User manual ART TUBE MP OPL

[. . . ] 3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Input Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 +20 dB Gain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Phantom Power +48V Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 9 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Do not remove the metal cover; there are no user-serviceable parts inside. Only use the power adapter that came with this unit or one obtained from Arts Customer Service Department. -3- CONTROLS & INDICATORS INPUT CONTROL The Input Control sets the amount of input gain of the Tube MP Studio V3TM. Turn the control clockwise to increase gain and counterclockwise to decrease gain. You may control two ranges of gain with this control, +26 to +60dB and +6 to +40dB. Selection of the gain range is made with the +20dB gain switch. +20DB GAIN SWITCH Use the +20dB Gain Switch to set the gain range of the input control. When the switch is out, the Tube MP Studio V3TM operates in Normal mode. This mode is indicated by the labeling in red and corresponds directly to the input control's red gain range labeling. For microphone applications, where more gain is needed, push the switch in. For hot line level inputs, set the switch in the out position. PHANTOM POWER +48V SWITCH The Tube MP Studio V3TM can power any microphone needing +48 volts DC Phantom power. Phantom power is supplied to pins 2 and 3 of the XLR Input jack when this switch is depressed. If OPLTM is not being used, then the LED will serve as a signal clip indicator. It will light red whenever the signal at the tube's output is about to clip. If the LED is constantly lit, reduce the signal level with the Input gain control, or Activate the OPLTM circuitry. When the OPLTM circuit is engaged, the LED will turn red whenever the output signal peaks exceed the limiter's threshold, at which point the limiter will reduce gain automatically, to prevent output clipping. VU METER The VU Meter gives an analog representation of the Tube MP Studio V3TM's output signal level. "0dB" on the meter represents +6dBu at the ¼" output jack and +12dBu at the XLR o utput jack. Besides showing the average analog level, it is sensitive to attack transients. When not using OPLTM, the VU Meter is a great indicator of how hard you are running the tube. It also helps in setting a consistent level as you change mics and instrument sources. -6- The VU Meter also reflects the impact of the OPLTM circuitry on the signal. For example, if the signal is "in the red" on the meter, the meter will reflect the attenuation of the signal when the OPLTM is activated, and the signal is brought out of the "red". OUTPUT CONTROL The Output Control sets the output level of the Tube MP Studio V3TM. Turning the control clockwise increases the level of the output signal. When setting the Output level control, refer to the VU Meter for an accurate level leaving the Tube MP Studio V3TM. -7- CONNECTIONS Despite the Tube MP Studio V3TM's sophistication, it is easy to interface the unit with a wide variety of equipment. [. . . ] Both balanced and unbalanced output connections may be used simultaneously. This is particularly useful when using the Tube MP Studio V3TM as a direct box for instruments or line level signals. Make sure that both pieces of equipment connected to the Tube MP Studio V3TM's outputs are connected to the same earth ground, beforehand, to avoid electrical shock. If you experience a grounding hum when using both output connectors (one to a console, one to an instrument amp) simultaneously, a ground loop may be the problem. [. . . ]