Sunnaudio is a boutique audio electronics company based in Belmont, California, led by engineer and CEO Sunny Wai alongside senior product developer Marc Games. The company designs preamps and direct boxes aimed primarily at acoustic guitarists and bassists, with an emphasis on discrete FET circuitry, film capacitors, extensive RF shielding, and long battery life in portable enclosures.

Its catalog spans pedalboard-friendly preamp/DIs and stereo studio-quality boxes, including the Stage DI-1 and Stage DI-2 Prestine, the MS-2 stereo preamp (in MS-2b and MS-2c variants), the R2D3 Helion preamp, and the NU-1 Nucleus, RH-1 Rabbithead, and GainMaster pedals. Earlier and ongoing models include the LD-1 Line Driver, TD-1 Tone Driver, and BL-1 Blender preamps, alongside accessories such as the Dazzo Pickup Set.

The brand has been covered in outlets including Premier Guitar, Acoustic Guitar, and Bass Gear Magazine, with reviewers highlighting its tonal versatility and studio-grade sound quality in stage-ready form factors. Sunnaudio occupies a niche in the acoustic-amplification market alongside other boutique preamp builders, with most products produced in small runs.

Sunnaudio has 3 products cataloged on Equipboard, including Guitar Preamp Pedals, Boost Effects Pedals, and Overdrive Effects Pedals.