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Fosi Audio

Fosi Audio V1.0G 2 Channel Class D Mini Stereo Amplifier for Home Speakers TPA3116 50W x 2 with Power Supply

Based on 1,542 reviews
Condition: New
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$49.99
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Nov 4
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At a glance

Condition
New
Model
V1.0G
Dimensions
5 x 3 x 1 in
Material
Aluminum
Voltage
230 volts
Maximum Supply Voltage
19 volts
Minimum Supply Voltage
12 V DC
Warranty
24-month manufacturer

Features 5

  • Fosi Audio V1.0G mini stereo amplifier includes highly efficient, fully integrated, digital, class D audio amplifier ICs based on NEW amplifier technology, supporting a supply voltage range from 12 V to 24 V, allowing it to be used across home and professional audio applications
  • V1.0G 2-channel class D amplifier adopts Texas Instruments TPA3116D2 chip. The TPA3116D2 is a stereo-efficient and digital amplifier power stage for driving speakers, with an advanced oscillator/PLL circuit that employs multiple switching frequency options to avoid AM interferences. High performance effectively improves output power and audio quality
  • Advanced circuitry design, built-in speakers protection circuit, solid aluminum chassis, the home Hi-Fi integrated amplifier create clear and clarity sound, no audible noise, dead silent when nothing is playing through it
  • V1.0G stereo audio amplifier with very low power loss under all operating conditions. The ultrahigh power efficiency and cool operation make the V1.0G suitable for use in home audio systems

Description

2.0 Channels, Supports multiple audio inputs. V1.0G TDA7498E TB10A V3 TB10D ZA3 BL20A 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 20

Item dimensions L x W x H 5 x 3 x 1 inches
Voltage 230 volts
Manufacturer Fosi Audio
Maximum Supply Voltage 19 volts
Minimum Supply Voltage 12 V DC
Mounting Type Surface Mount
Number of Channels 2
Output Power 50 watts

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 4

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Top Amazon Reviews

Very satisfied, great sound and great value
AN UPDATE: I liked this tiny amplifier so much that I bought a second one for my office computer. Previously, my main computer used a Lepai LP-2020A+ driving a set of decent bookshelf speakers, and my office computer used a set of cheap USB active speakers. Later I bought the first Fosi to replace the Lepai on my main computer system, and it worked out beautifully (see the ORIGINAL REVIEW below). I decided I would use the Lepai on my office computer, and for that, I bought a set of Polk Audio T15, which are probably the cheapest slightly "serious" bookshelf speakers but should be far better than those cheap USB speakers. But within minutes of setting up the system, I felt terrible. It's not that the Lepai LP-2020A+ with the Polk Audio sounded worse than the cheap USB speakers. On the contrary, they were noticeably better. The trouble was that I started to compare the office sound with my main computer system sound, and I just couldn't help it. This is what happens when you get into a better system. It spoils you. On the office system with Lepai, everything sounded so hollow and distorted, especially the vocals and human voice recordings (not singing), which was so bad that I couldn't stand. It was painful. At first I thought it might be the Polk Audio T15s, but then I suspected it was something else, including the built-in line output, etc. Speculating all kinds of diagnostic possibilities was driving me crazy. Finally, I just gave in and bought a second Fosi, with a good DAC, planning to return the Polk Audio T15s for something better as well. Well, the Fosi and DAC came in, and I connected them to the computer and the Polk Audio T15s. What an improvement! Clearly, the Polk Audio T15s are fine (although not great). The culprit was the Lepai LP-2020A+ amplifier, as the Fosi made a huge difference. The following is the original review I wrote after about the first Fosi: ORIGINAL REVIEW: Unbelievable value for a small desktop setup or computer sound system. Everything is perfect. The sound, the functions, the build quality, and the appearance. This replaced my seven-year-old Lepai LP-2020A+, which actually had quite good sound on my computer sound system as well, but left me wanting a bit more. One of the obvious issues with Lepai was the highly noticeable noise floor when the volume is turned past 50%. Although I seldom turn the volume past 50%, the limitation is bothersome. After seeing some reviews on the TI TPA3116D2 chip, I decided to upgrade, to just give me a bit more peace of mind. And I am very satisfied. The Fosi sounds great. To be honest, I did not do a side-by-side comparison with the Lepai, but I am pretty sure Fosi delivers cleaner and fuller sound. The noise floor is much lower. It is quite low even if you turn the volume all the way up to the maximum. On my desktop speakers, I can hear no noise when the volume is below 30%. Once it passes the 30% level, the noise floor steps up abruptly, but strangely enough, it stays quite flat after that and does not further increase too much even if you turn the volume all the way to 100%. Even at the maximum level, the noise is only slightly noticeable when I sit about five feet away from the speakers. This is a near-field environment, and I'm fairly picky about the noise, but still, this is completely manageable. A day-and-night difference compared to Lepai LP-2020A+. Fosi comes with a rather large power supply, which may seem unnecessarily large, but is necessary for its 50W x2 power rating. When it comes to power, you simply don't have any way to cheat. For example, having a 30 W power supply for 50 W x2 = 100 W amplifier will inevitably lead to insufficient amplification and distortion at higher volumes. Also, the fact that Fosi has five-way binder posts for speaker connectors is a plus, much better than Lepai's primitive clippers. I did hesitate in choosing between the Fosi (this unit) and Micca OriGain A250 or OriGain AD250. OriGain A250 is $20 more expensive, not a lot in the dollar amount, but one-third (33%) more in relative terms, which becomes a matter of principle, if not affordability. Still, I almost got OriGain A250 instead of Fosi V1.0 because the A250 has slightly better user review ranking, and I desired peace of mind. But then I saw reviews that mentioned OriGain A250's having heavy bias on the left channel at low volume level. That bothered me as I usually listen to background music at quite low volume levels. OriGain AD250 had its own attractions because it had a built-in ADC and USB sound input. However, in the end, I decided not to go that route because integrating ADC may appear convenient now but could be an invitation for trouble further down the road. What if the built-in ADC develops problems? (I did see one reviewer mentioning OriGain AD250's built-in ADC has a signal synchronization problem). Or what if you want to upgrade ADC? Etc. Anyway, I'm glad I settled on the Fosi. It leaves me wanting nothing more for my computer-based desktop system. ... show more
Reviewed in the United States on November 10, 2018 by Gao Atamazon
Clean Sound, Solid Power, and a Great Price
The Fosi Audio V1.0G is a fantastic little Class D amplifier. I was genuinely impressed with how well it performs for its size and price. I paired it with some very efficient speakers and a separate phono stage for my daughter’s record player, and it turned out to be exactly what we needed. The sound quality is clean and surprisingly full. It delivers more than enough power for a small to medium room when paired with efficient speakers, and it does so without distortion or harshness. The simplicity of the 2-channel design is a big plus here — no unnecessary features, just volume control and solid amplification. For a compact amp, it feels well put together and runs cool. This is a great option for turntables (with a phono preamp), desktop audio, or any simple stereo setup where you want good sound without spending a lot of money or taking up much space. For the price, it punches well above its weight. TL;DR: Excellent small Class D amp with clean sound and plenty of power for efficient speakers. Simple, affordable, and perfect for a basic 2-channel or turntable setup. ... show more
Reviewed in the United States on December 27, 2025 by P. Wells
A lot of good, quality sound in a tiny package. PERFECT for high-efficiency speakers
So, I bought this little unit in 2020… 4 whole years ago… and finally found the time and the need to use it. Boy am I pleasantly surprised. Paired with my various Klipsch speakers (mostly using my giant corner horns at the moment), this amp sounds amazing. It really does. And I'm quite nitpicky when it comes to sound quality. I'm used to various amps, including vintage Sansui, Marantz, Kenwood receivers and vintage and newer Mcintosh, which all sound different. I'm using an (too expensive) ADI 2 Pro DAC converter that has phenomenal sound reproduction characteristics, so if the end result is anything less than great, it's this little amps fault. I'm glad to say that it sounds very crisp and clean, very much like the Sansui AU-919, which was designed to provide very faithful reproduction of the original music. In fact, it sounds just as good as my AU-919. It is the exact opposite of the "warm tube amp" sound, similar to the sound that Marantz and Macintosh amps are known for. If that's the sound you're looking for, this isn't the amp. You could use a preamp to tweak the sound, if you wanted to, I suppose. The most important thing to remember is that this amp is "only" 50 W, so the more efficient your speakers, the better the sound is going to be. Klipsch speakers can get very loud with just a couple of watts of power. I have a 17 W tube amp and I can't turn the volume more than 50% or the sound will be so loud it's unbearable. So 50 W for my speakers is more than enough. If you have speakers that NEED 50 W, you probably will need something more powerful… and there are different models of this amp that will work better for you. This amp would be perfect with a surround sound system… One amp for each channel. Now that I know how well this unit works, I will definitely be buying a couple of more of them to add additional speaker pairs. I've seen some others say that their unit gets really hot. Mine doesn't… not at all. Probably because I'm not using all 50 W. This goes back to pairing it with the right speakers. I set the volume on the amp to 50% and then adjust the input to get additional volume. If you are having to run the volume on the amp at 100% all the time, you definitely need an amp with more power… 100 W or more. ... show more
Reviewed in the United States on November 4, 2024 by Texas Son
Amazing
This thing is serious so perfect. I use it for my computer with some JBL passive speakers, and man. This thing can carry bad speakers and probably makes good speakers even better. The volume dial is a good size too and convenient.
Reviewed in the United States on August 27, 2026 by Douglas Keppel
Works, could be better built
Works as advertised. Some cosmetic quality control issues are apparent, but its a solid choice otherwise.
Reviewed in the United States on June 17, 2026 by Bob Green
The Best Amplifier For Its Price Range
Review Image by mysterio
I bought this amplifier to connect my passive Sony tower speakers to my turntable, and it is an amazing amp for its price. Compared to other options in its price range, this amplifier is leagues better than anything else on the market. It was fairly simple to set up, and due to its small footprint, fits amazingly in my compact setup. The sound quality on this amplifier is impeccable. It is dead silent when no music is playing, and there’s no humming or noise that interferes with the sound at all. Also, it looks great. It has a sleek design and a nice metal finish, along with great build quality, and it’s a perfect addition to any stereo setup. ... show more
Reviewed in the United States on June 7, 2026 by mysterio
EXCELLENT solution for inexpensive desktop monitoring
With some repurposed used home theater speakers, this thing provides a FANTASTIC solution for home office desktop sound! It has more than enough power to drive efficient home theater speakers LOUDLY with volume knob barely cracked. Which is, actually, my only minor complaint-- this knob almost seems linear, rather than logarithmic. I only wind up turning it through about 15 degrees to go from off to blasting-- but it does so smoothly and cleanly. I am not willing to see "how loud" it will go-- both these speakers and this amplifier are game for more than I am. I have two old BIC Venturi surround-sound speakers that I use for near-field monitoring. These are findable on eBay and thrift stores from time to time-- and they are EXCELLENT. I had been driving four of them with a big ELAC center channel... as... a videoconferencing setup. The idea was that I could be anywhere in my office and still get good audio. Anyway, long story short, it was total overkill, took up a ton of room, and was a wiring nightmare. Now I have the Venturis hooked up to this amp, running off a Focusrite Scarlett USB audio interface, itself on a USB switch connected to multiple machines. Whatever I'm on now has amazing sound, and I have a ton of room back and far less cable management. The amplifier itself is TINY, fits under my monitor, and doesn't even get warm. This new generation of power amplifiers is really something else-- >90dB SnR, etc. Phenomenally clean sound with a good audio source. Literally so transparent there is no point in turning it off when you're not playing something. I can't believe this thing is $50. Sometimes I really love living in the future! ... show more
Reviewed in the United States on September 1, 2022 by M. C. Heck
Perfect for home practice setup
Review Image by Tim Sedgwick
This is a real cool little amp and the perfect solution I was looking for to power my practice setup. I previously had a larger PA amp and when it died I went searching for something compact, clean and low noise. The Fosi Audio V1.0G was the perfect fit. Great deal - highly recommended.
Reviewed in the United States on September 5, 2026 by Tim Sedgwick
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