Handbox R400

Simple to use, compact and lightweight, we created and refined the R-400 in collaboration with working musicians, using a wide range of active & passive basses.

PREAMP:
The preamp utilises three 12AX7 (ECC83) tubes. Unlike the starved-plate designs of most common hybrid heads, it’s pure tube with no silicon diodes, getting you even closer to the sound of a full-tube head.

POWER SECTION:
We use a classic A/B power supply based on an efficient toroidal transformer and large capacity electrolytic capacitors, delivering a powerful 400W into a 4ohm load.
An optical limiter ensures you’re always running within safe limits, and the R-400’s on-board fan is thermally managed and controlled to ensure the amp runs smoothly at high volumes.