User manual AKG HT 4500

[. . . ] Do not expose the equipment to direct sunlight, excessive dust, moisture, rain, mechanical vibrations, or shock. Be sure to dispose of used batteries as required by local waste disposal rules. 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. Dispose of the packaging in an appropriate container provided by the local waste collection/recycling entity and observe all local legislation relating to waste disposal and recycling. [. . . ] As soon as the below screen appears on the display (2), the transmitter is in LOCK mode. The "LOCK" label indicates that all controls except for the MUTE switch are electronically locked to prevent misadjustment. Push and hold the ON/OFF button (3) until the message "oFF" appears on the display (2). â· If you are not sure as to what carrier frequency the transmitter is tuned to, place the transmitter into SILENT mode following steps 1 and 2 below. In SILENT mode, you can check and adjust the carrier frequency and input gain without transmitting a radio signal. Push and hold the setup switch until the display backlighting comes on. The display will first show the battery capacityin hours and as a bargraph and then the currently selected carrier frequency in MHz. The transmitter is now in SILENT mode and the display shows the Preset menu. You can either select one of the Preset Channels from the Preset menu (section 3. The spacing between Preset frequencies prevents any mutual interference. Carrier frequencies are also called "Channels" whose numbers are indicated below the "CH" label. The spacing between these frequencies is wide enough to prevent any mutual interference (intermodulation). They save time because you do not need to calculate your own carrier frequencies and help you avoid intermodulation problems. Each Preset has a one or two-character "NAME" relating to the country where the respective carrier frequencies are allocated (e. When designing a multichannel system, make sure to use Channels within the same Group only. Using Channels of different Presets and/or Groups simultaneously may cause intermodulation. â· Some Presets may be approved in more than one country. To check which Frequency Group(s) is (are) approved in your country, visit www. If no Preset has been stored in memory, the 2nd line of the display shows "-- -- --". To select the next Preset, turn the setup switch briefly to the right. To select the next higher Frequency Group number, turn the setup switch briefly to the right. To select the next lower Frequency Group number, turn the setup switch briefly to the left. [. . . ] Feedback means that part of the sound projected by a speaker is picked up by a microphone, fed to the amplifier, and projected again by the speaker. Above a specific volume or system gain setting called the feedback threshold, the signal starts being regenerated indefinitely, making the sound system howl and the sound engineer desperately dive for the master fader to reduce the volume and stop the howling. â· To increase usable gain before feedback, place the main ("FOH") speakers in front of the microphones (along the front edge of the stage). â· If you use monitor speakers, be sure never to point any microphone directly at the monitors. [. . . ]