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 ART PRO CHANNEL - Tube Mic Preamp/Compressor/EQ

Applied Research and Technology introduces the Digital MPA Tube Microphone Preamplifier – the first member of the forthcoming Digital Innovations Series.

The Digital MPA is one of the finest microphone pre-amps with digital capability available. The new enhanced discrete front end maintains every nuance, revealing incredible dynamic range.

Our unique tube circuitry using two 12AX7A tubes render unsurpassed detail and clarity with the broadest range of microphones.

Take advantage of this world class processing via the analog and digital outputs. AES/EBU, S/PDIF. TOSLINK, and ADAT interfaces allow connection to the broadest range equipment. The Digital MPA provides 24 bit or it can adapt to 16 bit applications with the push of a button. The A/D is front panel adjustable from 44.1 to 96K or syncs to ADAT or external word clock (32KHZ to 100KHz).

The Digital MPA circuitry is a hybrid design utilizing the strengths of all available technologies. The active balanced triple-differential transistor design with local feedback provides excellent CMRR and lower noise than the typical transformer/tube front end. The 12AX7A tube section running on a regulated supply provides gain while maintaining the incredible dynamic range of the previous stage and controlled overload characteristics. Insert jacks between the analog and digital section allow patching in additional signal processing before entering the digital realm.

Separate balanced analog outputs and multiple digital outputs possess individual level controls allowing simultaneous use. While the new Digital MPA accepts full line levels, an additional high-Z ¼” input makes the Digital MPA the perfect DI in studio and live applications.

The digital output section can be patched into directly via ¼”insert jacks between the analog and digital sections. This allows additional signal processing before entering the digital realm or use as a standalone high quality A/D converter. Professional and consumer output formats are selectable as well as choice of optical format. You can even patch into any ADAT stream and select which pair (or ALL) of channels the Pro MPA w/ DIO transmits.

The first of the Digital Innovations Series, the Digital MPA was conceived, designed and manufactured to the highest standards to provide years of quiet, reliable performance.

Audition one today and you too will know why this is one of the most acclaimed professional mic pre-amps on the market today.

The Digital MPA is an ADAT licenced.


Professional features and spectacular tone are what make the Digital MPA™ a world-class microphone preamplifier. Its impressive feature set includes:

  • Variable Input Impedance for flexible microphone voicing (150 Ohms to 2400 Ohms).
  • Selectable plate voltage
  • Large VU meters
  • Front accessible meter trim
  • Selectable between output level and tube warmth
  • Improved discrete class A input microphone preamplifier
  • Lower noise at low gains
  • Lower THD
  • Wider frequency response
  • Front accessible Instrument Input Jack
  • Very high input impedance
  • Automatically switches to the instrument input when you plug in

The Digital MPA also features digital connectivity for use with various digital processors and digital recording devices. The Digital interface supports the following features and functions:

  • 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 and output format.
  • Separate analog and digital output level controls
  • Digital Level LED meters
  • ADAT optical I/O
  • Sync to incoming ADAT data rate
  • Switch selectable optical output (S/PDIF or ADAT)
  • Selectable Pro/consumer output format.
  • AES/EBU output on cannon connector
  • Two wordclock jacks allowing loop through


CMRR >90dB (typical @ 1kHz)
Controls Input, Impedance, Output level, Digital Level, High Pass Filter, and Sample Rate
Dimensions 6.5” D x 19.0” W x 3.5” H
Dynamic Range >100dB, 20Hz to 20kHz
Equivalent Input Noise - 134dB (XLR to XLR ‘A’ weighted)
Frequency Response 15Hz to 80kHz (+0, -1dB)
Input Impedance 150-3K ohms (XLR), 840k ohms (1/4")
Analog Connections Balanced XLR (pin 2 hot) inputs and outputs, A/D inserts (TRS) and Unbalanced 1/4” outputs (TS) inputs
Digital Connections AES/EBU (XLR), S/PDIF (RCA), ADAT Optical In, ADAT/TOSLINK Out, Wordclock In, and Word clock Thru (BNC)
Switches +20dB gain, Phase Reversal, Plate Voltage, Meter Source, Phantom Power w/ LED, Dither, Optical Format and Power
Maximum Gain XLR to XLR 75dB
Maximum Input Level +18dBu (XLR), +16dBu (1/4")
Maximum Output Level +28dBu (XLR)
Output Impedance 47 ohms (XLR)
Power Requirements 100 - 125 VAC, 25W Export units configured for country of destination
Total Harmonic Distortion >0.005% (typical)
Vacuum Tube Hand-selectes 12AX7A
Weight 12 Lbs

Tube Mic Preamps Series Overview

Pro Dynamic Processors: The Digital MPA™ Solid Gold. A professional microphone preamplifier is defined by warmth, presence and clarity – core elements that make an audio processor desirable. We’ve designed a microphone preamplifier that captures all these elements, with an exceptionally affordable price.Introducing the Digital MPA™ by ART. With features like variable input impedance, selectable plate voltage, dual differential Class A inputs, digital outputs and sample rates up to 192kHz, it is truly a modern day classic.

Tube MP: The World’s Most Popular External Tube Mic Preamp. Whether you’re working with a computer, hard disk or digital multi-track recorder, the Tube MP’s TEC award nominated design will allow you to obtain professional results at an affordable price. ART preamps offer warm tone, useful features, and are innovatively designed. Our line of Tube MP products add presence, clarity and fullness to any signal, and is exceptionally low-noise. Our Tube MP Studio V3™ features V3™ Technology (Variable Valve Voicing), which provides optimized reference points to begin the recording process. V3™ delivers a wide variety of settings designed for various microphones and DI inputs, including guitars, basses, keyboards, synths, electronic drums and much more. Don't settle for a copy-cat lookalike. Go with the real thing - the Tube MP by ART!

Dynamic Tube Processors: TPS & DPS Our ART TPS features two channels of award-winning ART microphone preamplification. The DPS has the same preamplifier design, and adds ART’s critically acclaimed 24 Bit – 96kHz A/D converter – for warm, vibrant and clean digital audio. As with the TPS, the DPS features our V3™, which delivers a wide range of professional sounding presets designed to seamlessly integrate and enhance every microphone, musical instrument and direct signal you process.

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Price:  $699.00   (includes GST)



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