Fosi Audio HT4S Bluetooth Amplifier 4.1/5.0 Ch Stereo for Outdoor Speakers, 4-Channel Power Amplifier for Bass Shaker Sim Racing Cockpit, Support AUX/Optical Input with Remote Control

The Fosi Audio HT4S is a fantastic little amplifier with rich, detailed sound and strong Bluetooth connectivity. It delivers clean highs, solid bass, and more power than you’d expect for its size. The build quality is premium, setup is easy, and it runs cool even after hours of use — provided you pair it with good speakers.

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

Believe that an amplifier can turn old Sony home theatre speakers alive. The original Sony system stopped working due to motherboard issue and it being some 15-16 yrs old could not be repaired. After several research and review finally bought this amplifier. Gambling 10k on this and went ahead. Have been using daily for 12-15hrs (TV usage) and there has been no issue. Listening to music has been pretty good. One issue I faced was buzzing sound after around 15 days when connected via bluetooth and Airtel set top box however with mobile that sound was not coming. So it might be the issue with the set top box itself. Currently TV and amplifier are connected with 3mm cable and has no lag in picture and speaker.

Good good product good audio

1. Sound quality with bookshelf speakers (20w-30w) - audio quality is great, output not so much. I'm using a fire stick with the volume cranked to full on Bluetooth. 2. Toslink/ spdif - connected the TV (with firestick) to it, no volume control at all. - horrible. Pls check if you can change levels of toslink output at your TV end before thinking of volume control. 3. Sub output - bad.passive subs Cannot be heard over my mid range bookshelfs. Returned the product. Should have been more cautious with checking out.

Good sound quality but not louder Sound quality is expressive Need more louder in this price range

Superb quality sound. Best compact size .. good performances for that size… value for money

Had to return the product as performance was not as per expectation. Bluetooth was not supporting 5.1 audio. Optical was not supporting all digital audio format.

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 Quality The 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 Connectivity The 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 Performance For 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 Use The 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 Management The 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 Value At 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 Verdict The 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 design Bluetooth 5.0 with aptX for high-quality wireless streaming Clean and powerful sound with low distortion Multiple input options (Bluetooth and RCA) Easy to set up and use Cons: Bass output might feel a bit light for bass-heavy genres Lacks a dedicated subwoofer output Overall, 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.

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.

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.

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!

I love the fosi audio i always use and buyfor work