will defeat the output of the receiver. This switch and associated rear panel receptacles can also be used as an additional set of stereo or 4-channel high level inputs. CONTOUR SWITCH One of the limitations of human hearing is its tendency to lose sensitivity to the very low pitched sounds as the program sound level is reduced. It is this characteristic (known as the Fletcher-Munson effect) which causes one to play music programs at high listening levels in order to experience the full, rich sound available from fine modern recordings. The Harman/Kardon CONTOUR switch compensates for this effect, thereby eliminating high listening levels as a requisite for full enjoyment of reproduced music. For rich, full-bodied reproduction at low listening levels, throw the CONTOUR switch to the IN position. At high listening levels, the CONTOUR switch has no effect. FM MUTING SWITCH The purpose of the muting circuit is to reduce audible noise when tuning from station to station. Since very weak signals may be muted at the same time, the front panel FM MUTING switch may be used to defeat the muting effect on weak signals. To reduce interstation noise, push the MUTING switch "ON". To defeat the circuit, push the switch "OFF". 9