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ART (Applied Research & Technology)


ART Digital MPA-II – Two Ch. Mic Pre w/ A/D Conversion


The all-new 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 a 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 the 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-word clock 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.

Key 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 to 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-word clock jacks allowing loop-through


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 (Omega) adjustable (XLR)

    >800k (Omega) (Instrument)

  • Maximum Output Level: +27dBu (XLR)

  • Output Impedance:: < 47 (Omega) (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 (Omega)

  • Power Requirements: USA – 105 to 125 VAC / 60 Hz Export units configured for country of destination

  • Dimensions: (HxWxD in) 3.50 x 19.0 x 8.75

  • Dimensions: (HxWxD mm) 88 x 482x 222

  • Weight: (lb/kg) 10.5 / 4.7