HP TouchSmart 9100 User Guide - Page 28
Sound Options, Connecting analog speakers - power supply
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Sound Options Your HP TouchSmart 9100 Business PC supports the following speaker options: Built-in analog stereo speakers Analog 2.0 or 2.1 powered speakers Digital 3.1, 4.1, or 5.1 powered speakers Audio receiver Headphones NOTES: The HP TouchSmart 9100 Business PC supports powered speaker systems only. Powered speakers require a separate power supply. When the Audio Line In connector is being used, the following are affected: the output to the internal speakers, the Audio Line Out connector, and the headphones connector. For example, if you are playing sound through your internal speakers and then you connect an MP3 device through your Audio Line In connector, you will hear both sounds. By default, the internal speakers are on, and the digital speakers are off. Connecting analog speakers For 2.0 powered speakers, connect the speaker cable to the Audio Line Out connector on the back of the computer behind the connector cover. For 2.1 powered speakers, connect the Audio Line Out connector on the back of the computer behind the connector cover to the subwoofer, and then connect the left and right speakers to the subwoofer. Turn on the computer and then the speaker system. If necessary, refer to the documentation that came with your speakers. NOTE: When an Audio Line Out connector (such as headphones or external speakers) is connected, the internal speakers are muted. Connecting and enabling digital speakers or an audio receiver Connect 3.1, 4.1, or 5.1 digital speakers or an audio receiver to the SPDIF out (orange) connector on the back of the computer behind the connector cover, and then use the following procedure to enable the speakers or audio receiver. If necessary, refer to the instructions that came with your speakers or audio receiver. NOTE: When SPDIF is connected: You can switch to the internal speakers without unplugging the SPDIF device. The Volume + and Volume - and Mute buttons do not control the SPDIF device. Control SPDIF device volume with its own controls. To enable digital speakers or an audio receiver, use the Realtek HD Audio Manager software that came with the computer. 1 Tap the Realtek HD Audio Manager icon on the taskbar. 2 Tap the Volume button. 22 User Guide (Features may vary by model)