User manual AKG HEARO 999 AUDIOSPHERE DIGITAL TRANSMITTER MOUNTING DRAWING

[. . . ] Never place the equipment near heat sources such as radiators or electric heaters or expose it to direct sunlight, excessive dust, humidity, rain, temperatures below freezing, or impacts. Never use petroleum-based cleaners or paint thinners to clean the equipment. When scrapping the equipment, remove the batteries, separate the case, circuit boards, and cables, and dispose of all components in accordance with local waste disposal rules. In order to make optimum use of the benefits of your HEARO 999 AUDIOSPHERE, please take a few minutes to read the instructions below carefully before operating the equipment. [. . . ] You may use the HEARO 999 AUDIOSPHERE either free-standing or install it in a 19" rack using the optional RMU 60 rack mount kit. You can connect the HEARO 999 AUDIOSPHERE to any analog headphones output (mini jack or 1/4" jack), to the LINE or REC output of your amplifier, or to an optical or coaxial digital output. Before connecting the HEARO 999 AUDIOSPHERE to your audio source, switch power to your audio source OFF. Plug the red RCA connector (right channel) on the supplied RCA/jack cable into the red LINE IN RIGHT jack (14) and the white RCA connector (left channel) into the white LINE IN LEFT jack (14) on the HEARO rear panel. If the headphones output on your equipment is a 1/4" jack, plug the supplied mini jack to 1/4" adapter onto the mini jack. Before connecting the transmitter to your audio source, switch power to the audio source OFF. Use a stereo RCA cable (not supplied) to connect the white LINE OUT L or REC OUT L jack on your audio source to the white LINE IN LEFT jack (14) on the HEARO rear panel and the red LINE OUT R or REC OUT R jack to the red LINE IN RIGHT jack (14). Use an optional coaxial cable (mono RCA cable) to connect the coaxial output on your DVD or CD player, digital TV set, or other equipment to the COAXIAL jack (16) on the HEARO rear panel. If the DIGITAL IN switch (17) is IN, push it once to activate the coaxial input. Use the supplied fiber optical cable to connect the optical output on your DVD or CD player, digital TV set, or other equipment to the OPTICAL jack (18) on the HEARO rear panel. If the DIGITAL IN switch (17) is OUT, push it once to activate the optical input. You can connect each digital input to a digital audio source and use the DIGITAL IN switch (17) to toggle between the two audio sources. Use the supplied RCA cable to connect the white "TAPE IN", "AUX IN", or "PLAYBACK IN" jack on the amplifier to the white LINE OUT LEFT jack (15) and the red "TAPE IN" , "AUX IN", or "PLAYBACK IN" jack on the amplifier to the red LINE OUT RIGHT jack (15) on the HEARO rear panel. Refer to the operating manual of your amplifier for instructions on how to listen to and mute the signal at the TAPE", "AUX", or "PLAYBACK" input. In order to maintain interference-free listening pleasure, do not operate your HEARO 999 AUDIOSPHERE in the close vicinity of radio equipment, cellular telephones, or directly above TV or computer monitor picture tubes. The supplied connecting cables are long enough to allow the HEARO 999 AUDIOSPHERE to be placed at a safe distance from interference sources. Interference caused by other users of the same frequency band are beyond AKG's control. If you use the HEARO 999 AUDIOSPHERE with wireless headphones, you will first need to charge the batteries in the headphones, referring to the instruction manual that comes with your headphones. Use the INPUT control (3) on the HEARO front panel to set the input level such that the INPUT LED next to the INPUT control (3) will flicker green in step with the input signal or light green steadily, occasionally flashing red on extremely loud sounds. Turn the INPUT control (3) CCW just enough to stop the INPUT LED flashing red. If the DIGITAL LED (2) is dark, push the DIGITAL switch (8) to activate the digital inputs. If you connected your digital audio source to the COAXIAL jack (16), make sure the DIGITAL IN switch (17) is OUT. [. . . ] Use the EARS selector (10) to compare the ear matching curves on your shortlist with one another. Make a list of those ear curves where the signal most closely approximated a "point source" (a sound source of zero width). For this test, it makes no difference whether you perceive the signal inside or outside your head. The ear matching curve that provides the closest approximation to a point source is the one most congruent with the transfer function of your ears. [. . . ]