From desktop listening to home theater systems, Fosi Audio mono amps provide dedicated power and control for different audio setups.

Desktop Audio Setup

Add extra punch to your desktop speakers with greater power, better clarity, and more dynamics. Compact Mono Amps will assist in building an overall better audio experience for music.

Home Stereo System

Give your passive speakers the energy they require in order to work in optimal condition. Professional amplification can assist you in achieving better bass and better control over your audio experience.

Home Theater & Subwoofer

Boost your movie and music experience with subwoofer amplifier technology. Mono Amps for subwoofers provide enhanced bass and greater effects for an overall better home theater experience.

Passive Speaker Upgrade

Unlock more performance from your existing passive speakers with cleaner and more stable power. Mono Amps can help improve dynamics, soundstage, and overall listening enjoyment.

Compact Wireless Audio

Build an easy-to-use audio system that comes with Bluetooth capability and an easily portable amp. Experience wireless audio streaming without making things complicated.

Increase the Power and Emotional Impact of Your Music

Your speakers deserve dedicated power. Fosi Audio Mono Amps deliver focused power to one channel, giving your speakers better control, stronger dynamics, and a more engaging listening experience. From deeper bass to clearer details, a dedicated mono power amplifier helps your speakers perform at their best.

More power means more than just higher volume — it means better control.

By providing focused amplification, your speakers will be better able to cope with the challenging bass sections. Expect better bass, enhanced dynamics, and improved performance regardless of what you are listening to – music, films, or your preferred playlists.

• Deeper and tighter bass response
• More powerful impact during dynamic moments
• Better control for passive speakers and subwoofer systems 

Hear Every Detail Clearly

Clean and stable power helps your speakers reveal more of the music.

A mono power amplifier reduces the limitations of shared power between channels, allowing vocals, instruments, and subtle details to sound clearer and more natural.

• Clearer vocals and instrument separation
• Smoother highs with less harshness 
• More balanced and immersive sound 

Unlock Your Speakers’ Full Potential

Many passive speakers have the ability to deliver incredible sound — they just need enough power and control.

Dedicated Mono Amps give each speaker the energy it needs to perform with greater dynamics, wider soundstage, and improved overall performance.

• Stronger speaker control
• More open and detailed soundstage 
• A more powerful listening experience

Selecting the proper mono power amplifier is determined by your speakers, preferences, and the audio configuration you are operating in. If you require more power for passive speakers, extra bass for a subwoofer, or just a basic wireless amplifier, then Fosi Audio provides you with a mono power amplifier.

V3 Mono — For High-Power Passive Speakers

V3 Mono is designed for users who want to get more performance from their passive speakers. Its dedicated mono power provides stronger control, improved dynamics, and the extra power needed for speakers that demand more energy.

With a compact Class D design featuring the TI TPA3255 chip, PFFB technology, and up to 240W output at 4Ω, the V3 Mono delivers deeper bass, clearer details, and a more powerful listening experience.

Best for:

• Bookshelf speakers and floor-standing speakers
• Desktop HiFi systems
• Users building a dedicated left/right mono amplifier setup

ZA3 — For Versatile Stereo and Mono Sound Systems

ZA3 is a highly adaptable amplifier capable of operating either in stereo or mono mode, providing the user with greater flexibility when constructing his audio system. It may be used as a stereo amplifier for daily listening and switched to mono mode when more power is required on one channel.

With balanced XLR input support and multiple connectivity options, including Bluetooth, the ZA3 is perfect for those who require a multi-functional amplifier in a single unit.

Best for:

• Desktop audio and home stereo systems
• Users who want stereo/mono flexibility
• Audio enthusiasts upgrading their systems

M04 — For Compact Subwoofer Upgrades

TheM04is a unit meant for individuals who desire to enhance their experience with a passive subwoofer by adding power and control but without having an elaborate setup. It will help in improving the performance of the bass in your system, making your music and movie experience more engaging.With its compact design and easy setup, the M04 is a practical choice for smaller audio systems that need stronger bass performance.

Best for:

• Passive subwoofers
• Compact home theater systems
• Desktop or small-room audio setups

M03 — For Powerful Subwoofer Bass

TheM03is built specifically for low-frequency performance, providing dedicated power for passive subwoofers. With up to 300W output and switchable full-frequency / sub-bass modes, it delivers deeper bass, stronger impact, and more immersive sound for music and home theater.

 If your system needs more bass energy and better control over your subwoofer, the M03 provides the power you need.

Best for:

• Passive subwoofers
• Home theater systems
• Bass-focused audio upgrades