Overview

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 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.

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 (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

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 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