Fosi Audio BT30D Pro Mini Bluetooth Amplifier Hifi, 2.1 Channel Subwoofer Amp, with TPA3255 Chips 165W x2+350W and Bass Treble Controls, for Home Desktop Outdoor Bookshelf Speakers Subwoofers

I am quite picky and want a clean, high-quality sound with plenty of volume when it comes to hifi. This is a very compact little amp (40mm high, 120mm wide and 160mm deep). It has a good quality feel and a reasonable weight to it. I am using it to drive 2 Q Acoustic Speakers (2020i) that are rated 75 watts at 6 Ohms. I have the amp connected via banana plugs. I would say the amp matches these really well and drives the speakers fully. Not too much and not too little. At max volume there is a touch of distortion but not that much and honestly whilst I do like loud music, I would not really want my music that loud in the kitchen, I have another set up for that elsewhere. The treble and base adjustment may in some ways seem old fashioned but I really like them as you can give it a little more base or treble depending on your speakers, the music and of course your personal preference. You can get graphic equalisers to add to your phone, etc, but the on-amp adjustment just seems more accessible. I am not using the bass driver and honestly I do not think I will. So why did I buy this amp when Fosi do a version with no bass driver? Well, Amazon had a discount that made this version only £5 more than the non-bass driver version. Another reason though was that this comes with a 32 volt power supply and the non-bass driver version ships with the 24 volt supply but can be upgraded to the 48 volt supply. This means you will not get full performance if you only buy the one that ships with 24 volt supply. You can upgrade on the Fosi website but not on the Amazon website. You can buy the 48volt power supply separately on Amazon but this pushes the price up quite a bit. So, therefore I preferred this slightly higher spec model that ships with the 32 volt supply from Amazon and this is the max supply allowed for this unit, I think. That was my logic and it would be interesting to know what Fosi themselves think about this and whether my deductions were correct. I think Fosi should add the 48 volt power supply option to the non-bass driver unit on Amazon. I use this in my kitchen and for me a key selling point is the size. I have built it in to the bottom of one of my kitchen cupboards and of course its small size means it is very discrete. The Bluetooth works fine. Still good volume. It connects easily and makes a little bleep to signal connection. You can also connect directly if you have the right cables. The sound quality and volume are marginally higher and cleaner when connected directly, but the Bluetooth still sounds good. My arrangement slightly compromises the view to the Bluetooth antenna, which I have rotated so it is exposed somewhat. This does not seem to make much difference and the range is still fine. I am using it with iPads, iPhones and Samsung phones. All work fine. So I am very happy with this Fosi unit but I would recommend you look at their full range, perhaps on their website before you decide the best one for you. I went for Amazon because I knew it would come quickly and be an easy return if I did not like it. I am a bit shocked and pleasantly surprised that such a tiny and affordable little unit can be so good. Well done Fosi. (Ultimately I decided to get the non-bass model with the 48 volt power supply. This does give slightly greater volume with less distortion which is why I have updated this review.)

This little thing is the best bang for buck hifi amp I've bought. It runs a passive 12" Sub in a sealed enclosure and a pair old JPW monitors with no trouble at all and thumps haaaard if needed. Banana plugs are nice and the spacing is good for decent cables. Barely warm playing at decent volumes too. Solid build. I like the tunability for the sub especially, makes it's super easy to balance the sound for your room/application/carnival level bass requirements. Didn't expect to use the Bluetooth much initially either is it's mainly for a DJ system but it's so easy and sounds good.. All in all, great little amp for a 2.1 system.

Bought this to pair with a cheap turntable to play through the speakers of an old home entertainment centre that died a few years ago. The speakers were 2 ohm which limited my choices a bit, but I thought I'd take a punt on this little amp. So far, it's been great. Connecting it up was easy, standard phono plugs to the turntable and banana plugs to the speakers. The banana plugs weren't actually necessary as the port caps are screwable, so you can just attach the speaker cables and screw them down - but as I knew I was going to moving the whole system around until I was happy with it, I fitted the banana plugs to make it less of a hassle. The amp also has Bluetooth in, so you can play music from your phone too. I've got this set up as a 2.1 system, with a passive subwoofer and the amp drives that fine. The ONLY way this could be improved for me would be for them to add a balance control to even out my (by necessity) dodgy speaker placement. It all sounds great and for the price, I don't think you can go far wrong with this, so would recommend.

Just got this delivered, the sound is incredible for the price tag - wow! I have to add that I am not using the power supply that came with this, I bought a 48v power supply (from Fosi) as it will push the amplifier to a higher limit. Here is the bad part, the reason for a 4 star rather than 5. The box it came in, seem to been open - the seal was broken and a cable was missing. The missing cable was a part of the power supply (the one with the plug). As I ordered an extra power supply, I am fine for now. Yet I have a block that has no cable to plug into the wall socket. It always feel like a let down when you spend a chunk of your saved money to treat yourself and you receive a product that someone else have tempered with. Even tough I am happy with the quality of this little amplifier, I am thinking of returning it and go to a different brand.

Amazing what you get in such a tiny package, and at such a price. This little amp drives my Mission main speakers and a heavy dual 8" passive sub-bass! It takes a little bit of fiddling around to balance out the right settings for treble/bass and the two volumes, as these interact with each other. Fed with a decent signal (from an SU-1 DAC), it gives me clarity and separation and sound stage. Class D done right, with this TPA3255 amp. My only slight criticism is that I would have preferred the control that sets the bass cross-over point to the sub-bass, to also roll-off that bass to the main speakers so there's no clash with the sub. Very impressive piece of kit.

Outstanding amp good separation plenty bass and treble control and volume on my Wharfedale diamond 5 Speakers in the large kitchen Fills the room Recommended

I bought this based on the other reviews and am very pleased. This is a great, clear sounding little amp for the money. I am into audio, have been into hifi, studio and live sound for decades and this is perfect for a modest sized living room system or as an add-on to connect to a computer so you can set up some speakers and a sub. It's amazing how a little amp barely bigger than a tobacco tin can put out so much sound. Great stuff. If I had to nit-pick I would like additional controls for the sub, to modify the filter slope, it was a bit tricky to dial it in just right but not complaining, at this price point its great.

It works, it's powerful enough, it's good value for money in that sense. However there are some significant compromises - there is no balance control and you can't turn bluetooth off. I don't want to use bluetooth, I don't want anyone else connecting to it either so I've removed the antenna and am hoping that's enough. My speakers also had to be repositioned because I was relying on a balance control on my last amp to account for one being slightly further away.

Ho atteso prima di recensire proprio per completar un giudizio di performance più sicuro. Dunque posso testimoniare l’eccellenza dell’ampli della Fosi che fornisce un qualità molto buona. Un rapporto segnale rumore molto buono, una potenza ottima (spinge alla grande) e un buon controllo dei bassi ed alti. L’ascolto generalmente con sorgenti bluetooth e anche questo elemento ha una stabile connessione, pulita e di buona portata (distanza). Una nota sul surriscaldamento per uso esteso e a alta potenza: ho aggiunto una aletta di raffreddamento nella parte superiore che smaltisce molto ed evita potenziali blocchi. Nel complesso complimenti alla Fosi per lo standard qualitativo raggiunto !

Amazing Amp for a small stereo setup in our living area. It sounds great driving a pair of Q Acoustics 3090i bookshelf speakers and a small powered Focal sub. It's compact and unobtrusive. I thought I'd use the RCA jacks as a source with a ipod or old phone, but it's mostly driven via Bluetooth from an Amazon Echo. The Bluetooth connection is quick and stable with no drop-outs. One minor omission is a lack of a Toslink/optical input, but honestly that's a very minor thing, and Fosi do other units that have that if it's important to you. Would definitely recommend.

He comprado este amplificador Fosi BT 30 D, al ver las especificaciones. Voy a dar mi opinión sobre este modelo en concreto. Este aparato es un poco mas grande que otros modelos, y lo bueno es que trae una fuente de alimentación de 48 Voltios. viene bien empaquetado en una espuma de alta densidad que lo protege de cualquier golpe. Para conectarlo he usado cable de 2,5 mm con unas bananas marca VCELINK, los altavoces tienen una P. 100W, 8 Ohmios, y una (SPL)de 90, Marca Celestion. El subwoofer es un Yamaha activo. El amplificador me a sorprendido que para lo pequeño que es tiene mucha potencia, suena muy bien, y no distorsiona para nada, para regular el subwoofer lo tienes que hacer con el oído, hasta encontrar el equilibrio para no escuchar vibraciones. Se conecta al bluetooth, rapidísimo, lo he tenido por mas de 4 horas seguidas funcionando a una potencia alta y no distorsiona ni pierde potencia, y tampoco se calienta en exceso. He probado otro modelo Fosi BL20C, y el sonido es mas cálido, y como su otro hermano, muy potente. Espero que os sirva de algo mis reseñas, me parece un buen producto con un precio decente.

Perform well above my expectations! As my Klipsch PM2.1 internal amp blew due to fried capacitor, decided to try this amp and it packs more power than before.

I was not expecting much when I ordered the Fosi Audio BT30D Pro, after all what could you expect for CAD $140.00? I purchased this as a Hail Mary pass to try to raise my Paradigm Millenia CT, Shift Series 2.1 computer speaker setup from the dead after it had given up the ghost due to a failed amp board. Paradigm customer service was unacceptable -“We no longer produce that amp board. Our best advice is for you to purchase a more current model from our product line”. I may be old school, but I expect speakers costing $750 to last a lifetime. ( I still have a Pioneer SX- 767 seventies era receiver that works perfectly) After some research, I decided that a solution might be to bypass the Paradigm expression of crap and use a separate Class D amp to drive the satellite speakers and sub. The result: in short, I was blown away by the sound quality that this Fosi amp delivered. The resultant sound far exceeded the original Paradigm amp board. More articulate highs, better sub performance and a wider, deeper soundstage than the Paradigm amp. In all fairness, the power output of the Fosi amp is more than triple that of the original Paradigm amp, but the improvement in sound quality makes me question whether Paradigm’s product was under powered, given the obvious capabilities of the speakers and sub powered by this Fosi amp. I highly recommend this amp. At this price I do not think you can go wrong. Note: I use this with my computer speakers to listen to digital music files, mostly in FLAC format, via a wired connection to my music server. If you use it to play MP3 or compressed, Apple format files over a Bluetooth input, your mileage may vary, and as noted in some of the reviews, gamers may not be satisfied with the sub output. So, in conclusion, the Fosi BT30D pro exceeded my expectations and I recommend it as excellent value for the money. Paradigm equipment – less so.