User manual AKG PERCEPTION 820 TUBE

[. . . ] Disconnect the equipment from power immediately and have the equipment checked by AKG service personnel. If you will not use the equipment for a long period of time, disconnect the equipment from power. Please note that the equipment will not be fully isolated from power when you set the power switch to OFF. Make sure to route power supply cords so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the equipment. [. . . ] The bass cut filter also minimizes the proximity effect that closein miking from less than 4 inches causes in any unidirectional microphone. E POWER switch: Turns power to the unit ON (position "I") and OFF (position "0"). The front panel POWER LED is lit while power is ON and goes out when you turn power to the unit OFF. F AC input: Standard IEC power receptacle with integrated fuse holder. To avoid damage, always make sure that the power voltage selector is set to the same voltage as the power voltage available where you are going to use the unit. J GROUND LIFT: This pushbutton switch allows you to remove hum caused by ground loops. To avoid damage or electric shock, mount the microphone on a suitable stand and make all audio connections before connecting the Remote Control Unit to power. Use a standard balanced XLR cable (C) (optional) to connect the OUTPUT connector (D) on the Remote Control Unit rear panel to the desired microphone input on your mixer. Prior to connecting the Remote Control Unit to power, check what power voltage is available where you are going to use the microphone. Set the power voltage selector (G) on the rear panel to the correct position as shown in Table 1 below. Referring to Table 1 above, use the correct power cord to connect the Remote Control Unit to a grounded power outlet. When on tour, you may encounter power outlets that do not match the power plug on any of the supplied power cords. Purchase a suitable power cord locally that complies with IEC and local safety standards and has a power plug with a chassis ground pin. After about ten seconds, the heating voltage will have reached the specified level and the front panel POWER LED will be lit. You may not get the full splendor of the tube sound before the electrodes have reached the required operating temperature. Therefore, we recommend powering up at least PERCEPTION 820 TUBE Five minutes before starting to record. This will allow the tube inside the microphone to heat up properly, 3. Wait for five minutes to allow the tube to cool down to room temperature before moving the microphone. A hot tube will be more susceptible to mechanical damage than a cold one. It will add the typical warmth and richness tube microphones are famous for to female and male voices as well as many instruments. The following sections contain general hints on using the microphone and suggestions on how to place the microphone for voices and various instruments. Please remember that vacuum tubes with their heater filaments are more delicate than solid-state components. [. . . ] Place two PERCEPTION 820 TUBEs about 31 inches to 4 feet (80 to 120 cm) above the drummer's head. This technique will pick up the entire kit, delivering a highly natural sound. Cymbals: To record cymbals on a separate track, consider this technique: · Place the microphone about 20 inches above and halfway between the crash and ride cymbals. To avoid electric shock, make sure to disconnect the Remote Control Unit from power before cleaning the microphone or the Remote Control Unit. [. . . ]