Engineered for Audiophiles - Optimal Choice for Home Audio Systems

In 2023, following the launch of the V3 stereo amplifier, we received numerous valuable suggestions and feedback from our global audio lovers. We listen intently, record diligently, and develop with dedication, ultimately striving to transform your suggestions and ideas into reality—the V3 mono.

  • Input: RCA, XLR, ¼" TRS; Output: Passive Speaker (supports banana plug or bare wire connection)
  • SINAD: XLR--101dB; RCA--93dB; SNR: ≥123dB
  • Rated Power Output: 48V/5A 240W@4Ω; 32V/5A 100W@4Ω

NICHICON Caps, Japanese

Ensure superior sound clarity, longevity, and stable electrical performance, enhancing the fidelity of audio reproduction.

WIMA Caps, German

Provide exceptional sound quality and signal stability, greatly enhancing the audio experience.

Sumida Inductor, Japanese

Offers superior signal purity and noise reduction, elevating the amplifier's sound performance.

ELNA Caps, Japan

Ensure enhanced audio clarity and stability, contributing to a richer sound experience.

Product details

Which Product is right for you?

Compare products to find the best one for your needs.

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
From $109.99

Fosi Audio V3 Mono Monoblock Power Amplifier

Type
Monoblock
Amp Chip
TPA3255
MAX Power Output
300W@4Ω
Input
RCA, XLR, ¼”TRS
Output
Speaker Output
Treble & Bass Control
No
THD+N
<0.006%
SNR
≥123dB
Terminating Impedance
2-8Ω
Power Supply
32V/5A, 48V/5A
Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio - Fosi Audio
From $109.99

Fosi Audio ZA3 Balanced Stereo Amplifier

Type
2.0 CH Amp
Amp Chip
TPA3255
MAX Power Output
2x 300W@4Ω
Input
RCA, XLR, ¼”TRS
Output
Speaker Output, Sub-Out
Treble & Bass Control
No
THD+N
<0.006%
SNR
≥106dB
Terminating Impedance
2-8Ω
Power Supply
32V/5A, 48V/5A
Fosi Audio V3 300W x2 2.0 Channel Hi - Fi Stereo Audio Amplifier with TPA3255 Chip - Fosi Audio
From $69.99

Fosi Audio V3 Mini Stereo Amplifier

Type
2.0 CH Amp
Amp Chip
TPA3255
MAX Power Output
2x 300W@4Ω
Input
RCA
Output
Passive Speakers, Pre-Out
Treble & Bass Control
No
THD+N
<0.003%
SNR
≥110dB
Terminating Impedance
2-8Ω
Power Supply
32V/5A, 48V/5A
Fosi Audio BT20A PRO 300W x2 TPA3255 2 Channel Bluetooth 5.0 Power Amplifier - Fosi Audio
From $79.99

Fosi Audio BT20A Pro Bluetooth Stereo Power Amp

Type
Bluetooth 2.0 Ch Amp
Amp Chip
TPA3255
MAX Power Output
2x 300W@4Ω
Input
Bluetooth, RCA
Output
Speaker Output, Pre-Out
Treble & Bass Control
Yes
THD+N
≤ 0.005%
SNR
≥ 108dB
Terminating Impedance
2-8Ω
Power Supply
32V/5A, 48V/5A
Fosi Audio M03 Subwoofer Amplifier
From $89.99

Fosi Audio M03 Subwoofer Mono Amplifier

Type
Subwoofer Amp/MoxAmp
Amp Chip
MAX Power Output
200W
Input
RCA
Output
Passive Speakers + Active/Passive Subwoofer
Treble & Bass Control
No
THD+N
≤0.03%
SNR
≥ 106dB
Terminating Impedance
4-8Ω
Power Supply
32V/5A

FAQs

Please read our FAQs page to find out more.

Customer Reviews

Based on 113 reviews
82%
(93)
14%
(16)
4%
(4)
0%
(0)
0%
(0)
J
James Chychota
Impressive Sound — Incredible Value in a Small Package”

The Fosi V3 Mono amps are genuinely impressive. I’ve paired them with my 4-ohm DIY Scan-Speak MTM speakers, and they deliver clean, detailed sound with excellent control and zero background noise. Imaging is tight, and dynamics are punchy — these little amps can really drive.

They’re running off two separate 48V/5A power supplies with USB-powered cooling fans. Even under heavy use, they stay cool and stable. Compared directly with my ICEpower and large Class AB amps, the V3 Monos hold their own — and for a fraction of the size and cost.

Only minor complaint: the LED ring brightness is inconsistent between the two amps. One is noticeably brighter than the other. It doesn’t affect performance at all, but it’s a cosmetic mismatch worth noting for perfectionists.

Overall, though, I’m thrilled with the sound and value. These are keepers.

M
Michael Dominguez

Fosi Audio V3 Mono Monoblock Power Amplifier

A
Andy Clandillon
Fosi Audio V3 Monos - first impressions

Hi all,
Got a set of four V3 Mons too bi-amp a pair of Heco floorstanders. The amps are just about broken in, and the resulting sound is open, very well staged, excellently balanced tonally and with great responses.
All in all, thoroughly recommended!

A
Anonymous
The only amp I’ll buy these days

Depending on the features you need, something else might work better but I just need clean, mono amps with no processing or extra features other than the auto on, which this has. I use them with my AVR and they work flawlessly. My speakers, AVR and ears are all happier every time I add one of these Fosi V3 Monos to the equation.

A
Abdullah Hamad
This little amp does wonders

The Fosi V3 Monoblock amplifier may be small in size, but it delivers power and clarity well beyond expectations. For the price and size, the Fosi V3 Monoblock is nothing short of remarkable. When paired properly, it delivers high-end sound with minimal distortion and rock-solid performance. It's proof that you don't need a massive amp to experience great audio