Fosi Audio V3 300W Class D Stereo Power Amplifier, TPA3255 Chip HiFi Audio Amplifier for Home Theater and Bookshelf Speakers, Compact Design with Advanced Heat Dissipation with 48V5A Power Supply

An amazing amplifier given its size and price point. Properly set up, run in for 24 hours and with a decent Hi-Res Audio signal input, decent cables and suitable speakers and it makes music. The sound is very clean and detailed with no harshness or sibilance. The flat signal response reveals a lot of detail in the music. Not weighted to either end of the frequency range. Very dynamic, good fast attack on solo piano - always a difficult one to project realistically. Not a sound that is aggressive or wearing to listen to. Choosing matching components to provide a balanced system is important, so give it an MP3 input signal you get what you get - medium results, not Hi-Fi. As always one is listening to the system, not individual components. System matching very much matters to the tonal colour especially with cables and speakers. Certainly changing the speakers to +£1000 Spendor, Monitor Audio, Mission etc would unbalance the system and reveal some short-comings - but that would be to use this amplifier far outside its scope of system. One comment I see on several other reviews is the volume control level position ... In my opinion, this knob should be pulled off and set to the 6 o'clock position with the amplifier off (a bit like some older Naim units). Them when the unit is turned on, the volume control rate and progression are correct, in comparison with most expectations with minimum volume around 7 and 10 - 11 being a fair listening level. The 48v PSU now supplied with the unit is capable of providing the dynamic transient peaks without strain, providing adequate reserves and control to avoid 'smearing' of fast pieces and allow quiet passages to feel realistically contrasted with a wide dynamic range. The simplicity of single input and dispensing with tone controls means fewer sound compromises, and gives a superb perfomance far above the expected quality at this price. Enabling you to stop spending more cash on Hi-Fi and spend more on the music itself. Very enjoyable music-making and Very Recommended!

Well built. High quality components. Easily drives a pair of 8 Ohm tower speakers to loud levels without perceptible distortion. Volume control is tapered (logarithmic), not linear, so if you want to crank up the sound you should not be afraid to turn it up close to maximum. That is how it is designed (to give you most precise control over the lower to mid range volumes) but needs getting used to. Overall this is the best value amplifier I have ever bought. If you need more inputs/outputs, a remote control and tone controls, this is not for you but if you simply want to amplify a single signal source, with high fidelity and no appreciable distortion, to listen with passive speakers then this is the one to buy!

After a recent house move I'm now faced with an awkward multiroom setup up issue as running long cables is problematic. The solution was running the pre-amp out of my main amp into a wi-fi transmitter reciever setup up meaning I needed the most basic of integrated amps to power my remote speakers. After much searching I found this and was sold simply on the functionality, i.e. one source input, volume control and speaker connects.... and nothing else. Then I started to read it might actually be a pretty good sounding amp... It arrived today and after a bit of jiggering it's now bypassing my main amp and powering my main speakers and whoosh! Yeah, there are some differences between the v3 and my CXA81, but you'd want there to be when one is nearly 10× the price of the other. Bass is suitably punchy, soundstage appropriately broad... it's all very impressive for the money. If there's one flaw it's that is a bit precise in it's presentation, but then I've only rum it for 20 minutes, so it's not fun in yet, so who knows? Oh, and I went for the 48v/5amp power supply due to some reports saying without it it can struggle to drive bigger speakers/create suitable volume. Must say these may be unfounded. I'm running the Fosi at about ¼ to ⅓ (you might be able to spot it in the photo) and I'm getting about 65 to 70 dB around 15-20cm from my old Celestions, so that's plenty loud enough for me. Need something that will power some speakers from one input, and had no other functionality... this is certainly going to do the job!

Great Class D amp, very powerful (more than enough for most high end speakers) and very low energy consumption comparing to much bigger Class A/B amps. A truly fantastic product for the price so excellent value. Solid build quality, compact and does not overheat.

I purchased the 48v power supply version, using to power a pair of mordaunt short 902 speakers, this is the first hi fi amp i have purchased in decades, replacing an old technics AV amplifier which was roughly 100 times larger than the V3 and ridiculously heavy compared to the fosi. Running a wiim pro plus through the amp and speakers the set up sounds phenomenal, this amp clearly does its job perfectly no noise or hum while the amp is silent, and the V3 is able to get extremely loud without struggling remaining very composed in a 4 x 5 metre room. In fact i haven’t taken it to its full volume. Amplifiers are used to do the job of amplifying a signal, any alteration in sound is usually do to their shortcomings, in this case i cannot find any! On louder volumes i leave the eq off my streamer while listening to music through the V3 and apply an eq at lower volumes, the V3 outputs sound like it is, neutral and without flattering your chosen input, as the amp has no tone controls and just 1 input as in my case a good preamp with multiple inputs and ability to shape the sound to your choice is ideal. This little amp is a bargain and at just £109.00 on an amazon offer, wow!! I should mention that on first turning on the amp and moving the volume control a low level crackle is just audible,after some research this is not a problem but inherent to this model, as power is applied to inner components.The remedy is too simply switch on and leave for 4 seconds then move the volume, no problem!

I bought this class-D amplifier, mainly as a backup for my 340W per channel power amp. Needless to say, conventional amplifiers of this type are very heavy and designed for rack mounting, whereas this little Fosi Audio amp, fits in the palm of your hand, and is as light as a feather, by comparison. It came with a 5A, 48V, power supply, however, if you want to get the full output (300W into 4 ohms), then you should consider purchasing the amplifier and a 10A, 48V power supply separately. But don’t worry, even with the 5A power supply, it still chucks out around 200W, with a good frequency response and some gut-thumping bass. And, as you probably know, sound is logarithmic… i.e. for a noticeable increase in volume you need to double the output, so this is still a good deal, and the quality of sound is pretty darn good. This is a very portable, no-frills power amp, that you can either use in conjunction with a mixer, as a PA, or simply connect it to your phone or laptop and enjoy the music! 😊 Highly recommended.

Fosi V3. There are plenty of reviews and videos out there by people way more qualified than me on this and other Fosi HiFi equipment so go and check them out for the technical info. My opinion is that it gives a rich warm sound and through a set of NEUMI BS5 speakers I am really happy with the output even when at max volume. I have combined the V3 with a Fosi Audio BOX X3 Bluetooth 5.0 Hi-Fi Tube Phono Preamplifier for MM Turntable. This gives me a little more control with the bass and treble controls, but great connectivity to streaming with bluetooth and Amazon music HD. The increased gain is also much better than my previous phono preamp. If you want quality at a great price look no further. As a side note I had some questions and queries for customer support. They answered quickly and politely which made a welcome change.

I neeeded an amp to use for extra speaker sin my system and laso one for dual transducers for bass rumbles. I got 2 Fosi ampsfor each task. Botht he amps have worked well adn are really affordable. The power rating needs a bit of reseach though but I didn't have to be too critcal for the aplications I was using. The sound clarity on the amps are pretty reasonable and give good sound reproduction. I did find that I need to source the larger power packs though to get the most out of these amps adn so eoither buy witht 48 volt pack or factor as a likely extra dependant on your needs.

I'm a music lover and this makes one of my favorite music devices. Delivers the best sound quality for me. Recommended.

Utilisé pour avec des enceinte spassives Q acoustics 2020i, après avoir tenté un TEAC et un Denon PMA60, le Fosi audio brille par sa puissance sans compromettre la clarté de la musique. Le son est beaucoup plus clair que sur les deux chaînes sus mentionnées qui m'ont coûtées 4 fois plus. Il ne chauffe pas ou peu. L'allumage se fait par le bouton de réglage du son, et celui-ci donne une bonne sensation de résistance (souple mais pas trop) lorsqu'on le tourne. Il y a un très léger crachement à l'allumage, mais pas de violent "pop", et aucun son à l'extinction. Equippé d'une sortie enceinte et d'une entrée RCA (je n'est pas testé la sortie "pre out"), il n'offre que le minimum syndical et nécessite une installation DAC/CD/PC pour lire du son, mais la différence de prix permet de se payer du matériel spécialisé beaucoup plus performant que sur les chaînes HIFI multitâches "tout en un". L'ensemble revenant beaucoup moins cher pour une qualité bien supérieure. II ne pèse que quelques centaines de grammes et tient dans la paume de la main, les câbles peuvent d'ailleurs le tirer vers l'arrière et c'est à prendre en compte dans votre installation. Quand l'appareil est éteint, le transformateur 48V reste allumé -prévoir une prise à interrupteur.

Premetto che sono un audiofilo da oltre 40 anni e ho avuto anche impianti di un certo livello. Da un pò mi balenava in testa di ripristinare le vecchie Linn Tukan, diffusori audiofili ovviamente passivi, che ascoltavo in ambienti piccoli tantissimo tempo fa e tenuti conservati. La scusa è venuta appena ho cambiato il PC assemblandone uno da desktop di ottime performance. Già in possesso di un discreto DAC Topping DX1 collegato alle classiche Empire in legno amplificate, mi mancava un ampli per pilotare le piccole Linn...piccole ma diffusori "duri", 87 db di efficienza. Su consiglio di un amico acquisto Il Fosi V3.....Risultato?...Sorprendente....il problema non è tanto la capacità di pilotare carichi non facilissimi, quanto la qualità del diffusore che non perdona nulla...Il Fosi è incredibilmente di qualità , non voglio dire Audiophile in senso strettissimo (ma mi riservo di provarlo nell'impanto principale) , ma riproduce il suono in maniera trasparente, dinamico, senza incertezze , senza scomporsi e senza riproporre un suono confuso (tipico degli ampli di scarsa qualità)...ripeto, vi garantisco che le Linn Tukan sono diffusori di eccellente qualità....non perdonerebbero amplificazioni scarse....a questo prezzo il risultato e a dir poco sorprendente....altamente consigliato per impianti desktop con aspirazioni audiophile.....

He adquirido otros amplificadores FOSI clase D, y no me han decepcionado. En mi caso para cadena de audio que he ideado. Mediando como cerebro un WiiM Ultra. Alimentando de señal a otro amplificador fosi -M01 BT MONO SUB AMPLIFIER-para mover un Dayton Audio BST-300EX, 300 vatios RMS, agitador de graves táctil, impedancia de 4 ohmios, aparte la misma salida DE subwoofer del WiiM ultra alimenta señal para un subwoofer activo Yamaha de 250 watts.A su vez, en esta cadena va conectado un procesador de campos sonoros Yamaha, producto Vintage de excelentes prestaciones.Y para esto , este aparato requiere de 4 a 6 canales de audio, lo tengo a 4 canales con otro amplificador FOSI. EN ESTE PEDIDO : este Amplificador Fosi Audio V3, es Amplificador estéreo de audio para el hogar de 300 vatios x2 de potencia TPA3255 clase D Mini amplificador de altavoz 2 canales. En este caso lo pedí con su Power Adapter 48v/5A. Es un "monstruo" más grande y pesado que el mismo amplificador Me agrada su aspecto minimalista,con un solo botón para encender (hace "clic") y manejar el volumen Y si , lo esperado, se calienta, yo digo lo normal. Escribiré posteriores opiniones según se vayan portando estas pequeñas bestias amplificadoras

This is an excellent amplifier. I bought two of them to drive PSB desktop speakers and Kanto speakers in my dining room. They are no-frills and perfect for driving with WiiM streamers. They are compact and stack nicely with other small components like the WiiM Pro and a headphone DAC. The amplifier has plenty of distortion-free power and punch, and will drive speakers very loudly when needed. I really like Fosi audio electronics.