Enhanced Audio Control The XRA901 Tone Board Preamp provides dedicated adjustments for treble and volume to finetune your audio output. Versatile Compatibility Designed to integrate with various amplifier boards, enabling upgrades to both home and professional audio systems. Why this matters Precise tone shaping with straightforward controls helps you tailor end detail and overall loudness without replacing existing gear. Flexible compatibility makes it suitable for a range of projects and setups, from hobbyist builds to professional installations. Use scenarios Home audio upgrade: add the XRA901 to an existing amplifier board to improve treble clarity and control overall loudness for music and movie soundtracks. Small studio or project setup: insert the preamp in a signal chain before the power amp to achieve clearer highs and balanced output during mixing and monitoring. Custom PA or live sound: incorporate the preamp into a compact or portable rig to adjust frequency response and level in real time for events or presentations.