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KERWAX Replica

Tube Line Preamplifier, hand-made in France.


The KERWAX Replica is a 2-channel excerpt of the 24-channel custom tube mixer installed at KERWAX recording studio, a unique mixing desk conceived in the pure tradition of historical studios to meet the requirements of in-house sound engineers and producers. Its 2 independant channels are ideal for stem or individual instrument processing.


The Kerwax Replica creates a wide variety of tube harmonic distortion characteristics, from gentle enhancement to smashing blast, with an easy tweaking combination of gain drive and output volume stages, bias adjustment and EQ knobs. It is the ideal companion as an insert or a front-end unit for processing and warming up your stems or mix.


To order a Kerwax Replica, contact us. We will communicate the final offer including the shipping costs according to your location. No Credit Card or Payment needed!

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This unique device allows you to choose between two audio modes : Standard Left/Right for individual track processing or Mid/Side to control stereo image, ideal for mastering operation.


. 2 Audio Modes Left/Right and Mid/Side

. 2 Tubes per Channel (Preamp & Drive)

. Tube Preamp BIAS Adjustment

. Gain/Volume Adjustment for Harmonic Distortion

. Trim Adjustment

. Treble & Bass EQ Ajustment

. Selectable High-Pass Filter

. Individual Channel Phase Switch

. Output Level Monitoring on VU-meters

Vacuum tube sound

The KERWAX Replica uses two vacuum tubes per channel: one for pre-amplification and equalization, and one for the Volume/Gain stage. We selected the 12AX7 tubes for their optimal results with a wide variety of audio sources. However, if you want to experiment and obtain different results, the tubes are replaceable. You can use all references from the 12AX7 family.

Create your own touch

Now, you can build your distinctive sound, and stand out in the digital crowd. You can easily warm-up and add distorsion to any input audio signal: use Trim and Bias settings to adjust depth of sound and produce harmonics, and select Drive function with Gain setting to add progressive saturation to the sound. Thanks to its gentle Baxendall curves, the integrated treble and bass EQs are very musical and smooth. In case you need to remove some harmful low frequencies, a High-Pass filter allows you to choose between 80 Hz and 120 Hz frequencies. The possibilities are endless: experiment and enjoy!


Download the manual in English

Download the manual in French


Weight 11 kg
Dimensions 560 × 465 × 375 cm