Harman Kardon HK330A Owners Manual - Page 3
Installation, Procedure
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INSTALLATION PROCEDURE VENTILATION SPEAKER PHASING Although your new Receiver rarely develops high heat, it is still recommended that you leave the back of the cabinet open. If this is not possible, provide several large holes or slots as low down and as high up in the cabinet back as possible. As an alternative, holes may be provided in the sides, bottom or top of the cabinet. Remember that really effective ventilation requires provision for cool air to enter at the bottom and hot air to leave at the top. A min€mum clearance of two (2) inches should be allowed on each side and in the rear, between the chassis and the cabinet, and three (3) inches are required above it. Isolate any accessories which might interfere with ventilation. For example, do not drape plastic or rubber covered interconnecting cable over the equipment. The rear panel surface of your receiver has been designed as a heat dissipating device for the output transistors. This area will become warm under normal use and should not be cause for concern. POWER REQUIREMENTS Connect the AC line cord to any outlet furnishing 117 volts, 60 cycle AC current. The voltage may vary between 105 and 125 volts. An auxiliary AC power outlet is provided on the rear panel of your receiver. Any accessory equipment (tape recorder, phonograph record player, etc.) may be connected to this receptacle and will be controlled by the POWER switch on the front panel. When more than one speaker is used in a music reproducing system, the speakers must be connected in a manner which will allow them to work together. Both left and right speakers must operate in perfect unison, moving back and forth together. If the speakers are moving in opposite directions, the result will be diminished bass response and decreased realism of sound. When this occurs, the speakers are said to be out of phase. Checking for proper phase and correcting, if required, is quite simple. 1. After connecting your speakers, place the stereo receiver in the A B or monophonic mode of operation. 2. Play a record tape, or FM broadcast which has a single speaking or singing voice, or a solo instrument. 3. The voice or instrument should appear to be coming from an area directly between the two speakers. If the speakers are out of phase, the sound wi€l appear to be coming from the two individual speakers. 4. If you determine that the speakers are out of phase, simply disconnect the leads from only one of the speakers and reverse them. The system wil€ then be in phase. This completes your speaker connections. Your receiver is a solid state device which does not contain audio output transformers. It is therefore not necessary to match the impedance of your speakers to the receiver. Your unit will perform perfectly with any speaker which has an impedance of 4, 8 or 16 ohms. 2
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