ART PRO MPA II User's Manual

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PRO MPA II ™ ART PRO MPA II Microphone Preamplifier USER’S GUIDE ...

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II IMPORTANT SAFETY INSTRUCTIONS – READ FIRST This symbol, wherever it appears, This symbol, wherever it appears, alerts alerts you to the presence of uninsulated you to important operating and maintenance dangerous voltage inside t...

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III IMPORTANT SAFETY INSTRUCTIONS – READ FIRST ......................................................... II PRO MPA II OVERVIEW – FEATURES AND GENERAL INFORMATION:............................ 1 FRONT PANEL CONNECTIONS AND CONTROLS .............

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1 PRO MPA II OVERVIEW – FEATURES AND GENERAL INFORMATION : The ART PRO MPA II microphone preamplifier features a new low noise, high performance preampli- fication circuitry, designed for superior audio fidelity. Building upon the quality an...

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2 Figure 1 – Block Diagram ...

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3 FRONT PANEL CONNECTIONS AND CONTROLS Figure 2 – Front controls Input Gain control This control optimizes the input signal level before the tube gain is applied. Both Microphone and Instrument input gains remain the same and are affec...

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4 with the PRO MPA II ” for more detailed instructions on setting the Input Gain control for the best results. Input Impedance control This knob controls the Mic/line input amplifier impedance. This function allows variable voicing of any m...

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5 Phantom switch Phantom power on the microphone input is turned on and off with this switch. Depressing the switch will power condenser microphones and other 48volt phantom powered devices. Phantom power is supplied to pins 2 and 3 of the input...

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6 In the “Normal” (OUT) position, the tube distortion gradually rises until it smoothly clips. The tube is run almost completely open-loop in this mode, providing a musical tube “crunch” when overdriven with a natural recovery from clippi...

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7 In Stereo mode, CH1 output adjusts the output gain of both channels and CH2 output control acts as a power summed Balance control. There is a slight drop in output level in stereo mode when the Balance knob is centered vs. at one extreme or a...

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8 Rear Panel connections Figure 3 – Rear connections Balanced Inputs The PRO MPA II ’s XLR connectors follow the AES standard of Pin 1 = Ground, Pin 2 = Hot (+), Pin 3 = Cold (-). The Balanced inputs have an input impedance that is v...

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9 PRO MPA II OPERATING INSTRUCTIONS Obtaining the best noise performance with the PRO MPA II Start by turning down the Input Gain knob and centering the Analog Output knob. Use the analog meter to view the operating level by depressing t...

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10 We provide a continuously variable impedance control to allow you to fine-tune the voicing, finding the perfect interaction between microphone and pre-amp. Start by setting the centering the Input Impedance knob. This provides a 600-Ohm lo...

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11 Using the Mid/Side mode The PRO MPA II is designed for stereo operation using the Mid/Side switch and two microphones. One of the mics needs to have a figure-8 pickup pattern. Start by aligning two mics 90 degrees apart. Connect the mic f...

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12 WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology (A R T) warrants to the original purchas...

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13 SERVICE The following information is provided in the unlikely event that your unit requires service. 1) Be sure that the unit is the cause of the problem. Check to make sure the unit has power, all cables are connected correctly, an...

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14 PRO MPA II SPECIFICATIONS Frequency Response............................ 15Hz to 48 kHz (+0, -1dB) @ normal plate voltage 15Hz to 120 kHz (+0, -1dB) @ high plate voltage Dynamic range:..................................... >110dB (�...

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15 NOTES: ...

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16 ...

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17 www.artproaudio.com E-mail: [email protected] PRO MPA II – Microphone Preamplifier 214-5004-201h ...