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Price: $109.99 - $99.99
(as of Jan 20, 2026 13:11:27 UTC – Details)
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Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Bluetooth amp stereo Merchant Video
…, 4.5,
Reviewer: Kevin Ely
Rating: 5.0 out of 5 stars
Title: Shockingly Good Little Amp — Perfect Drop-In Replacement for an Outdoor BBQ-Island Setup
Review: I bought this little gray superhero after my previous “mystery box” amplifier (buried deep inside my outdoor BBQ island like some kind of archaeological artifact) decided to cut in and out every time I turned the music up past “mellow backyard vibes.” Nothing kills a good afternoon faster than your speakers crackling like they’re coughing up dust.📦 First ImpressionsThis thing is tiny. Like “did they ship me the right item?” tiny.But don’t let the size fool you — it punches like a heavyweight. Bluetooth range? Strong. Power? More than enough to drive the 6.5” Aquatic AV outdoor speakers I already had wired in.🔧 Installation (AKA: How I Crawled Into My BBQ Island and Survived)My previous setup looked like NASA mission control. Wires, harnesses, proprietary connectors, and something pretending to be a subwoofer box.The Fosi made the whole thing simple:• Speaker wire → into left & right terminals• Power adapter → plug• Bluetooth → connect• Music → immediate happinessNo proprietary weirdness. No random 4-pin blue plug. No tears.🎵 Sound QualityCompared to my old Aquatic AV amp, which acted like it had seasonal allergies, the BT20A Pro is clean, strong, and shockingly loud for its size.• Bass is smooth (especially with your speakers’ built-in low-end)• Highs are crisp• Mids are clean• And the bass/treble knobs actually do something instead of just pretendingHonestly, for a backyard setup that sits in a protected cabinet, this little thing is the perfect “sweet spot.”📡 BluetoothFast pairing. Zero drama.I walked almost to the front yard before it even hinted at disconnecting — which, for anyone with an outdoor entertainment setup, is basically sorcery.🔥 The VerdictIf you want:✔ A simple, clean replacement for a dead factory amp✔ Power that actually moves your outdoor speakers✔ Bluetooth that doesn’t quit✔ A device that you can install without needing an engineering degree✔ Something small enough to hide anywhere…then this is exactly the amp you want.😂 Bonus Humor SectionMy old amp weighed 10 pounds and sounded like it had asthma.This Fosi weighs nothing, and sounds like it drinks pre-workout.⸻⭐ Bottom Line:For the price, size, and performance, this little amp is the MVP of my backyard. If Fosi ever makes a “Pro Plus Ultra Nuclear Edition,” I’ll be first in line — but until then, this thing is staying right where it is, working flawlessly while I grill, chill, and pretend I’m an audio engineer.
Reviewer: KPH
Rating: 5.0 out of 5 stars
Title: Great Little Integrated Amp!
Review: Great Little Integrated Amp! Very well made of all metal. Easy to assemble and set up. Bluetooth was easy to connect and works great. This little amp has lots of power and sounds great. Runs warm but not hot. A great inexpensive alternative to large, more expensive integrated amps.
Reviewer: Paul Klapper
Rating: 5.0 out of 5 stars
Title: Amazing Clean Powerful Streaming
Review: I admit that I have little knowledge of audioAnd electronics.I thought 300 watts of audio power had to come from a big heavy expensive amp. My new house came with 8 ceiling speakers . I had no idea whether they worked or sounded decent. The previous owner left an AVX speaker selector next to a bunch of speaker wires that were coming out of a wall port.I called Cambridge Audio and an advisor told me I would need to buy an amp costing at least $600 to run the speakers. Since I had no idea how it would sound , i looked on Amazon for an alternative. I took a chance on this tiny inexpensive Fosi amp to see if the setup even worked.It turns out that 3 of the 4 zones work and each sounds great using my phones Bluetooth and Apple Music through the Fosi into the speaker selector . I am being cautious with this setup , but I have determined that I can definitely power three zones simultaneously at rockin’ volume. The bass is not earth shaking , but is ok.I am amazed at the sound . Since the speaker selector has an impedance protector switch, I am relatively certain that I will be able to run 3 zones simultaneously without blowing out the speakers.I think the Fosi Amp is great . I am not audiophile and have reasonable expectations. The amp has an 18 month warranty. It is tiny and the Bluetooth is so strong that I do not have to leave my phone next to the amp.I highly recommend this tiny Bluetooth amp.
Reviewer: Eric
Rating: 5.0 out of 5 stars
Title: Great amp!
Review: Easy to setup, boosts power from a home-built desktop just as expected. It’s got the bass and treble, and a extra EQ software on my desktop allows the sound to flow out with richness and ease. Well worth the cost, it does exactly what I wanted it to. Don’t underestimate — size doesn’t matter!
Reviewer: Coder
Rating: 4.0 out of 5 stars
Title: Nice little bluetooth capable amp. buy it with the 48v power brick if you can
Review: Rather nice ittle amp with great specs. The power brick it came with was the 32v/5A. It can take a 48/5 power brick, which is strongly preferable. For one thing, cleaner, “effortless” bass, even at lower volume, and you get more distortion free watts. important: Buy it with the 48v PSU, from somewhere where you can chose that option. With that, it would be 5 stars . the stated wattage is optimistically stated. The usable wattage will be limited by the amount of distortion you can tolerate. With 8 ohm speakers, and the 48v brick, I guess you get maybe a clean 50W per channel, maybe. little more.The Amazon description may lead you to think that it comes with the 48v power brick, because it mentions 48v. What that really means, this unit “can take” up to 48v power. You may want high efficiency speakers with this. I use Infinity IL10 bookshelf speakers, and tried with Klipsch RP 820F-s both work great.
Reviewer: Murat Görentaş
Rating: 5.0 out of 5 stars
Title:
Review: Ürünü fiyatına göre değerlendirmenin daha doğru olacağı kanısındayım. Dali Oberon 3 ile kullanıyorum. Boyutuna göre, gerek detay, gerek bas ve tiz performansı olarak memnunum. Hızlı ve sorunsuz teslimat için Amazon’a teşekkürler.
Reviewer: C. J. Ochs
Rating: 5.0 out of 5 stars
Title:
Review: Works well and happy with the sound quality. Bluetooth connectivity reasonably.And looks and feels well made.I use it everyday all the time and it’s on for most of the day. No issue with performance.Currently driving a pair of B&W DM 110 speakers.
Reviewer: Anvilstrike
Rating: 5.0 out of 5 stars
Title:
Review: It seems that I got a particularly broken unit, in which the Bluetooth module caused an annoying crackling and buzzing sounds. The manufacturer’s support team was simply professional and I was positively surprised by the level of understanding and support I received.
Reviewer: Dany
Rating: 5.0 out of 5 stars
Title:
Review: Estuve comparando diferentes amplificadores de clase D para conectarlas a unas bocinas polk de exterior, entre ellos Nobsound y Dual, en alternativa a comprar un SMSL ya que sus precios son más elevados.Su tamaño compacto me pareció muy conveniente para su fácil almacenamiento, en comparación a otros como el Dual que es mas grande y voluminoso.Leyendo reseñas y viendo diferentes criticas de youtube me decidí por este amplificador Fosi, vi que un problema recurrente era la pobre conexión vía bluetooth, por lo que de antemano decidí comprar un adaptador para esta función, se puede conectar por los puertos RCA o por AUX.Probé la antena bluetooth que trae el producto y no me pareció mal si solo quieres tener un dispositivo conectado, pero si como yo, buscas que sea fácil cambiar entre dispositivos para reproducir audio y tener un rango mas amplio de conexión, te recomiendo comprar un adaptador multidispositivo con mas alcance.La calidad del sonido es muy buena, se puede apreciar bastante bien el sonido y tienes 3 controles para hacer modificaciones. Los controles de bajos y altos, hacen un buen trabajo pero nada excepcional, lo cual es aceptable por el precio del producto.
Reviewer: Geert De Dier
Rating: 5.0 out of 5 stars
Title:
Review: Heel klein toestel, stevige constructie, groot vermogen, uitstekende klank, wordt niet warm zelfs na 12 uur continu spelen. De Bluetooth werkt snel en perfect. Heb o.a. toestellen van Denon, Yamaha, Technics sedert jaren. Deze Fosi komt aardig in de buurt wat betreft geluidskwaliteit. Ik heb dit toestel gekocht na het lezen van massa”s reviews van over de hele wereld. Gewoon aangeschaft uit nieuwsgierigheid, en zoals de meeste bezitters ervan, aangenaam verrast door de kwaliteit en vermogen. Geen vervorming bij hoog volume, natuurlijk in combinatie met goede luidsprekers. Levert prima prestaties dit kleine ding. Voor zo’n prijsje bij Amazon deze kwaliteit en prestaties, niet twijfelen.
, Electronics > Home Audio > Home Theater > Receivers & Amplifiers > Amplifiers, #Fosi #Audio #BT20A #Pro #Bluetooth #Amplifier #300W #Wireless #Amp #TPA3255 #Ch..,
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