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
N-audio EVA studio tube microphone preamp is a class-A tube microphone preamp, that combines vintage classic sound with modern features for professional sound recording. A flexible and compact 1U rack unit for your studio with which you can record or master your recordings. It gives flexibility and rich tone of a professional tube channel strip with 100% analog schematics and an all-tube signal path.

Full-featured Microphone Front End
N-audio Eva studio tube pre-amp has all the necessary features and input controls including a transformer-based microphone XLR input, a -20dB pad switch, a phase reverse switch, and a +48 volt phantom power for condenser microphones. 

High-Impedance Instrument Input
A specially designed high-impedance instrument input is added for direct recording of guitar, bass, or sound modules. The signal is fed directly to the tube for classic sound performance. High Z input is also suitable for recording clean guitars for later use with amp modeling software in your DAW. In this case, your recordings can benefit from a low noise, proper impedance matching, and added nice tube color for a high-quality final result. 

Pure Tube Signal Path
Classic pure tube signal path 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. 

High-Quality Tube Limiter
A unique tube limiter design is integrated into Eva tube preamp. 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 - off, green, yellow, and red. 

Passive EQ Section
To get the best natural sound, the preamp uses passive EQ tone control. Driven by a low impedance output and without any feedback, 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. In bypass mode, the EQ is completely isolated from the signal path. 

Separate Gain And Level Controls
With separate gain and output level controls you can achieve different tones – from more transparent to more colored with typical tube glow. 

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. For grounding of the PCB, multiple star-ground is used to reduce noise. All PCB tracks have vintage rounded edges which simulate point-to-point technology.

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 harmonics to your recordings.

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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