ART Digital MPAII Microphone Preamplifier

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.

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

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 in. 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.

Technical Info

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 (HxWxD): 3.50 x 19.0 x 8.75 in.

Dimensions (HxWxD): 88 x 482 x 222 mm

Weight: (lb/kg) 10.5 / 4.7

ProMPA II features with S/PDIF, ADAT, or AES/EBU outputs and sample rates from 44.1 to 192kHz.