Fosi Audio: Powerful, Affordable Gear for Music Lovers
Powerful, Compact, & Built for Audiophiles
At Sun Mountain, we’re excited to introduce Fosi Audio—a brand transforming the landscape of hi-fi with compact, high-performance gear at prices that make sense. Whether you’re building out a minimalist setup or fine-tuning your dream system, Fosi products deliver serious sound for serious listeners.
From amplifiers and DACs to headphone amps, preamps, and speakers, Fosi’s lineup proves that audiophile quality doesn’t have to come with an audiophile price tag.
Why Fosi?
High-End Performance, Thoughtful Design
Award-winning mini amplifiers & headphone amps
Clean powerful, excellent dynamics, and ultra-low distortion
Built for music lovers, engineers, and everyday listeners
User-Driven Innovation
Over 50% of Fosi’s products are co-created with users
One of the most discussed brands on forms like Audio Science Review
Loved by musicians, audio engineers, and critics alike
Unmatched Value
Vertical integration means better pricing and better control
Leading repurchase rate and Amazon’s top brand in home audio
Recognized by Wirecutter, What Hi-Fi, and global audio communities
Featured Categories
Audio Power Amplifiers
Compact, dynamic, and efficient—Fosi’s mini amps redefine what’s possible in small enclosures.DACs & Headphone Amps
High-resolution digital audio meets clean analog output for serious headphone performance.Preamplifiers
Smooth volume control, accurate gain staging, and flexibility for your entire signal chain.Speakers
Matched for synergy with Fosi amps—balanced, room-filling, and elegantly tuned.
Built with Purpose
At it’s core, Fosi is built on Foresight, Openness, Sincerity, and Innovation. Their commitment goes beyond just hardware—they’re reshaping how audio fits into daily life.
And their work with organizations like The Music Works in the UK shows that they’re not just building gear—they’re building opportunities for young people through music.
Ready to upgrade your system?