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ART Digital MPA-II
2-Channel Tube Microphone Preamplifier with A/D Conversion


Get that much-loved tube sound for your microphones without breaking the bank with ART's Digital MPA-II 2-channel tube microphone preamplifier.
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Our Price: $399.00
List Price: $539.00
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ART Digital MPA-II
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Get that much-loved tube sound for your microphones without breaking the bank with ART's Digital MPA-II 2-channel tube microphone preamplifier. This preamp delivers all the same features of the ProMPA with the inclusion of a digital output for expanded versatility. 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 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 2U space rack-mountable steel chassis, with CNC routed black anodized aluminum face panel.

ART Digital MPA-II 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 - 204 kHz External sample rate
  • 44.1, 48, 88.2, 96, 176.4, 192 kHz 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

ART Digital MPA-II Specifications:

  • Analog Section:
    • Frequency Response: 
      • Normal Plate Voltage:  15 Hz - 48 kHz (+0, -1dB)
      • High Plate Voltage:  15 Hz - 120 kHz (+0, -1dB)
    • 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); >800 kOhms (instrument)
    • Maximum Output Level:  +27dBu (XLR)
    • Output Impedance:  <47 Ohms (XLR)
    • Maximum Gain:  75dB
    • Meter Calibration:  0 VU = +4dBu output (+4dBu mode); 0 VU = -10dBV output (-10dB mode)
    • High Pass Filter:  Single Pole, 10 - 200 Hz adjustable
  • Digital Section:
    • A/D Frequency Response:
      • 44.1 kHz Sample Rate:  10 Hz - 21.25 kHz (+0, -1dB)
      • 88.2 kHz Sample Rate:  10 Hz - 42.50 khz (+0, -1dB)
      • 196 kHz Sample Rate:  10 Hz - 81 kHz (+0, -1dB)
    • A/D Dynamic Range:  >112dB A-weighted (typical)
    • A/D THD:  <0.001% @ 1 kHz (typical)
    • A/D Input Sensitivity:  +12dBu min
    • A/D Insert Input Impedance:  >10 kOhms
  • Power Requirements:  105 to 125 VAC/60 Hz
  • Dimensions (HxWxD):  3.50" x 19.0" x 8.75" (88 mmx 482 mm x 222 mm)
  • Weight:  10.5 lbs (4.7 kg)

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