ART Digital MPAII 2 Channel Microphone Preamp With Digital Output

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MSRP: $639.99
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Product Description

The all new ART Digital MPA II is a great two channel microphone preamp 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 inch 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 space rack-mountable steel chassis, with CNC routed black anodized aluminum face panel.


  • 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

See all items from ART
Helpful Info about the Manufacturer
Phone:  (716) 297-2920 Warranty:  1 year

Product Specifications

Product Specifications
ART MPAII Microphone Preamp 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: (HxWxD in) 3.50 x 19.0 x 8.75
  • Dimensions: (HxWxD mm) 88 x 482x 222
  • Weight: (lb/kg) 10.5 / 4.7

Customer Reviews

Review: Sin Submitted: 10/14/2018

Product Rating5 out of 5 stars.

verified buyer


Great Mic Pre
Product Rating

Product Review

This thing is pretty awesome. Able to get great clean tones as well as tube warmth. The stock Chinese tubes weren't bad, but I swapped them out anyway. Killer pre for the money.

Review: TJ from NorrthPole, AK, USA Submitted: 9/11/2012

Product Rating5 out of 5 stars.


Pro quality

So far very dependable.

It has plenty of IO including AES digital IO. Separate analog and digital output level control. Wordclock pass thru to name a few.

Really easy to use and connect the way you want it. Manual is short but gives you enough info to start using without any problems.

Great. Numerous ways to get the sound you want. Plate voltage, input impedance or input gain. Easy to change tubes too for a different character.

Didn't have it for very long but no problems so far. Feels solid.

Your general opinion of this product.

You can buy other models but this seems most flexible and AD/DA (192k capable) with numerous including pro interface options is great to have.

Review: calaverasgrande from Oakland CA Submitted: 10/11/2010

Product Rating5 out of 5 stars.


Best Value!

All of teh knobs and switches feel very solid.

I am stunned that the highpass actually works on teh DI input! This is a simple feature that rules! Yet I have never seen another pre that does this. The support for both optical and RCA digital outs is great. Also the inclusion of AD conversion (all the way up to 192/24) is unheard of at this price point.

I havent even cracked teh maual. It is very easy to use, however I am an experienced sound engineer. Some features, such as mid-side are advanced techniques.

It has very good tone. Not great. This isnt a summit or neve or API. However, it beats the pants off of anything in its price range.

only owned a week so far. cant say

Your general opinion of this product.

This is a sleeper. This unit is literally raved about on pro audio boards. Buy one before ART gets wise and doubles the price. It is actually very quiet for a tube pre, the conversiosn sounds decent, and the extras are great. The only pther pres I have that beat this cost a LOT more.

Review: Studioman from Mantua, OH. USA, anonmyous50896 Submitted: 4/4/2010

Product Rating5 out of 5 stars.


AWESOME for the $!

It looks AWESOME in the rack, you gain 2 channels of inputs (assuming your interface has SPdif in). It seems REAL nice for the $... My guess, nothing below $600 is as nice as this unit. My opinion, you must spend $700 or more to get something truly nicer, and then still you may want to add this pre for a multitude of reasons. Bottom line, if you looking for something that has SPdif outs, this unit is perfect, for this reason alone! Then add the front instrument inputs, the added depth/fullness, this is your ticket for the $... Looks MUCH nicer than it actually is! The massive monitoring deal is nice & looks impressive.

SPdif output! My main reason for wanting to try this unit. The front inputs are really sweet too! The recorded tone is really strong, using a Beta87a, and Rode NT1000.

Simple to setup, easier to use. The front instrument inputs are cool, plug into them, it automatically disconnects the XLR inputs. SPdif out is the ONLY way to go. The converters in this unit seem REALLY nice.

Nice full sound, using the above said mics for my testing.

Im sure it will be fine for years to come.. At least I hope!lol

Your general opinion of this product.

I ran comparison tests, this is now my nicest pre, particularly using the converters on this hardware unit. It just has a full sound to it for a budget pre.


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