HP Armada 7300 Armada 7300 Family of Personal Computers Reference Guide - Page 93
Connecting External Audio Equipment - power supply
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Connecting External Audio Equipment Stereo Line-In Jack The stereo line-in jack is the input line for an external stereo player such as a CD player, stereo tuner, or tape deck. The input device must have a 3.5-mm stereo plug and must supply line input levels of 0.5 to 4.25 volts. The line output of most stereo players meets this specification. CAUTION: Use only a 3.5 mm stereo plug in the stereo line-in jack. A monaural plug in the stereo line-in jack may damage the input device. Stereo Speaker/Headphone Jack The stereo speaker/headphone jack supports stereo speakers, headphones, or a headset. You can connect external speakers to provide more separation for the left and right audio channels, more volume, and higher quality sound. Use only a 3.5-mm stereo plug. For best sound quality, headphones should be 32 ohms, and external speakers should be a minimum of 8 ohms. ! WARNING: To reduce the risk of personal injury, turn down the volume control before putting on headphones. CAUTION: Use only a 3.5-mm stereo plug in the stereo speaker/ headphone jack. A monaural plug in the stereo speaker/headphone jack may damage the computer. Microphone Jack The microphone jack supports a monaural microphone with a 3.5-mm plug. A powered electret condenser microphone is recommended. Other types of microphones, such as stereo or dynamic, are not recommended. A stereo microphone will record the left channel on both the left and right channels. A dynamic microphone does not have the recommended sensitivity. 11-4 Using Audio Features
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