VLC

The VLC is simply a solution: an elegant, high-performance Preamp/EQ/DI combo that delivers world class sonics while still being able to fit into the overhead bin.

The foundation of the VLC is the legendary Preamp and Power Supply design utilized in the VT series of Tube Microphone Preamplifiers from D.W. Fearn. Designed for sonic transparency and delivering incredible headroom, the VLC will produce stunning results with dynamic, condenser and ribbon microphones and will change the way that you approach your mic locker during a session. 

https://www.hazelriggindustries.com/s/Hazelrigg-Industries-VLC-Manual.pdf