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Art

Art Digital MPA-II 2-Channel Tube Microphone Preamp with A/D Conversion

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Overview

An affordable 2-channel preamp with quality A to D conversion.

The ART Digital MPA-II delivers all of the same great features of the ProMPA with the added versatility of digital output. Like the ProMPA-II, each input circuit has 48v phantom power and features variable input impedance which can radically vary the overall performance of any high quality dynamic or ribbon microphone. The Digital MPA-II can be configured for dual mono or stereo operation with selectable mid/side mic support, summing the adjacent channel, to decode left/right signals.

The input section of the Digital MPA-II operates at either a low or high plate voltage applied to the two integrated hand-selected 12AX7 tubes for wider variation of preamp tone and performance. Large back-lit analog VU output meters display input or output levels while multi-colored LED arrays, with average or peak hold, show tube gain and digital output levels.

In addition to XLR and 1/4" analog outputs, the Digital MPA-II features a high quality A to D converter which offers digital connectivity on S/PDIF, ADAT, or AES/EBU outputs. A rotary control on the front panel allows selection of format and sample rates from 44.1 to 192 KHz and 16 bit dithering. There is also a push button for, and two wordclock jacks, allowing loop-through.

The Digital MPA-II comes in a standard 2 unit space rack-mountable steel chassis, with CNC routed black anodized aluminum face panel.

Features

  • Variable Input Impedance For Flexible Microphone Voicing (150 Ohms To 2400 Ohms)
  • Selectable Plate Voltage
  • Large VU Meters
  • Backlit Function Switches
  • Discrete Class-A Input Microphone Preamplifier
  • Low Noise at Lower Gain Settings
  • Extremely Low Total Harmonic Distortion (THD)
  • Wide Frequency Response
  • Additional Front Mounted Instrument Input Jack
  • Supports Mid/Side Miking Technique
  • Operates at +4dbm/-10dbv Output
  • Selectable Stereo/Dual Operation of Output Controls
  • Automatic Instrument Input Selection
  • 24-204KHz External sample rate
  • 44.1K, 48K, 88.2K, 96K, 176.4K, 192K Internal sample rates
  • 24/16 bit switchable dithering
  • Wide dynamic range A/D
  • Rotary Encoder for quick selection of sample rate
  • Separate analog and digital output level controls
  • Digital Level LED meters display both Average and Peak level
  • ADAT optical I/O
  • Sync to incoming ADAT data rate
  • Switch selectable optical output (S/PDIF or ADAT)
  • AES/EBU and S/PDIF outputs
  • Two wordclock jacks allowing loop through
Specs

Digital MPA-II 2-Channel Tube Microphone Preamp with A/D Conversion Specifications:

Analog Section:
  • Frequency Response 15Hz to 48 kHz (+0, -1dB) @ normal plate voltage
  • 15Hz to 120 kHz (+0, -1dB) @ high plate voltage
  • Dynamic range: >110dB ("A" weighted)
  • CMRR: >90dB
  • THD: <0.005% (typical)
    Equivalent Input Noise: -129dBu (XLR, "A" weighted)
  • Maximum Input Level: +19dBu (cannon)
  • Maximum Instrument Input: +17dBu
  • Input Impedance: 150-3000 Ohms adjustable (XLR)
  • >800K Ohms (Instrument)
  • Maximum Output Level: +27dBu (XLR)
  • Output Impedance: < 47 Ohms (XLR)
    Maximum Gain: 75dB
  • Meter Calibration: 0 VU = +4dBu output (+4dB mode)
  • 0 VU = -10dBV output (-10dB mode)
  • High Pass Filter: single pole, 10-200 Hz adjustable
Digital Section:
  • A/D Frequency Response:
  • @44.1KHz sample rate: 10Hz to 21.25KHz (+0, -1dB)
  • @88.2KHz sample rate: 10Hz to 42.50KHz (+0, -1dB)
  • @196KHz sample rate: 10Hz to 81KHz (+0, -1dB)
  • A/D Dynamic Range: >112dB "A" weighted (typical)
  • A/D THD: <0.001% @1K (typical)
    A/D Input Sensitivity: +12dBu min
  • A/D Insert Input Impedance: >10K Ohms
  • Power Requirements: USA - 105 to 125 VAC / 60 Hz Export units configured for country of destination
  • Dimensions: (H x W x D in) 3.50 x 19.0 x 8.75
  • Dimensions: (H x W x D mm) 88 x 482 x 222
  • Weight: (lb/kg) 10.5 / 4.7
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