The 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. A R T’s Tube MP/C circuitry is a hybrid design utilizing the latest, most advanced, solid-state and tube technology.
The preamplifier’s active balanced solid-state input provides extremely low noise and excellent common mode rejection. The ¼-inch high impedance input prevents loading of any connected device making the 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 20dB 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.
Optional ART SM1 stand mount securely attaches the Tube MP/C to any microphone stand for live stage or studio applications is available.
|Frequency Response||30 Hz – 60 kHz +/- 1 dB balanced output, 20 Hz – 60 kHz +/- 1dB 1/4″ output|
|Total Harmonic Distortion||<0.1% @ max gain|
|CMMR||> 60 dB @ max gain|
|Equivalent Input Noise||-128dBu typical (“A” wtd., Shorted XLR balanced input, gain @ max)|
|Input Impedance||1M Ω 1/4″ input, 5K Ω XLR input|
|Input/Output Connections||Input: XLR balanced or 1/4″ balanced. Output: 1/4″ unbalanced XLR balanced, transformer isolated.|
|Maximum Gain||+80 dB (balanced in-out, +64dB (unbalanced input, balanced output)|
|Maximum Input Level||unbalanced (Inst): +15 dBu, balancd (mic): +10 dBu|
|Maximum Output Level||+19 dBu (Line mode)|
|Output Impedance||XLR: <600 Ω, 1/4″: <300 Ω|
|Low Cut Filter||-3 dB @ 70 Hz, 6dB/Octave|
|Phantom Power||Switch selectable, +48Volts DC, filtered, current limited|
|Chassis Type||All aluminum black anodized with integral rubber sides|
|Power Requirements||9VAC @ 1000mA (external)|
|Attack Time||<1 ms (limit), 20 ms (comp.)|
|Release Time||150ms (fast), 20ms – 3s Program dependant (Auto)|
|Tube Type||Hand selected 12AX7a|
|Compressor Slope||2:1 (Comp.) / 11:1 (Limit)|
|Dimensions||1.75″H x 5.9″ W x 6.5″ D (44.5mm x 150mm x 165mm)|
|Weight||2.9 lbs (1.32 kg)|
|Notes||0dBu = 0.775V rms
Weight includes power supply and packaging