Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control

I needed to gift a stereo system and I really didn’t need to think about which amp I’d pick up. It was almost a given. The Fosi, suffice to say, didn’t disappoint even when paired with speakers I originally didn’t mean to buy (I was looking for the Klipsch RP400M but couldn’t find them anywhere). And once I set the system up, the BT20A simply rose to the occasion, bad room dimensions and all. My only niggle, the volume increase is not linear. Turning up the knob doesn’t do much until about 25% up and then at 60% begins to amplify the sound exponentially. And it also does not have the resistive/expensive feel of the volume knob on the BT10A that I use as a personal desktop system

Awesome product with superb sound quality. This can beat the amplifiers costs more than 10 times of its cost. I was not so confident to buy a class D amp as i always felt that class D amps lacks musicality. But this one made me a fan a Fosi audio. I am ordering P3 preamp now and wish to to try the ZA3 model too. Kudos to fosi audio for bringing quality products for affordable price. I am following fosi audio for new releases and their models will always have a place in my youtube channel techavmallu as reviews and ownership experience.

It works very well I'm impressed.

Gud buy

Delivers Great sound.

I paired it with Jamo C91 bookshelf speakers and I am just amazed how well it works. Truly recommend it!

Excellent product

I recieved my package on the product box only and it is open.

This is a honest review of FOSI BT20A PRO. After trying a few Inexpensive yet good class D amps, I decided to go for the fosi bt20a pro, as its based on Tpa3255 and has the bluetooth & rca connection options (till 6.months back there were too few BT amps from fosi or aiyima) Here is my review Build : Pretty solid, everything is upto the mark, the aluminium used high grade anodised one, no creaks and squeaks anywhere when you hold the amp. All the three knobs (bass treble and Volume) are sturdy but somehow the one I got had a kinna wobbly volume knob, dunno if it's just me or this is the way it is. The back connectors and sockets are placed pretty close to each other but with some small maneuvering everything can be pushed, tied and fixed. Accessories There comes a bluetooth antenna the standard one & decent enough, which you have to add yourself. POWER SUPPLY : the amp is rated to work from 24v to 48v power supply but is shipped with a Fosi branded 32V 5A one.. It does what is expected of it and the output is sufficient..(at lest fir my use case scenario is more than enough) The wire provided with the power supply adapter is of adequate length, the block and wires all look decent and feel study enough . Checked its voltage and it does produce what is claimed 32.4V to 32.5V. Functionality.. Bluetooth connects in a jiffy and the coverage is good. Kinna tricky sometimes to get the connection changed but by and large it's easy to switch from BT to RCA There is also a socket of 3.5mm pre out at the back which can be used to supply signals to an active subwoofer which is awesome in my view... But I don't think I ll ever need that because the amp giving enough thump already with the pair or my Sony passive speakers. This same socket can be used to connect this amplifier as a preamp to another amplifier if you want.. ONE VERY IMPORTANT THING : The amp comes with replaceable op amp chips, (which require the user to remove the screws and slide out the motherboard and then chnage the op amp chips) the more enthusiastic audiophiles who like to experiment with different sound signatures can change them according to their preference.. FOSI has suggested a number of op amp chips that one can try after purchasing them from market or from online.. (there a few available at Amazon India as well) In my personal view it is sounding pretty good as it is so for majority of users there is absolutely no need to experiment with the op amp chips. Audio quality Please note I use my SONY BOOKSHELF SPEAKERS with this.. The one which came with my Az2d music system they have a kind of plasticky cone hence the bass is pretty tight and I love that. Via Bluetooth it sounded pretty decent (please note I use Spotify with highest streaming audio quality on an iPhone) Through RCA I stream via my Google chromecast audio and the sound is fantastic. Over all its pretty loud, the tone knobs do a good job and the best part is there is a neutral point for both bass and Treble exactly in the center so you get a good reference point.. The low freq response is awesome which is genuinely deep and tight, the high freq are pretty good too but may be a bit more wanting like 10% lesser than the bass response... But that's just me... Over all it has played everything nicely that I have thrown at it... Mids are pretty good ( as you are to manage the mids via your preamp etc, you can further enhance them as well) Be it the jazz, or Bollywood music, or ghazals by Mehdi Hassan and Live Indian Classical renditions in both vocal and instrumental, it played everything nicely (of course you have to adjust the knobs according to the type of music as well as the source quality) Edit : after using for more than a month I can say the sound is pretty neutral and with a wide stage, the high frequencies need a tad extra kick for my liking so I am trying to arrange a preamp now to boost the quality further.. But one thing is for sure, via Google chromecast audio (which technically means that there is a proper DAC before the RCA input (as the GCA has a dedicated DAC in it) this thing just sounds so great.. Please note : type of drivers (speakers) plays another huge role so please use atleast half decent ones with these... All in all I am pretty happy, would have loved a fully functional remote and a knob to manage the mids too (I know that's tricky) Would have loved to have couple of more connectivity options like optical etc but I know I will never use them so doesn't matter, but having them would have been great even if just for academic purposes... In the end I can safely say that its a pretty good small package Would highly recommend it as tpa3255 chip perfoms extremely well and with its implementation on the fosi board it produces very loud audio without much distortion... There is no hissing or clicking when the amp is idle and it doesn't get hot (that much) as well.. Thanks

Ürünü fiyatına göre değerlendirmenin daha doğru olacağı kanısındayım. Dali Oberon 3 ile kullanıyorum. Boyutuna göre, gerek detay, gerek bas ve tiz performansı olarak memnunum. Hızlı ve sorunsuz teslimat için Amazon'a teşekkürler.

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It seems that I got a particularly broken unit, in which the Bluetooth module caused an annoying crackling and buzzing sounds. The manufacturer's support team was simply professional and I was positively surprised by the level of understanding and support I received.

Parto dal presupposto che sto esprimendo il mio parere in relazione ad un prodotto che ha un costo che definirei irrisorio in un contesto hi-fi. Non mi dilungo a descrivere le caratteristiche tecniche che chiunque può leggere ma vado direttamente al dunque come faccio di solito. Come suona? - Bene. Provato il collegamento Bluetooth sia con il mio Samsung s21 che con il mio iPad il suono in classe “d” si mantiene pieno fresco ed equilibrato. Lo stesso dicasi per il mio MacBook Pro 16 pollici e per il computer con sistema Windows. Sinceramente ho notato un suono più trasparente durante il collegamento con l’iPad di ultima generazione forse dovuta alla tipologia del dispositivo. La gamma media inizialmente deludente a volume basso esprime una sicurezza non comune appena si raggiungono i 3/4 del potenziometro. non vi aspettate una potenza di 300 watt bensì un volume assolutamente adeguato ad una stanza ed a un ascolto piacevole sia con casse da 8 che da 4 ohm. Merito probabilmente della tipologia di controllo del volume. La compattezza è il suo forte. Al tatto piacevole. I collegamenti mantengono quanto pubblicizzato. Semplicità ed immediatezza. Ho provato il collegamento in serie ad altro amplificatore per collegare 4 casse. Eccellente. Totale assenza di fruscio In sintesi un oggetto minimalista privo di telecomando, dac o ingresso cuffie ma efficiente, compatto e con un rapporto qualità /prezzo assolutamente al di sopra della media ed io ne ho provato veramente tanti. Non credo che con un budget così ridotto si posso trovare di meglio. Come già detto parliamo di un dispositivo con un costo sotto ai 100 euro non siamo al top dell’hifi. Il valore aggiunto, quello che però mi ha realmente sorpreso è stata la disponibilità del personale addetto della Fosi. Sempre pronto a rispondere alle domande e soddisfare esigenze. Naturalmente da consigliare. Ho intenzione di provare altre apparecchiature della stessa casa produttrice e non esiterò a fornire una pronta risposta. AGGIORNAMENTO Per mia curiosità musicale e mio desiderio di ricerca di verifica di quanto asserito dai venditori ho acquistato un alimentatore Fosi Audio Adattatore CC alimentatore GaN 48V 5A ed un paio di operazionali Sparkos SS3602 , quest'ultimi direttamente dal sito Fosi non essendo disponibili su Amazon. Sono rimasto sorpreso. Il primo impatto con l'alimentatore che fornisce una dinamica maggiore specialmente a fine corsa del volume, evidenzia solidità e garantisce una maggiore protezione. L'altra sorpresa l'ho avuto dopo avere montato i chip operazionali Sparkos. E' evidente che in tale maniera il costo non è più minimo bensì andiamo a quasi il triplo di quello del solo amplificatore però ne vale la pena. Nonostante le ridotte dimensioni il BT20A PRO regge il confronto con amplificatori più blasonati e sicuramente di dimensioni maggiori. Il montaggio dei chip è stato molto semplice. Basta seguire le istruzioni a video. Una difficoltà iniziale nel togliere i chip in dotazione fortemente ancorati ma agendo con decisione il tutto diventa molto semplice. Adesso devo solo aspettare l'uscita dello Z3 ... vediamo cosa viene fuori.