User manual AKG HPA 4000

[. . . ] Operate the equipment with the supplied power supply with an output voltage of 12 VDC. Using adapters with an AC output and/or a different output voltage may cause serious damage to the unit. If any solid object or liquid penetrates into the equipment, shut down the sound system immediately. [. . . ] To save energy, disconnect the power supply from the power outlet if you will leave the equipment unused for a long period of time. When scrapping the equipment, separate the case, circuit boards, and cables, and dispose of all components in accordance with local waste disposal rules. To dispose of the packaging, make sure to use a collection/recycling system provided for that purpose and observe local legislation relating to waste disposal and recycling. This Manual contains important instructions for setting up and operating your equipment. Please take a few minutes to read the instructions below carefully before operating the equipment. The HPA 4000 is a headphone amplifier with eight stereo line inputs and one stereo output. It allows you to monitor the output signal of any one of eight SR 4000 receivers on headphones. You can use the HPA 4000 as a standalone unit or install it in a 19" rack using the supplied Rack Mounting Kit. 1 HPA 4000 headphone 1 in-line power supply amplifier (if checked on the packaging) Should anything be missing, please contact your AKG dealer. SOURCE 1-8: These blue LEDs indicate either the selected input channel of the current volume level. Turn all the way CW or CCW and release to increase or decrease the volume by one increment. After three seconds, only the SOURCE LED for the selected channel will remain lit. The next (previous) LED may therefore not be lit (extinguish) before you have notched up (down) the volume by several increments. Operate the equipment with the included power supply with an output voltage of 12 VDC only. Using adapters with an AC output and/or a different output voltage may cause serious damage to the unit. Prior to setting up the unit, check that the AC mains voltage stated on the included power supply is identical to the AC mains voltage available where you will use your system. [. . . ] To revert to the previous volume setting, turn the setup control all the way CW. The current settings will be stored in the EPROM and automatically loaded the next time you power up. Switch power to the unit off and disconnect the power supply from the power outlet. [. . . ]