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Fosi Audio

Fosi Audio V3 Stereo Amplifier Home Audio 300 Watts x2 Power TPA3255 Class D Mini Speaker Amp 2 Channel Audio Component for Passive Bookshelf Tower Speakers Desktop Home Theater with 48V Power Supply

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Availability: In Stock.
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Arrives Thursday, Sep 10
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Model: V3_48V/5A


Features

  • Compact Yet Powerful: The V3 mini power amplifier combines a minimalist design with exceptional performance. With a power output of up to 600W, it can effortlessly drive 2-8 speakers, delivering impressive sound quality. Its compact size makes it suitable for various applications, from bookshelves and desktop setups to home theaters
  • Audiophile-Grade Components: It features the TPA3255 high-end digital class D amp chip and utilizes premium Japanese NCC, ELNA, and German WIMA capacitors, and Japanese Sumida inductors for exceptional audio quality. With a SINAD rating of up to 88dB, an SNR of up to 110dB, and a low noise floor of only 140uV, it delivers exceptional clarity and low distortion
  • Scalable and Fun: Tailor your sound experience by swapping the stock NE5532 op-amps. V3 is compatible with a variety of 8-pin dual op-amps like Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4559, LM4562, LME49720HA, etc
  • Enhanced Pre-out Functionality: The V3 features an optimized "Pre-out" design. The level is now controlled by the volume control, allowing for adjustable sound levels when connected to the "Pre-out." This enhancement offers greater flexibility and convenience for users who prefer to fine-tune their audio experience

Description

Integrated quality components and groundbreaking heat dissipation design enable high and stable performance catering to audiophiles' demand. Using a minimalist design language, focusing more on enhancing the sound quality and performance of the product, making it the best-sounding power amplifier of Fosi Audio to date. Enabling superior audio quality & ultra-low distortion across the audio band with Class-D efficiency Compatible with 8-pin dual op-amps. Roll them to get your preferred sound signature Built-in quality Japanese NCC, ELNA, and German WIMA capacitors for outstanding performance Professional audio inductors which have lower impedance and enables support for larger currents Manage the volume of sound in a much finer way suitable for the human ear Vents on the top and bottom, and whole-body heatsink design enhance air circulation and cooling the V3 amplifier delivers a cleaner sound, preserving the original audio characteristics. The "Pre-out" level is NOT controlled by the volume control. V3 V3 Mono ZA3 TB10D BT20A Pro BT30D Pro TP-02 Fosi Audio S3 HiFi Music Streamer DAC Preamp TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2 Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide.

Manufacturer: Fosi Audio


Brand: Fosi Audio


Built-In Media: Power Supply


Model Number: V3_48V/5A


Mfr Part Number: V3-48V


Unit Count: 1 Count


Warranty Description: 24 Month Manufacturer


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Sep 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Great little amp for the money.
Model: V3_48V/5A
Ordered the Fosi V3 to replace a Fosi 20a I had purchased some time ago. The main differences are, the V3 is a more simplistic setup, promises more power per channel, and uses high quality parts internally. It can come with either a 32 volt or 48 volt power supply. Opt for the 48 volt power supply, you will not regret it. The larger more powerful power supply will get you higher volumes with better quality output On the back side of this unit are connects for a pair of speakers and an analogue input. The older Fosi 20a just did not have as much power particularly with only the supplied 24 volt power supply and fell short driving my Polk Atrium 6 speakers at loud volume. Now, I am using this as a garage system. Hence, the reason I chose to go on the cheap with this system. But....the Fosi V3 got decent audio reviews so what the heck. The garage system is a music system to accompany working on projects or the cars vs. just sitting and listening to music like I do with my home systems that cost much much more. So after connecting up an older generation Echo device to stream music, I used 14 gauge audio cable to connect the speakers to the amp. Very easy to do. The result is as you see it in the attached video. Loud enough for me and the overall sound quality is very good. So, this unit has few connectivity options but what it does, it does well. What I really like about this amp is its small size allowing me to store it in my garage wall cabinet. I would imagine this amp could be part of a home system in a small to mid size room Just be sure to match it up with a pair of good speakers. Speakers with a high efficiency rating will serve you best that is 90db or better. Recommended. ... show more
Reviewed in the United States on February 1, 2025 by JH
    • Fantastic simple Amp, very little to improve on
Model: V3_48V/5A
Very clean amp with solid headroom — honestly more than enough, almost too loud for my setup. Running it on Polk Atrium outdoor speakers and it sounds fantastic. Beautiful, clean sound. Also really like the look of it. The volume knob is a nice size, feels just right to turn. The unit itself is a bit bigger than I expected, about the size of a novel. Power brick's kind of huge too, but it comes with a long cable, so just tuck it behind something and you'll forget it's even there. What I really love is how dead simple it is. There's no way to screw this up. I leave it on all the time — being class D, I'm assuming it's pretty low power draw, though I haven't actually measured it. If you want an affordable, no-BS amplifier, this is it. I'm looking at picking up a nice pair of bookshelf speakers soon, and I'm already having a hard time justifying spending more on an amp than this. Only nitpick, and it's a small one: if you're picky about tone, you might want an inline EQ. Honestly, if this had a built-in 10-band EQ for $50 more, I don't think I'd have a single complaint. ... show more
Reviewed in the United States on July 10, 2026 by Mark
    • Great product and value!
Model: V3_48V/5A
Purchased this as a replacement to a much higher priced mainstream brand. The sound works as good if not better, use this for a couple of surround speakers. Highly recommend and runs cooler.
Reviewed in the United States on June 17, 2026 by N. TX SMT
    • Clean sounding, but...
Model: V3_48V/5A
My check of this amp revealed that it has a very clear, clean sound. But there are no tone controls and the bass had no character. I'm confident that upgrading the op amps would improve it, but the upgrade I had on hand was from SparkOS and *these require risers to physically fit*, which I did not have. I don't think power to drive reasonably efficient speakers is a problem, but almost all of the Chinese class D amps absurdly overstate their power. They can't deliver 300 watts into any impedance speaker if the power supply is only 240 watts, eg 48 volts X 5 amps. ... show more
Reviewed in the United States on July 1, 2026 by Tim
    • Great amp, tons of clean power for your speakers.
Model: V3_48V/5A
Puts out much more power than I was expecting. I have 2 JBL Full cabinet bookshelf speakers, and I used this to hook them up to my PC. BLOWS away PC speaker kits that cost hundreds of dollars. Put out enough power to put them to their limits, Cant even max out the power on the amp, 75% power is enough for me to hear the sound ANYWHERE in my house. The sub out works perfect, hooked up an old 10 inch sub I had and its the perfect combo. ... show more
Reviewed in the United States on May 17, 2026 by Mike Paulus
    • Great sound
Model: V3_48V/5A
Sounds excellent! Works well to plug my keyboard into unpowered speakers and subwoofer. It initially caused a loud pop on the sub when turned on, but that went away when I set power to auto on the sub. Now, I can leverage the synth engine of my seqtrak instead of the abysmal sound of my Casio.
Reviewed in the United States on May 27, 2026 by Jake Hamilton
    • Class D Warmth
Model: V3_48V/5A
So far so good. Runs warm compared to other class D amps. The 48v power supply makes it run hotter than 32v , supposedly. Sounds clean and airy paired with Sony SS-CS5M2 bookshelf speakers Update: Returned and replaced with Fosi V1.OG that stays cool during use. V3 was always warm just sitting there. Really didn't need that much power. ... show more
Reviewed in the United States on June 29, 2026 by dh
    • Grossly overrated power ratings but...
Model: V3_48V/5A
Great sounding amp in a very small package and clean with good channel separation. However, this is nowhere near 300w per channel as rated. Maybe 80 per channel? I'm not sure how they rate these but the number is grossly exaggerated.
Reviewed in the United States on July 16, 2026 by Joseph Tanguay

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