Easy to connect and configure, plenty of power, and looks great. I used it to re-connect some in-wall speakers that were sitting unused for years and now I have music from my phone or Alexa over Bluetooth in half the house! Just wish it had a "sleep" feature instead of "auto-off" once the Bluetooth is disconnected (when you leave the house)

Bluetooth connects quickly and works fine. This amp will be used in my garage, and I have concern that there is no fan in the unit. We'll see how it does during the summer months. For now, I just have a couple of Klipsch SB2 bookshelf speakers. The sound is decent, base and treble are fine, but the volume is pretty "meh". At high volume there is little distortion, but my ears aren't what they used to be. The setup will be fine but I'll likely update the amp at some point. My speakers have a lot more capability than what this amp can provide. All in all, for the money, not a bad unit.

Really average, low volume, reviews are misleading.

I was looking for a non priority (Sonos) way to both power and Bluetooth connect to my four outdoor Bose 251’s so grabbed this device and it works perfectly. Can connect directly from my phone or streamer, pushes plenty of power, decent low end, great price and is in an all aluminum case.

This is a very good amplifier machine, it is very strong, the sound is really crystal clear, for those who think that the sound is low I would like to tell them that they should play it with an equalizer app, it will shake your house, this amplifier plays my 12" inch woofer very well

The Fosi Audio HT4S is a compact yet powerful Bluetooth amplifier. It combines Bluetooth connectivity, solid build quality, and impressive sound performance into a small, user-friendly package.Design and Build QualityThe first thing you'll notice about the Fosi Audio HT4S is its sleek and compact design. Housed in a sturdy metal casing, the amplifier feels durable and well-made, with a minimalist aesthetic that can easily blend into any home audio setup. Its small footprint makes it a perfect choice for users with limited space, whether on a desk, bookshelf, or entertainment center.The front panel features simple and intuitive controls, including a volume knob, input selector switch, and an LED indicator. There are also several input options, including RCA and Bluetooth, making it versatile for connecting multiple audio sources. The Bluetooth antenna is discreet yet effective, ensuring a stable connection.Features and ConnectivityThe Bluetooth 5.0 capability of the HT4S is one of its standout features. It offers seamless wireless connectivity, allowing you to stream music from smartphones, tablets, or laptops with ease. Pairing is quick and reliable, and the Bluetooth range is impressive, maintaining a stable connection even across larger rooms. The Bluetooth signal supports aptX, which ensures high-quality audio streaming with minimal latency.In addition to Bluetooth, the HT4S offers RCA inputs, allowing for wired connections to a wide variety of audio devices, CD players, or desktop computers. This makes it a versatile amplifier, suitable for both modern and traditional audio setups.Sound PerformanceFor such a compact amplifier, the sound quality of the Fosi Audio HT4S is remarkable. Powered by a high-performance amplifier, it delivers clean, powerful sound that punches above its weight in terms of size and price. The HT4S can drive a wide range of speakers, from small bookshelf models to larger floor-standing units, with ease.The sound signature is balanced and detailed, with a slight emphasis on the midrange and highs, making it ideal for vocal-heavy music or instrumental tracks. Bass is tight and controlled, though not overly boomy. If you're looking for more bass impact, pairing the HT4S with a subwoofer would be a good idea, as it lacks a dedicated bass boost feature.One of the most impressive aspects of the HT4S is its low noise floor. Even at higher volumes, it produces minimal distortion, providing clear and crisp audio output. Whether you're using it for casual music listening or as part of a more serious home audio system, the sound quality is more than satisfactory.Ease of UseThe HT4S is designed with user convenience in mind. Setting up the amplifier is straightforward, and the controls are intuitive. The volume knob has a smooth, precise feel, and switching between inputs is as simple as flipping a switch. The LED indicator makes it easy to see which input mode you're in.Durability and Heat ManagementThe metal housing not only looks sleek but also helps with heat dissipation. The HT4S runs cool, even during extended listening sessions at higher volumes. This is an important feature, especially for those planning to use the amplifier for long hours. Its solid build also suggests that it will stand the test of time with proper care.Price and ValueAt its price point, the Fosi Audio HT4S offers excellent value for money. It’s hard to find such a compact amplifier that delivers on sound quality, build, and Bluetooth performance at this price range. It’s an ideal choice for those looking for an affordable yet high-performing amp to power bookshelf speakers or create a wireless streaming setup.Final VerdictThe Fosi Audio HT4S Bluetooth Amplifier is a great option for those seeking a compact, affordable, and high-quality amplifier. Its combination of Bluetooth 5.0 connectivity, versatile inputs, and impressive sound quality makes it suitable for a wide range of applications, from casual listening to powering more serious home audio systems.Pros:Compact, durable, and stylish designBluetooth 5.0 with aptX for high-quality wireless streamingClean and powerful sound with low distortionMultiple input options (Bluetooth and RCA)Easy to set up and useCons:Bass output might feel a bit light for bass-heavy genresLacks a dedicated subwoofer outputOverall, the Fosi Audio HT4S offers excellent performance for its price, making it a fantastic choice for audiophiles on a budget or anyone looking to enhance their home audio setup.

TLDR: If you're looking for a beautifully built, excellent sounding bluetooth amp this is the one. It excels in audio clarity with little to no distortion at high realistic listening volumes, offers multiple audio input modes that you can select between with a convenient remote, and has the most output channels of any bluetooth amp for this price point. An absolute MUST BUY for any one in the market for a small nice amp.Right out of the gate, this new Fosi Audio bluetooth amp is absolutely amazing. The build quality and design are top notch given the price of this amp. Really hard to beat especially when compared to other similarly priced amps on Amazon.Rated at max power of 50watts per channel at 4ohms, this thing has enough power to realistically handle any speakers you throw at it given its use case. I tested these on my Wharfedale Evo 4.2 bookshelf speakers (these are no slouch!) and WOW what a difference in audio quality over my $1k Denon AVR for music. The DAC on this bluetooth amp is shockingly very clear and defined, definitely ideal for music. Added with the tone controls on the front of the amp, this amp is more versatile than ever. I've got 2 other models of Fosi Audio amps, and this is by-far superior to the other older models that I've got. It's got much better clarity and doesn't distort at higher volumes in comparison to the TB10D that I have.One of my favorite improvements over the previous model bluetooth amps from Fosi is that this new HT4S model has the ability to select your audio input mode. I can now swap between bluetooth on my phone for music and optical/aux in from the TV/Apple TV. On my older bluetooth amp from Fosi it was an on/off switch control and that was it. Both bluetooth and aux were active at the same time. So if I was watching something via the TV somebody else could bluetooth freely and play music over my TV audio which was very frustrating. With this new HT4S model that issue is now gone and the beautiful LED light bar on the front panel displays which audio mode you're currently in by changing colors.

Fácil de conectar y de utilizar pero ofrece volumen bajo. No tiene tanta potencia

This product is a bit of a dud. They try to label it as for home theater, 4.1 audio but it only accepts stereo audio. So if you plug it to your tv, play Netflix etc, your “surrounds” will basically be the exact same as the fronts. It’s really 2.0 at that point, if your tv only has 2.0 pcm, the subwoofers are incredibly weak. Just double set of front speakers and weak bass signal.That’s why this product is a dud, it only suits very niche scenarios. It outputs stereo but across 4/5 speakers? Can’t imagine it for a restaurant unless you want half your speakers playing different things than the other. Definitely not home audio which is what I was excited for. Can’t replace a receiver. Maybe just for that race game thing they show.

Uso questo amplificatore insieme ad una tv per controllare 3 casse e una sounbar collegata al preamp. Il suono é fantastico e privo di rumori o qualsiasi altro difetto.Apprezzo il supporto al codec AAC, così che tramite bluetooth si possa avere una qualità audio maggiore.Il look del dispositivo é molto moderno ed é molto compatto. Inoltre, sulla parte davanti é dotato di una striscia led che serve ad indicare la sorgente connessa. Quest'ultima si può disattivare col telecomando fornito.In conclusione, consiglio questo prodotto a chi vuole fare un modesto impianto home theater. Ottimo rapporto qualità/prezzo.

I bought this to power a pair of Klipsch RP-600M II bookshelf speakers on my desk and it does that no problem at all, the volume at 1/4 is louder than i would ever listen to my speakers at and it gives crystal clear sound with zero distortion. I love how it looks with the copper colored volume knob, it matches the copper cones of my speakers great. This amp is also very cool that it can power a passive subwoofer, if the speakers you're powering have a high sensitivity the subwoofer won't play very loud unless you turn the volume up a lot but its nice that its an option. Plenty of connectivity too, it has bluetooth, 3.5mm input and digital input. The amp is bigger than other Fosi amps i've used in the past at about 6" x 6" and 2" tall but thats not a problem for me. The auto power off feature is great too. All in all excellent amp from Fosi Audio.

Passende Grösse Sehr gute Qualität Kann ich gut empfehlen

The build quality is quite satisfying with a sleek all metal enclosure and considerable heft. The adjustable 2-band EQ works, and can over power satellite speakers fairly easily, though for larger speakers it won’t push that much bass through them, but it advertises it as such, and the sub pre-out is a true pre-out with little-to-no noise. Total volume is surprisingly loud through 5 Klipsch Quintet |||’s. Bluetooth is stable and far reaching (near other side of house through walls far). Recommended, especially for the price point and compactness.