Fosi Audio DA2120A Bluetooth Stereo DAC Amplifier with Subwoofer Support

I needed a cheap, tiny amp with an optical input to power a couple of Polk Atrium speakers outdoors, using a TV as the source, and this worked pretty well. I attached it to the back of the mounted TV, so it's hidden, and used an IR repeater to get remote signals to it, since they won't pass through the television. My only major complaint is that FOSI doesn't show up as an amplifier brand if you're trying to program audio control into another remote control (like a Fire Stick). You have to use the included remote, which isn't great, or very convenient. I emailed Fosi to see if another brand used the same IR codes, and they said they'd check into it, but I haven't heard anything back from them. Also, FYI, using the TV as the source, I had to change the audio output to basic stereo, because I would get weird fluttering static if I tried to output anything else.

I bought this after having a terrible experience with the SMSL AD-18 desktop amp a few years ago. That amp would explode my ears intermittently with loud bursts of static and SMSL basically ghosted me when I attempted to get in touch with them about the issue. Reading other amazon reviews I found I wasn't the only one dealing with that issue.After eating that mistake, I carefully combed reviews and arrived on this unit which is size and price comparable to the pile of garbage SMSL I had before. And I am pleased to report: it's worked great for the last 3 years and doesn't jump scare me every other day with static bursts. I'm using it over TOSLINK as that's the cable I had handy at the time and it's been flawless. I've also used it over USB and that worked fine as well. I'm using it with Micca MB42X bookshelf speakers and while it doesn't get insanely loud, at 70% volume it's about as loud as any rational person would have it in a desktop use case. It would be nice if it got a tad louder for when you're playing content with relatively quiet audio.It also has a good variety of inputs which is helpful as I can swap between my PC, laptop and Xbox with the push of a button. HOWEVER, the means by which you swap inputs on the unit itself is a total afterthought and actually super annoying in daily use. The only physical button on the unit is the volume knob which also pushes in. Switching inputs is one short press. The reason this is an issue is when I blindly reach for it to adjust the volume, which I do very often, it's incredibly easy to accidentally press the knob in and switch to a dead input.Switching back to correct one involves clicking it 5 times to cycle back to the one I was just using. This could be easily solved with a firmware change. Lock input changes behind a double knob click and then turning it to switch inputs. Thankfully, if you mainly use the remote, the above complaint is not really an issue. My problem with the remote is it's much slower to make big adjustments than the knob. Were it not for awful control scheme, I would easily give the unit 5 stars.One final note, I bought this 4 years ago and for a chinesium desktop amplifier it does strike me as being a bit overpriced in 2024. There are probably better options available, but this one gets my soft recommendation for not being manufactured e-waste like the SMSL unit I mentioned at the beginning.

With the right speakers this little amp curbs your need for a big surround system. The remote control seems very flimsy. Afraid I'll break it if I push too hard.

Es pequeño, bonito, tiene dac, sonido excelente y potencia suficiente para escritorio, tiene control remoto, y no tiene esos interruptores feos y de mala calidad que con el tiempo se dañan (Douk M1 Pro y otros Fosi, Aiyima). Honestamente, nunca más vuelvo a parlantes activos, vengo de probar unos Dayton M4 y no quedé satisfecho.Es suficiente para los Micca OoO que inicialmente probé, luego pasé a los RB42 los cuales son superiores sin ninguna duda, tienen mejor claridad y los bajos no son forzados como en los OoO, y de hecho si llevo el volumen al maximo estos RB42 comienzan a distorsionar un poco, especialmente en las bajas frecuencias.Lo tengo conectado por USB a mi computadora Win10, no necesitás drivers. El bluetooth también suena excelente no detecté diferencia de sonido, esto debido al codec Apt-X HD, recuerda que ambos dispositivos deben usar el mismo codec para que te beneficies de ello, en cuanto a distancia me alejé lo más que pude y no tuve ningun problema de señal usando mi viejo Samsung Galaxy S10e.

Used for computer audio.Nice to have a single unit with DAC, amplifier, tone controls, remote and subwoofer out (RCA). Multiple input sources including Bluetooth. Preset EQs are not very good. Adjust the tone controls manually.