ART Tube MP/C Microphone Preamplifier and Compressor

Warm up microphones or instruments in your studio with this tube preamp/DI box from ART, then dial in your sound with the onboard optical compressor/limiter.

The ART Tube MP/C (PreAmplifier/Compressor) is a multi-purpose tool for audio engineering and recording. Two independent circuits featuring a tube-based analog preamplifier and a VCA-less compressor with optical gain reduction control are housed in one, convenient desk-top chassis. Used as a mic/line preamp or as a DI (direct) box, the Tube MP/C is designed to work seamlessly with any recording, sound-reinforcement, or electronic instrument setup. ART's Tube MP/C circuitry is a hybrid design utilizing the most advanced, solid-state and tube technology.

The ART Tube MP/C preamplifier's active balanced solid-state input provides extremely low noise and excellent common mode rejection. The 1/4-inch high-impedance input prevents loading of any connected device making the ART Tube MP/C perfect for DI or line-level applications. The preamplifier's second stage 12AX7a tube runs on a regulated DC voltage providing an additional 20 dB of gain.

The compression circuit features a VCA-less design and utilizes optical electronics (Vactrol) coupled with a 12AX7a vacuum tube gain stage for superior musical performance.


- Tube-based mic/line preamplifier with up to 80 dB of gain
- Hand-selected 12AX7a tube
- Optical (VCA-less) compressor circuitry = transparent dynamics control
- 1/4-inch unbalanced inputs and outputs
- XLR balanced inputs and outputs
- Transformer isolated XLR output
- Selectable output range for Line/Instrument interface levels
- LED meters for Tube Warmth, read more Gain Reduction and Output level
- +48V phantom power
- Phase reversal switch
- Selectable release time settings
- > 90dB dynamic range
- Custom extruded aluminum chassis
read less

- Input Connections: XLR balanced or 1/4" unbalanced
- Input Impedance: 1M Ohms 1/4" input, 5K Ohms XLR input
- Output Connections: 1/4" unbalanced, XLR balanced, transformer isolated.
- Output Impedance: XLR: < 600 Ohms, 1/4": < 300 Ohms
- Frequency Response: 30 Hz - 60 kHz +1 dB balanced output, 20 Hz - 60k Hz +1 dB 1/4" output
- Maximum Gain: +80 dB (balanced in-out), +64 dB (unbalanced input, balanced output)
- THD: <0.1% at 1k Hz
- CMRR: >60 dB at max gain
- Equivalent Input Noise: -128 dBu typical (A wtd., Shorted XLR balanced input, gain at max)
- Maximum Input Level: unbalanced (Inst): +15 dBu, balanced (mic): +10 dBu
- Max Output Level: +19 dBu (Line mode)
- Phantom Power: Switch selectable, +48 Volts DC, filtered, current limited
- Tube Type: Hand selected 12AX7a
- Compressor Slope: 2:1 (Comp.) / 11:1 (Limit)
- Attack Time: < 1 mSec (limit), 20 mSec (comp.)
- Release Time: 150 mSec (Fast), 20 mSec - 3 Sec Program dependent (Auto)
- Low Cut Filter: -3 dB at 70 Hz, 6 dB/Octave
- Chassis Type: All aluminum black anodized with integral rubber sides
- Power Requirements: 9 VAC at 1000 mA (external)
- Dimensions (H x W x D): 1.75" x 5.9" x 6.5", (44.5 x 150 x 165 mm)
- Weight: 2.9 lbs. (1.32 kg) with power supply and packaging
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 3 lbs
Shipping Dimensions: 11 x 7 x 3 in
Manufacturer Part Number (MPN): TUBEMP/C
Warehouse Resealed
Shipping Weight: 3 lbs
Shipping Dimensions: 9 x 6 x 3 in
Manufacturer Part Number (MPN): TUBEMP/C

For support or warranty questions, please contact the manufacturer:
Phone: 716-297-2920

Reviewers gave this product an overall rating of 4 out of 5 stars. (3 ratings)
Submitted October 1, 2019 by Rodney Paul in Coahoma, TX
"Provides Quality Features In A Budget Preamp"
Overall: 4 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Have used exclusively in a home studio, cabled into Channel one via TRS into a line in on an ONYX 2-2 Producer interface. We have 8 Focusrite OctoPre preamps, and and an amazing Digitech preamp/FXLive pedal with Gold channel plus stellar vocal effects. The Art Tube MP C mic preamp compressor works some solid majic if you use it lightly/subtle. Holds up to it's end of the "colour" preamp we nneded. Decent compared to the ONYX and Scarlett's.Two year of soldid use, had to open it up and reset thr switch for setting comp/limit. Worth the $ for budget colour/drive. Replace the tube.
Compressor is dawg
Ease of Use
Manufacturer Support
never used it
The Wow Factor
a little over 60% wow factor
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