The Mantle is a premium preamp and DI for electric bass

The Mantle is a premium preamp and DI for electric bass, created in close collaboration with Ian Martin Allison. Designed to give your instrument an impeccable sonic foundation, the Mantle brings studio-grade refinement to any environment - whether you’re stepping onstage, tracking in the studio, or shaping your tone at home.
$749.99

https://www.walrusaudio.com/products/mantle-analog-bass-preamp-d-i?variant=47179209801963