5.0 out of 5 stars Pretty good for a budget amp

2026-03-01    -Christopher Gruber

Not the most powerful amp but it worked for my application. I have two outdoor speakers. After install I realized it didn’t quite have the output I wanted so I bridged the rear outputs to the front outputs and now it has plenty more than needed. I am using it outdoors on a covered patio and it’s held up 6 months so far.

5.0 out of 5 stars Pretty good for a budget amp

2026-02-12    -Christopher Gruber

Not the most powerful amp but it worked for my application. I have two outdoor speakers. After install I realized it didn’t quite have the output I wanted so I bridged the rear outputs to the front outputs and now it has plenty more than needed. I am using it outdoors on a covered patio and it’s held up 6 months so far.

Excelente opción cuadrafónica...

2026-02-21    -Daniel

Es una excelente opción para un sistema de audio pequeño. Elegante y cero procesamiento de audio.Recomiendo usar unas buenas bocinas, ya lo intenté con gama de entrada y es una decepción. Subí de categoría y se escucha excelente.No es para reventar nada, pero tiene muy buena calidad. Yo lo instalé con 2 Polk para estante, 2 Yamaha de piso y un subwoofer de 12'. Es suficiente para el sistema de audio en mi recámara.Tengo conectado una tornamesa a la entrada auxiliar, mi pantalla por la entrada óptica y para música uso mi teléfono por BT.El control remoto es muy práctico, ya no uso las perillas del amplificador.Es compacto y la fuente de alimentación está integrada, es casi el doble de sus hermanitos el BT20A PRO y BT30D PRO. Tengo ambos para otras aplicaciones, suenan un poco más fuerte, pero sin lugar a dudas, si quieres un sistema cuadrafónico es la mejor opción.Comentario adicional, no se calienta mucho, incluso si lo tienes funcionando por horas.

5.0 out of 5 stars ABSOLUTELY beautiful both visually and audibly. Will bring your speakers to life!

2026-01-19    -Kenny Vannavong

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.

Excelente opción cuadrafónica...

2026-02-15    -Daniel

Es una excelente opción para un sistema de audio pequeño. Elegante y cero procesamiento de audio.Recomiendo usar unas buenas bocinas, ya lo intenté con gama de entrada y es una decepción. Subí de categoría y se escucha excelente.No es para reventar nada, pero tiene muy buena calidad. Yo lo instalé con 2 Polk para estante, 2 Yamaha de piso y un subwoofer de 12'. Es suficiente para el sistema de audio en mi recámara.Tengo conectado una tornamesa a la entrada auxiliar, mi pantalla por la entrada óptica y para música uso mi teléfono por BT.El control remoto es muy práctico, ya no uso las perillas del amplificador.Es compacto y la fuente de alimentación está integrada, es casi el doble de sus hermanitos el BT20A PRO y BT30D PRO. Tengo ambos para otras aplicaciones, suenan un poco más fuerte, pero sin lugar a dudas, si quieres un sistema cuadrafónico es la mejor opción.Comentario adicional, no se calienta mucho, incluso si lo tienes funcionando por horas.

Ottimo amplificatore per casse!

2025-12-24    -jot343234

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.

a great option for those seeking a compact, affordable, and high-quality amplifier

2026-01-21    -TheBoxBit

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.

5.0 out of 5 stars Cheap and compact way for good TV audio

2026-01-21    -reviews

Works wonderfully for my TV setup. I have it hooked up with a toslink cable and it was quick and easy to get running. I wanted something simple and compact. No large AV receiver. I'm just running 2 bookshelf speakers and a center unit all purchased second hand. This amp is good to power the three speakers. Best thing about something like this over a sound bar is that you can easily swap out speakers or add speakers to scale up the quality. Also the bluetooth quality is good. I was worried about that in consideration of what I had experienced in one of their older cheaper speaker amps but in this one the sound quality is solid.

5.0 out of 5 stars Game-Changer for My Setup — Power, Clarity, and Zero Hassle!

2026-02-08    -Joshua

Just got this Bluetooth amplifier/receiver and I am beyond impressed. Setup was insanely easy — paired to my TV and phone within seconds — and the sound quality is on a totally different level. The clarity, bass response, and overall power this little unit puts out shocked me. It instantly upgraded my detached garage man cave and made movies and music feel immersive and clean.Bluetooth connection is rock solid with no drops, the controls are simple, and the build quality feels premium. I also love that it gives me the flexibility to run speakers without dealing with a huge bulky receiver.If you’re looking for a compact amp that delivers big performance, this is the one. Absolutely worth every penny — can’t believe I waited this long to get one!

Ottimo amplificatore per casse!

2026-01-08    -jot343234

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.