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!

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.

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.

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 have a pair of wharfedale diamond 9.1 that I was using in a 2nd system with a Linn LK140. I thought it sounded great. Then I read a review with technical measurements on audiosciencereview.com and decided to try out the 48v power supply version, which was available for only £115. WOW This is better sounding than the Linn amp, and, more importantly for me, can go louder without clipping. I can basically get the sound pressure level in my small room up to 95dB and it still doesn't clip. I tried an aiyima a08 pro in there and while it sounded good, it clipped much earlier than the lk140, so i just moved it to my computer desktop. I sold the Linn LK140 on eBay for double the price of this. Basically if you are looking for an amp to listen to beyond hearing damage levels in smaller rooms or at loud levels in larger rooms, this is better than a linn LK140, which is still a well regarded amp. Make of that what you will. It prolly sounds on par with my Linn 2250 in my main system, except has a little less power. I recommend you buy this. I would be willing to pay many t8mes the price of this amp for its performance, at such a low price it's the hi fi bargain of all time, alongside a smsl c100 dac for £70( also on amazon), which sounds better than my Linn Majik CD player btw

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.

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

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Ho avuto un problema di malfunzionamento dei miei amplificatori autocostruiti qualche decina di anni or sono su progetti della rivista Elektor. Mi hanno dato buona musica per molto tempo in un impianto a tre vie multiamplificato con crossover attivo. Ora è venuta meno la voglia di mettergli le mani e soprattutto la convenienza considerato il costo dei validi prodotti che in classe D ora offre il mercato. La scelta è caduta su questo modello Fosi non tanto per la potenza (sui cui valori sono già state esaurite le considerazioni - e quella che mi è necessaria è senza dubbio ampiamente soddisfatta dai valori minimi ricavabili) ma per la accuratezza della riproduzione e per la silenziosità assoluta degli amplificatori sia senza segnale in ingresso sia all'atto della accensione e dello spegnimento. Nessun ronzio nessun rumore. I potenziometri dei volumi sono stati impostati intorno alla metà corsa ed il volume generale viene regolato dal livello della sorgente (cd). Poichè il loro livello di volume deve restare invariato li ho collegati ad una ciabatta con interruttori che mi consente di spegnerli per primi e accenderli per ultimi rispetto al resto dell'impianto. Devo dire che rispetto alle mie realizzazioni oltre ad avere guadagnato notevolmente in spazio (!!!!) ho avuto benefici notevoli anche nel suono mettendo in luce i limiti di progettazioni sia pure valide ma di altri tempi. I morsetti di connessione sono comodi per banane da 4mm. L'alimentatore l'ho scelto della taglia maggiore non per sfruttare le possibilità di potenza ma per dare un ampio respiro di funzionamento. Durante l'utilizzo di alcune ore gli alimentatori sono a temperatura ambiente e gli involucri degli amplificatori sono appena tiepidi. Peraltro nel mio caso lavorano ognuno su una banda di frequenza del segnale audio e quindi non deve un ampli gestire tutto il segnale. Ritengo che ne sarebbe comunque capace. Inoltre ho scelto questo modello perchè l'impedenza degli altoparlanti collegati gestibile va da 2 a 8ohm. Lo ritengo un amplificatore dinamico e raffinato che sarà il compagno di tanta buona musica. Sono soddisfatto del prodotto.