Art MPA Gold User Manual

Art MPA Gold User Manual

Art mpa gold pre amplifiers: user guide
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TABLE OF CONTENTS

Introduction ............................................................................................ 3
Introduction .......................................................................................... 3
Features ............................................................................................... 3
Front Panel Controls ...............................................................................4
Input Gain Control................................................................................ 4
Input Impedance Control ..................................................................... 5
Analog Output Control ......................................................................... 5
HPF Control ........................................................................................ 5
Gain Switch.......................................................................................... 5
Phantom Switch ...................................................................................6
Phase Switch ...................................................................................... 6
Plate Voltage Switch ............................................................................ 6
Meter Switch ........................................................................................ 7
Tube Warmth Meter ............................................................................. 7
Front Panel Connections.........................................................................8
Instrument Inputs ................................................................................. 8
Rear Panel Connections ......................................................................... 8
Balanced Inputs ................................................................................... 8
Balanced Outputs ............................................................................... 8
Signal Path ...............................................................................................9
Signal Path Flow Diagram ....................................................................9
Signal Path Flow .................................................................................10
Operating Instructions ......................................................................... 10
Obtaining the best noise performance ............................................... 10
Adjusting the input impedance ........................................................... 10
Setting the tube plate voltage ............................................................ 11
Warranty Information ........................................................................... 12
Service .................................................................................................. 12
Specifications ....................................................................................... 13
ART MPA Gold™ Microphone Preamplifier
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Summary of Contents for Art MPA Gold

  • Page 1: Table Of Contents

    ART MPA Gold™ Microphone Preamplifier TABLE OF CONTENTS Introduction ... 3 Introduction ... 3 Features ... 3 Front Panel Controls ...4 Input Gain Control... 4 Input Impedance Control ... 5 Analog Output Control ... 5 HPF Control ... 5 Gain Switch... 5 Phantom Switch ...6...
  • Page 2: Introduction

    Pro MPA, ART engineers set out to develop the next generation of professional microphone preamplifier. The MPA Gold is the culmination of years of research and development, and sets a new standard for quality and value. Professional features and spectacular tone are what make the MPA Gold a world-class microphone preamplifier.
  • Page 3: Front Panel Controls

    ART MPA Gold™ Microphone Preamplifier FRONT PANEL 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 affected by this adjustment. Input gain can be adjusted from 0dB (for line level signals) to 45dB of gain.
  • Page 4: Input Impedance Control

    Running most of the gain on the input generally provides the best performance of the MPA Gold. Refer to the section titled “Obtaining the best noise performance with the MPA Gold” for more detailed instructions on setting the Input Gain control for the best results.
  • Page 5: Phantom Switch

    2) Although the 48volt phantom power ramps up and down slowly it may still create a pop. Mute the output of the MPA Gold when engaging or disengaging phantom power to prevent damage to equipment following the MPA Gold.
  • Page 6: Meter Switch

    ART MPA Gold™ Microphone Preamplifier 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 clipping. The tube section can be more easily overdriven when the gain switch is in.
  • Page 7: Rear Panel Connections

    When you plug into this jack it DISABLES the balanced input on the rear of the unit. This feature allows you to keep the rear input patched in, and use the instrument input to switch to a different source. The instrument input allows the MPA Gold to serve as a great DI device as well.
  • Page 8: Signal Path

    MPA GOLD SIGNAL FLOW SIGNAL PATH FLOW The signal path of the MPA Gold consists of a discrete class A microphone pre-amp followed by a Hi Pass Filter, a balanced differential tube circuit with a 20dB Gain switch and then the phase switch. The tube warmth meter monitors the tube circuit output. At this point the signal passes to the analog output.
  • Page 9: Signal Path Flow

    ART MPA Gold™ Microphone Preamplifier MPA GOLD OPERATING INSTRUCTIONS Obtaining the best noise performance with the MPA GOLD 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 the switch under the center of the analog meter.
  • Page 10: Setting The Tube Plate Voltage

    Setting the Tube Plate Voltage The MPA Gold allows the user to select between one of two vastly different tube bias settings and power supply levels. The transition between either setting is smooth and quiet and the gain variation is minimal.
  • Page 11: Warranty Information

    ART MPA Gold™ Microphone Preamplifier 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 purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period of five years from the date of purchase.
  • Page 12: Service

    ART MPA Gold™ Microphone Preamplifier 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 supplied, all cables are connected correctly, and the cables themselves are in working condition.
  • Page 13: Specifications

    ROCHESTER, NEW YORK 14608 USA Phone (585) 436-2720 (585) 436-3942 – Fax www.artproaudio.com e-mail: cserve@artproaudio.com MPA GOLD –Tube Microphone Preamplifier mpag-5004-100 6.5” D x 19.0” W x 3.5” H 12 Lb. 15Hz to 48 kHz (+0, -1dB) @ normal plate...

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