EVA Studio tube mic preamp

EVA Studio tube mic preamp EVA Studio tube mic preamp EVA Studio tube mic preamp EVA Studio tube mic preamp EVA Studio tube mic preamp
The N-audio EVA Studio Tube Microphone Preamp is a top-of-the-line, high-quality class-A tube microphone preamp that combines vintage classic sound with modern features for professional sound recording. This flexible and compact 1U rack unit is the perfect addition to your studio, whether you're recording vocals, guitar, bass, drums, or any other instrument. With the N-audio EVA, you can capture rich, warm tones that will elevate your recordings to the next level.


Featuring a full-featured microphone front end, the N-audio EVA studio tube preamp has all the necessary input controls, including a transformer-based microphone XLR input, a -20dB pad switch, a phase reverse switch, and +48 volt phantom power for condenser microphones. Whether you're recording a soft-spoken vocal or a loud guitar riff, the N-audio EVA can handle it all.

The high-impedance instrument input, allows you to record guitar or bass. The signal is fed directly to the tube for classic sound performance, giving you the flexibility to record clean guitars for later use with amp modeling software in your DAW. In this case, your recordings can benefit from a low noise and added nice tube color for a high-quality final result.

The N-audio EVA's classic pure tube signal path is built with a minimalistic approach and minimum passive parts, including an input microphone transformer, two high-quality tubes (ECC803S and ECC802S), and an output transformer. The signal path includes only two capacitors to get the best classic tube sound and as low non-harmonic distortion as possible. This ensures that your recordings sound as rich and authentic as possible.

Another standout feature of the N-audio EVA is its high-quality tube limiter, which offers a unique design with a typical rich tube character. The limiter has a great performance in all three positions that you can choose with a dedicated button on the front panel. The limiter LED indicator next to the button shows the selected limiter threshold. This allows you to control the dynamics of your recordings with ease, giving you the flexibility to achieve the perfect sound.

To get the best natural sound, the N-audio EVA uses a passive EQ tone control that is driven by a low impedance output. This EQ helps to improve your recordings and can be used for mastering without adding unwanted harmonics, distortion, or noise. The additional EQ bypass switch is added, and in bypass mode, the EQ is completely isolated from the signal path.

With separate gain and output level controls, you can achieve different tones – from more transparent to more colored with typical tube glow. The N-audio EVA also features an extremely low noise power supply design. A lot of attention is paid to the power supply and PCB design. For best performance, instead of passive R-C filters, N-audio EVA studio tube microphone preamp has an active high voltage (+350VDC) regulator with integrated soft start. This increases the tubes' life and decreases ripple voltage noise.

Finally, the N-audio EVA comes with balanced transformer isolated input and output. The best microphone preamp must have input and output transformers. They isolate galvanically the preamp from other audio devices and increase the sound quality, adding pretty sweet musical

Block Diagram:


  • Size: 19" 1U rack unit 13 cm deep
  • Weight: 2.4Kg
  • Power consumption: Max 15W at 230VAC
  • Frequency response 35Hz÷33kHz +0dB ÷ -3dB with EQ OFF
  • XLR input impedance: 600 Ohm
  • 1/4" instrument input impedance: 1Megaohm
  • Output impedance: below 600 Ohm
  • Noise floor: below -100dB
  • Maximum gain: 55dB
  • Tubes: JJ ECC803S, JJ ECC802S
  • Mains: Internal pre-selected 230/240VAC or 110/115VAC
  • Designed and handcrafted in Europe
  • Lifetime warranty
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