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The Fosi Audio BT30D is a compact 2.1 channel Class D amplifier featuring Bluetooth 5.0 for wireless streaming, delivering up to 200 watts of total power (50W x2 + 100W subwoofer). It offers versatile connectivity with Bluetooth and RCA inputs, plus adjustable bass, treble, and subwoofer controls to customize your listening experience. Ideal for powering passive speakers and subwoofers, this mini Hi-Fi amp combines high-performance Texas Instruments chips with a sleek design, perfect for modern home audio setups.

















| ASIN | B07K7NJ4QN |
| Best Sellers Rank | 6,999 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 12 in Hi-Fi Amplifiers |
| Box Contents | 24V/4.5A power supply |
| Brand Name | Fosi Audio |
| Country of Origin | China |
| Customer Reviews | 4.3 out of 5 stars 2,866 Reviews |
| Item Weight | 1.1 Kilograms |
| Manufacturer | Fosi Audio |
| Manufacturer Part Number | BT30D |
| Model Number | BT30D |
| Number of Items | 1 |
| Product Warranty | 24 months |
| Unit Count | 1.0 count |
M**Y
GREAT SOUND, GREAT BUILD, AND QUALITY.
Perfect little amp. Stylist and functional. Ideal for my needs. I have it hooked up to a pair of old Pioneer (100w) speakers, plus a Polk subwoofer. The units MAX Power Output: 50W x 2+100W. The Bluetooth is fine, and the connection was quick. It does from time to time drop out, even when my mp3 player is only 2-3 metres away, but in the main its stable. I have notice though, that using my other MP3 player, which is an iPod touch, then I get no drop out. Its very loud when I want it to be, I control volume via the mp3 player. Good sound for me, but I’m not audio master. It packs a punch for such a small amp, it handles my speakers and sub well. I would definitely recommend this unit to my family, friends and colleagues.
S**C
Excellent little amp!
TLDR: I love it! In my home office I have 2x Gale Audio monitor speakers, and I was previously powering them through an old mini hi-fi, using an amazon echo to play music. I wanted something smaller, and with better EQ controls (yes, the mini hi-fi had none) I also wanted the flexibility to add a sub at some point, so this Fosi 2.1 looked perfect. Initial setup with the 2x bookshelf speakers - the sound is already nicer than the old hi-fi - and such a small neat package too. I had to run it around 3/4 volume, as I want the alexa to control the volume, but that's fine. Other reviews have mentioned hiss, but I dont have any. Then I remembered I had an old sub in the attic, so I went and got it, couldnt get it working in active mode, so switched to passive, and I have to say it further improved the sound again. I'm really pleased with this little amp, it is very neat and tidy, and does exactly what I wanted it to do. Thoroughly recommend if your use case is similar
S**Y
Remarkable Sounding little unit but flawed security on bluetooth connection.
Remarkable sound for the cost (after a few hour use to burn in) I hooked this little thing up to my Monitor Audio Silver 200' floorstanders and using a good source like my Cambridge CXU into the phono's and playing CD's this unit provides a surprisingly wide spacious sound stage and good solid bass rhythms, the bass goes deep as well and sounded like it actually had more low end clout than my £1500 hifi amp, the sound gives good bite and texture to instruments making strings, violins and cello's etc sound very real, I was shocked how good it sounded tbh. Of course all is not perfect (lets not forget its and 85 quid mini amp) and where this little digital amp falls down is on refinement to the music, it's a little course and hard in the treble quality and lacks the fluid creamy sound of a good hifi amp so it's certainly not a substitute for a good hifi amp but as a bedroom setup or for the computer it's excellent. I then connected it to my THX soundworks computer speakers and 8 inch passive sub and again it proves excellent with more power and punch than I will ever need, even with the standard power brick it has lots of usable volume. Bluetooth sounds just OK as you'd expect and the signal is stable BUT the major flaw in this unit is ANYONE ELSE CAN CONNECT AND PLAY MUSIC OVER IT via Bluetooth WITHOUT your permission as it does not have a pair button or ask for a code on your phone, this is really stupid and why I have only given 4 stars.
M**I
Great little amp!
Great little amp. I paired it with Klipsch R 41m's and it can shake the room when pushed no distortions that I can hear, pretty amazing. It does have some static noise coming out if you crank up the dial with highs but its only audible when you dont play anything; when music is on you cant hear it. I cant say anything about the sub output since I dont have a sub. The bluetooth connection works great. Great value for money no regrets whatsoever.
G**E
Very nice sound!
Pleasantly surprised by how nice this little amp sounds! Bought it to use on my PC for music etc.. Hooked it to a pair of Denon bookshelf speakers and a Pioneer passive sub and the sound is great. A few little tweaks to the sound adjuster knobs on the front and its sounds lovely. One thing to note that using a 3.5mm to RCA from my PC's motherboard, the volume is crazy loud! my PC's volume bar is on 40% and its more than loud enough. The volume knob on the amp isn't even quarter turn.. So just be warned if using with a PC. Otherwise.. a top piece of kit :)
A**Y
Sounds OK - but there is a huge amount of hiss when no audio is ouput
I run a very low noise floor audio interface into this amplifier with QED cables and clean power. The hiss when sitting in front of near field monitors makes it almost unusable and it will be getting removed from my system. I wanted the analogue sub output and for this it is very useful along with its size and bluetooth connections. Ironically it is the amplification part that lets it down. That said it is probably best of a pretty average bunch if you need such a small size.
A**R
Ideal for speakers with passive subwoofer.
Using this to drive JBL ceiling speakers. 4 full range and one subwoofer. Amplifier has plenty of power for domestic usage. Drives the JBLs really well, level control and subwoofer frequency built into amp makes it perfect for a simple solution. Bluetooth has been reliable, happily connects to LG TV. Very clear sound. Delighted with the purchase.
S**S
For a class D this is awesome
Got this yesterday , paired it up with some new 55w Moukey speakers . I wasn't expecting a lot but so glad I got them as they have passed any expectations from such a tiny unit. Had them going for a few hours yesterday bedding them in and the sound just gets better and better . I haven't added a sub yet and to be honest I doubt I will . Go for it , you will not be disappointed!!
R**L
Great for the price
The unit itself feels to be good quality. All of the knobs are nice to use etc. Bluetooth seems to work well in close proximity but haven't tried through walls or anything. Sound quality is okay, and drives my wharfdale bookshelf speakers reasonably well. Good: - Price - Build quality/feel - Does what it says on the tin Not so good: - Sound quality (as you might expect at this price) Good value little package!
J**O
Perfect for basic usage, fairly priced
I bought this unit for improving my movie/TV show watching experience - just basic video from Netflix and other such platforms. Nothing to complain about for this use case. The unit is small and quiet, has very good volume output (I have it at half volume and then control the sound via my TV with a 3.5mm to RCA adapter, more than enough volume for a living room), configurable bass/treble, and good connections - easy to start with 2 basic speakers and then add a subwoofer later on. This setup is already a much bigger improvement when compared with basic tv speakers. The added Bluetooth connection also makes it easy to listen to some music. It most likely cannot compare with more expensive setups - but for a basic ocasional listener, it's more than sufficient and I'm very satisfied with it.
R**J
Excellent Mini Sub to beat soundbars
Excellent mini amp to go with decent passive bookshelf speakers and subwoofer. Will beat a soundbar setup any day. Very smooth & clean sound. Bluetooth connectivity is seamless and pairs quickly.
T**S
Très bon rapport qualité-prix
J'ai choisi ce produit afin de pouvoir utilisé mes haut-parleur analogique pour ma platine vinyle et en Bluetooth connecté à un vidéoprojecteur. Tout fonctionne très bien, je n'ai aucune perte de son, je dois simplement soulever deux souci : - Il n'y a pas de bouton pour autoriser des connexions aux nouveaux appareils. Si vous n'eteigniez pas l'ampli, n'importe qui peut se connecter dessus - J'aurais du prendre la version avec la télécommande afin de régler le volume. Pour mon utilisation, cela m'oblige à me lever (très) régulièrement pour régler les basses/aigus et le volume lorsque je regarde un film, afin de ne ma géner le voisinage. Si vous n'avez pas les deux contraintes citées ci-dessus, c'est un super produit et très compact.
C**N
Grandísima relación calidad/precio
Estaba buscando un miniamplificador para usarlo en el salón de casa con unos altavoces que también he pedido en Amazon (aún no me ha llegado). Por lo pronto los estoy probando con unos antiguos altavoces Jensen y el resultado es espectacular. Tiene unos agudos muy claros y una buena separación entre medios y bajos. Me falta probar un subwoofer (este dispositivo tiene la peculiaridad de soportar subwoofer activos y pasivos). Muy contento con la compra. Lo recomiendo.
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