Art DIGITAL MPA User's Guide

DIGITAL MPA II™ ART DIGITAL MPA II™ Microphone Preamplifier USER’S GUIDE

7 When the switch is in the “Dual” position the output controls act on only their respective channels. +4/-10 switch (rear panel) The +4/-10 switc

8As the Digital Level control is used refer to the Digital Level LED meter which indicates both peak and average level present at the A/D converter i

9sample rates, indicating the fraction of a second it takes to settle to the new rate. This is normal). NOTE: When using the ADAT Input as a sync sou

10Front Panel connections Instrument Inputs The ¼” jacks on the front panel serve as an instrument input. The input impedance is always >1M Ohm a

11Rear Panel connections Figure 4 – Rear connections Balanced Inputs The DIGITAL MPA II’s XLR connectors follow the AES standard of Pin 1 = Groun

12Insert jacks The insert jacks are used to process the audio passed on to the A/D converter. The Insert Jacks are wired: Tip = Input, Ring = Output,

13Using the optical output in S/PDIF is recommended over the coax output, as it is the most robust and reliable of all the digital outputs. S/PDIF

14DIGITAL MPA II OPERATING INSTRUCTIONS Obtaining the best noise performance with the DIGITAL MPA II Start by turning down the Input Gain knob and

15Dynamic microphones are affected as much as phantom powered units. We provide a continuously variable impedance control to allow you to fine-tune

16Setting the Tube Plate Voltage The DIGITAL MPA II allows the user select between one of two vastly different tube bias and power supply levels. The

IIIMPORTANT SAFETY INSTRUCTIONS – READ FIRST This symbol, wherever it appears, This symbol, wherever it appears, alerts alerts you to the presen

17Using the Mid/Side mode The DIGITAL MPA II is designed for stereo operation using the Mid/Side switch and two micro-phones. One of the mics needs

18WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordance with the fol

19SERVICE 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

20DIGITAL MPA II SPECIFICATIONS Analog Section: Frequency Response... 15Hz to 48 kHz (+0, -1dB) @ normal plate volta

21 www.artproaudio.com E-mail: [email protected] DIGITAL MPA II 216-5004-201h

IIIIMPORTANT SAFETY INSTRUCTIONS – READ FIRST ... II DIGITAL MPA II OVERVIEW – FEATURES AND GEN

1 DIGITAL MPA II OVERVIEW – FEATURES AND GENERAL INFORMATION: The ART DIGITAL MPA II microphone preamplifier features a new low noise, high performa

2 The signal path of the DIGITAL MPA II consists of a discrete class A microphone pre-amp followed by a Low Cut Filter, a balanced differential tube

3FRONT PANEL CONNECTIONS AND CONTROLS Figure 2 – Front controls Input Gain control This control optimizes the input signal level before the tube

4with the DIGITAL MPA II for more detailed instructions on setting the Input Gain control for the best results. Input Impedance control This knob co

5Phantom switch Phantom power on the microphone input is turned on and off with this switch. Depressing the switch will power condenser microphones a

6In the “Normal” (OUT) position, the tube distortion gradually rises until it smoothly clips. The tube is run almost completely open-loop in this mod