Harman Kardon HK230A Owners Manual - Page 10
Operating, Procedure
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OPERATING PROCEDURE Every control on this receiver serves a specific useful function and is important for the proper operation of your stereo system. We recommend that you read the following section carefully so you may take full advantage of the performance capabilities of your receiver. BALANCE CONTROL The balance control is used to adjust the sound level of each channel in relation to the other. The nature of stereophonic reproduction is such that it requires two identical channels to obtain the optimum stereo effect. As there may be slight differences in the location of the two speakers, tape heads, cartridges, etc., the balance control is provided to permit re-balancing of the overall system even in cases where extreme unbalance exists. It should be noted that the Balance control may be set anywhere within its range of adjustment to attain system balance. VOLUME CONTROL The Volume control is used to adjust the volume level of any program material fed into the stereo system. The control varies both channels simultaneously therefore eliminating the necessity of balancing your system each time you change the volume level. BASS AND TREBLE CONTROLS The BASS and TREBLE controls on your receiver provide the full range of tonal adjustment necessary for stereo high fidelity listening. The tone control range is considerable and can adequately adjust the low and high frequencies in accordance with your listening preference, speaker characteristics and room acoustics. FUNCTION SELECTOR SWITCH The Function selector switch selects the desired type of program source to be heard through your system. 1. AM: This position selects the AM section of your receiver for AM reception. 2. FM: Selects the FM section of your receiver. In this position you can listen to stereophonic broadcasts monophonically while monophonic broadcasts will appear unchanged. 3. FM STEREO: This is the normal listening position for all monophonic or stereophonic FM broadcasts. In this position the stereo indicator light and automatic switching circuit built into your receiver are operative. For further details see the paragraph on STEREO INDICATOR LIGHT and SELECTING MONOPHONIC OR STEREO FM BROADCASTS. 4. PHONO: Selects your record player for stereophonic operation. 5. TAPE AMP/AUX: Selects any program source such as tape recorder, the output of your television set, or any other high level equipment connected to the TAPE AMP/AUX receptacles on the rear of your receiver. POWER SWITCH Be sure to turn this switch off when not using the receiver. SPEAKER SYSTEM SELECTOR SWITCH Your receiver has been provided with a Speaker Selector Switch to permit you to select either Speaker System 1 or Speaker System 2 mode of operation. You may not play Speaker System 1 and Speaker System 2 simultaneously. STEREO-MONO SWITCH When the switch is in the STEREO position the receiver is operating stereophonically. When the switch is in the MONO position, the receiver is operating monophonically. This position may be used when listening to monophonic records or any single channel program source through both speakers. SOURCE/MONITOR SWITCH If your tape recorder has a special monitoring feature, throwing the tape monitor switch to the MONITOR position will enable you to listen to your tapes a second after they are recorded. When not in use, this switch must be in the SOURCE position. If your tape recorder does not have any monitoring feature, throwing this switch will result in zero output from your speaker system. 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 tone 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 warm, full-bodied reproduction at low listening levels, throw the CONTOUR switch to the CONTOUR position. At high levels, the CONTOUR switch has no effect. 9
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