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.
Arrives
Sunday, Nov 1
At a glance
- Condition
- New
- Model
- V3_48V/5A
- Built-In Media
- Power Supply
- Mfr Part Number
- V3-48V
- Warranty
- 24 Month Manufacturer
Features 4
- 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 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.
Specs 7
| Manufacturer | Fosi Audio |
|---|---|
| Brand | Fosi Audio |
| Number of Items | 1 |
| Built-In Media | Power Supply |
| Model Number | V3_48V/5A |
| Mfr Part Number | V3-48V |
| Unit Count | 1 Count |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 1
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
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.
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Reviewed in the United States on July 10, 2026 by Mark
Surprisingly excellent
Model: V3_48V/5A
I was a bit skeptical of the claimed 300 watts x 2 at 4 ohm, so as a quick test I hooked this little amp up to a pair of Magnepan LRS speakers, which are legendarily power-hungry, and to a Marantz CD player. Surprisingly, this amp has no problem powering the Maggies at volume, and the sound is remarkably crisp, clean, neutral, and accurate. I normally power the Maggies using a pair of 400 watt Emotiva monoblocks, and the Fosi, though not as powerful as these monsters, is acquitting itself very well indeed. Of course, you do not get bass and treble controls or an onboard DAC, and you only have one (analog) input. Oh, and do get the 48 volt power supply instead of the lower voltage option. Still, you just broke one hundred dollars, and you are getting a lot more than you paid for. Possibly the best bargain in stereo gear today. Match this amp with a pair of ELAC Debut speakers and a WiiM streaming device and you would have an audiophile-quality stereo for very little money.
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Reviewed in the United States on August 18, 2026 by NoneTheRicher
Ideal for setup
Model: V3_48V/5A
Nice little amp, plenty of power (48v supply), well constructed and at a price hard to beat. My setup is simple - includes DAC and preamp feeding the V3 with Dayton audio B65 speakers, in a near field application. Sound in this minimalist configuration is better than expected (speakers much better than expected). V3 doesn't break a sweat - loads of headroom - opportunity for speaker upgrade. Hope it works for me for a while - time will tell.
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Reviewed in the United States on September 22, 2026 by dude
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.
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Reviewed in the United States on July 1, 2026 by Tim
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.
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Reviewed in the United States on February 1, 2025 by JH
Not home theatre quality but good
Model: V3_48V/5A
I was looking to free up some space as I was using a whole home theatre to drive two bookshelf speakers for music. I won’t lie there is an audible sound quality and of course the home theatre receiver takes the fake. But for being 10% its size and the price, it does its job. Again was just looking for something smaller and portable to be able to connect some bookshelf speakers as monitors for dj gigs. Update: I am returning the item. I connected smaller speakers to it but still not satisfied. Some genres sound fine like edm and hiphop, but live instruments etc not as great for the most part. As an open format and event dj I need a flat response all together. It was all fine with my home theatre just not something ideal I can show up with an event for monitors so for now I’ll prob just mix in headphones until I can find a more portable alternative that will likely be a bit bigger and cost more than this. Still obviously better than ur average Bluetooth or pc speakers setup.
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Reviewed in the United States on April 8, 2026 by Javi
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
Crazy power for its size
Model: V3_48V/5A
This thing is such a killer amp. I was running my stereo using an onkyo tx-905 receiver from the late 80s, an this one just does such a better job that it’s not funny. There’s so much more clean power to recreate bass frequencies that I almost don’t think I need a subwoofer. Almost.
Reviewed in the United States on July 19, 2026 by Chris