[. . . ] The apparatus shall be disconnected from the mains by placing the power/standby switch in the standby position and unplugging the power cord of the apparatus from the AC mains receptacle. The socket-outlet shall be installed near the equipment and shall be easily accessible. Thank you for purchasing the G51 Surround Sound Speaker System from Logitech®. The G51 speaker system will add a new level to your gaming experience. [. . . ] Plug the subwoofer's power cord into an electrical outlet and power on the system by depressing the power/standby button. Access these controls on the precision control center: System Volume While idle, this knob adjusts the overall system volume. Level This button allows you to adjust the following levels: system volume, subwoofer volume, rear volume, and center channel volume. Press the level button to scroll through the options and use the system volume knob to adjust the levels. Matrix Surround Sound Toggles between Matrix gaming mode, Matrix music mode and off. 1 surround sound from 2-channel stereo sources like music and video game consoles. Headphone/Headset Jacks If using only headphones, plug the headphone jack into the headphone connector on the precision control center. When headphones are plugged into the G51 system, the speakers will mute automatically for private listening. If using a headset, plug the headphone jack into the headphone connector and the microphone jack into the microphone connector on the precision control center. When headphones are plugged in, the audio will mute in the headphones. Note: When using headphones to listen to a surround sound game or movie only the front left and right audio signals can be heard. To mix all 6 channels into the headphones, you will need to change your audio output to 2-channel stereo in your game or movie application. The G51 speakers support Dolby® Digital and DTS® sound on your PC if your 6-channel or greater sound card or DVD software can decode a Dolby® Digital or DTS® soundtrack. The center channel speaker can be mounted on top of a flat-panel LCD monitor. Swivel the center channel base back and make sure the lip under the front of the speaker is touching the front of the LCD monitor. Then, swivel the base back until it is touching the back of the LCD monitor and tighten the hinge screw for a secure fit (do not over-tighten). Then, swivel the satellite base to desired position and reinsert the screw on the bottom of the speaker stand (do not over-tighten). Use the notch on the base of the stand to hang your speaker on appropriate wall anchors. Precision control center: ­ Non-skid silicone feet ­ Master volume control ­ Subwoofer, center & surround level controls ­ Matrix surround sound music and gaming modes ­ Independent audio and microphone mute controls ­ Headset jack (microphone + headphone) · Logitech warrants that your Logitech hardware product shall be free from defects in material and workmanship for two (2) years, beginning from the date of purchase. Except where prohibited by applicable law, this warranty is nontransferable and is limited to the original purchaser. [. . . ] Except to the extent prohibited by applicable law, any implied warranty or condition of merchantability or fitness for a particular purpose on this hardware product is limited in duration to the duration of the applicable limited warranty period for your product. Some jurisdictions do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. Consumers have legal rights under applicable national legislation governing the sale of consumer goods. Such rights are not affected by the warranties in this Limited Warranty. [. . . ]