It is open box. Cheatding.

Relação preço qualidade, Top

Bon ampli pour l'usage que j'en ai, à savoir sonoriser un téléviseur. Il fait très bien le job. Volume sonore amplement suffisant, mais ça, ça dépend beaucoup du rendement des enceintes, pas juste des watts de l'ampli.Content de cet achat à petit prix.

As others mentioned it's very good quality and value. After several years using it still works great. No regrets, will buy again.

I have had an old set of Dell PC Speakers (2 speakers plus a sub-woofer) for many many years. They were quite well made and had an adequate sound (volume and quality) from my computer - mainly listening to Spotify.However they stated to fail with increasing noise, static and fading volume - it may be just a dirty volume control but I was not sure so I had been looking for a replacement for some time, but nothing really looked like what I wanted - everything these days looks quite cheap and plasticy.However I also had a pair of Wharfdale Diamond 2 speakers from my old (no longer used) stereo system. These are actually relatively small but high quality speakers so I decided that a better strategy might be to deploy these speakers with a (physically) small amplifier and came across this Fosi device.I left this in my basket for a long time as well but finally got it on an Amazon discount week making it much more reasonably priced.I was not sure what to expect as I had used the speakers before with a traditional large Pioneer traditional (and large) stereo amplifier.This device is tiny - much smaller than I expected - the power brick is about twice the size of the amplifier! The photos show that the connections at the rear fill the panel.I also bought some banana plugs for the speaker cable (some quality QED flat twin and 3.5mm jack to phono cable and connected it all together.I really am impressed with the quality of the sound output with these speakers. I have had the volume at the maximum setting and it was really clean and clear, with a decent frequency range (using the Realtek graphic equalizer application) and minimal distortion, so I am pleased with the outcome and it reuses my speakers that had been in the loft for yearsIn terms of the amplifier, it doesn't get hot even when running at high-output for long periods of time. It's quite well made - a reasonable level of perceived quality. I had one trivial issue that the volume knob fell off but it just needed the grub screw tightening a little more. I think the the power switch seems a little lightweight and could have been a little more robust looking but these are minor nitpicking issuesReally happy so far.

Lo usé para mejorar el audio de una pantalla

I love this amp! I needed a small profile amp for my desk setup and this works very well. I feed the input from a small mixer and the output goes to a pair of small bookshelf speakers. Beautiful/clean audio with no hiss when there's no input. Having a tone control would be useful at times for my application but overall I'm very happy with this amp.

Amp is tiny, and delivers serious enough power to drive my tower speakers. Time will tell if it proves reliable though. I had a Lepy LP2020 amp before that failed due to a complete lack of thermal management in short order.Build quality of this seems FAR better. Very good knob feel, connectors are sturdy.As for sound quality, that usually has a lot more to do with the driven load than the amplifier, but so far this is delivering crisp highs, excellent mids, and very decent bass. I haven't turned it up as far as it will go because my neighbors would likely complain, but I'm quite satisfied with it.

I am using this amp to power two outdoor speakers (Polk Atrium 4s), slaved to my main home audio system. It works very well as a simple amp with a volume control. It does not have any other features, but does amplification reasonably well. It is rated at 50 watts, which I am not convinced it is producing, but this is quite subjective as I have not compared it against anything else. I base that simply on the level of sound I'm getting out of the speakers at full volume. Having said that, there was no distortion at full volume, so this is a very good thing. I can recommend this small amplifier for simple extension of analog home audio.

I am a retired electronics engineering technologist and have been around audio all my life, from homebuilt systems to precise and thorough audio analysis at work. I use the amp to drive 5"+tweeter bookshelf speakers from a computer line output. It's nice and quiet. It doesn't add any subjectively noticeable hum, hiss or any other distortion. I manually swept the amp (into 8ohm resistive loads) using a high end generator and some PC oscilloscope modules and didn't see any noticeable frequency spectrum peaks, suckouts, humps or droops. Mechanically the unit is solidly built, has a hefty weight to it (for its size), and rubber feet so it doesn't slide around. And it has a very silky smooth volume control (akin to the very smooth controls on the old 70's preamps). Lack of tone controls is not a problem, I just use an audio equalizer program for my Windows desktop. I prefer it that way. Less electronics to alter the sound or add noise. Just a straight through amp. Speaker terminals are small (they have to be on such a compact unit) but seem durable and take bare wire or standard banana plugs. The RCA inputs are solid feeling and without that cheap scratchy feel when plugs are inserted. I saw that some reviewers complained about sparking at the power input (that did not occur with my unit). If you're worried about that then just plug the power plug into the back of the unit first, and *THEN* plug the power pack into the AC wall outlet, and leave the power stuff alone after that. The front power switch works fine. I had to add a little whiteout dot on the volume control so I can see where it's set. That's so minor it's hardly worth mentioning. And after all that, it even looks good!

I like this thing for the price, the size, the clean look, and the big volume knob. Having said that, there are a couple drawbacks. The main problem I have is a quiet but noticeable hiss when the amp is powered but nothing is playing. The hiss is present when nothing is connected to the amp, so it is internal in the unit. The volume of this noise increases with the volume setting. The other problem is that the volume control is of such poor quality that there is a noticeable static noise while adjusting the volume. Kind of like on older equipment, except this is a brand new unit.If you can accept these flaws I would still recommend it.

Edit: I've now been using this to drive my speakers for 4 years. Ive moved with this amp 4x including bumping it across the country in my car. It works perfectly. This is an unbelievablely good product for the price.Nothing negative too say about this product. If it doesn't last long term I will update my review.So far, after 3 weeks, this product is too good to be true. I use it to power 2 high quality pioneer speakers rated at 150W each, and at 1/3 volume, they pump out more volume than I need. This product has some SERIOUS kick. It doesn't heat up, it works exactly as described, and for the price AND the quality, this is an absolute steal.If you're looking for a DAC/AMP combo, do not hesitate. Amazing sound quality. Have nothing negative to say. The rear speaker winding posts are highly adjustable. If I had a single negative, I wish it fit the Banana plugs I have, but that's not a fault with the product itself.LOVE IT

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.