Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver with Bass Treble Control for Passive Speakers

A nice little amp. Power consumption: With the supplied 32V 5A power supply, the unit consumes 1.7W while waiting for a signal and 3.7W when either bluetooth or RCA inputs are active. In normal use amp only pull about 3.7-4.0W - this is a big improvement over lots of my classic, older stereo gear that idles at 10-30W. It means I can leave it on 24/7 without worrying about the electricity bill and extra heat generated. I tried the 48V 5A power supply, and it seemed like it did make the sound a little tighter, especially in the bass. But, I did not control for volume so it's possible it was just louder. With the 48V supply, the unit draws 3W when waiting for signal and 7.8W with the output amplifiers on. With the 7.8W of idle consumption, the unit gets quite warm to the touch, and the consumption starts to approach more-featured receivers. I swapped back to the 32V power supply as I intend to run this near-24/7 so energy costs are important. Bluetooth sounds good and is my main use case for this system, but I'm not that picky. I haven't done super critical nearfield testing, but it sounds great filling a large room with a pair of old floorstanders. The two-band EQ is very useful, and is largely why I picked this particular amp. With my big old speakers it works great to tame the rumble a bit and add some sparkle back in. It's kind of annoying that the Treble knob is to the left of the Bass knob, which is backwards from basically every single other amp out there. That's only noticeable from up close though. Power and Gain: The amp's power is good. If you feed it a powerful signal the amp will give you more than enough volume. Bluetooth signal level is high and the RCA input is fine for anything modern that's mixed loud. I only checked for a few seconds but this amp gets way louder than I would ever need. The gain is just OK. I think it's pretty standard as far as amps go. It's still a little bit disappointing because it's hard to get a program with low signal level loud enough. It would be nice if there was a little more gain on tap or a low gain/ high gain switch. I'm debating getting a preamp to put in front of it. Overall I think it works great, looks great, and it's been powered on playing music pretty much 24/7 since I got it

i have a lot of Fosi audio amps, this one,, sound incredible.. but i go to the next step and i buy the Fosi Audio 48v 5A powersupply... and i will give you my impressions about this powersupply and this amp. i recommend this amplifier... This power supply proved to be an outstanding choice, effortlessly driving my pair of high impedance speakers while delivering impeccable performance. With its reliability, robust build, and impressive capabilities, this power supply exceeded all my expectations. Performance and Compatibility: The 48V 5A power supply flawlessly powered my high impedance speakers, showcasing its exceptional performance capabilities. The impressive voltage output and ample current supply effortlessly met the demands of my amplifier, resulting in clear and dynamic sound reproduction. The power supply consistently delivered a clean and stable power signal, ensuring a distortion-free audio experience. Its compatibility with high impedance speakers allowed me to unlock their true potential, revealing nuanced details and captivating clarity that brought my music collection to life. Reliability and Build Quality: One of the standout features of this power supply is its remarkable reliability. From the moment I connected it to my amplifier, I experienced uninterrupted power delivery and consistent performance. The sturdy build and high-quality components instilled confidence, assuring me of its long-term durability. Additionally, the power supply's efficient cooling system prevented overheating, even during extended listening sessions, which further demonstrated its reliability under demanding conditions. Versatility and Safety: I appreciate the versatility this power supply offers. Its 48V output combined with a 5A current rating make it suitable for a range of audio systems, not just limited to high impedance speakers. Furthermore, the power supply incorporates several safety features, including short-circuit protection and overvoltage safeguards, ensuring the protection of my valuable audio equipment. Conclusion: In conclusion, the 48V 5A power supply has proven to be an exceptional choice for powering high impedance speakers. Its superior performance, reliability, and compatibility with a wide range of audio systems make it a standout option. Whether you're a casual listener or an avid audiophile, this power supply will undoubtedly enhance your audio experience.

I admit that I have little knowledge of audio And 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.

Picked this up to run a pair of old Cerwin-Vega RE series speakers from the 90s, and it worked out great. It’s got plenty of power to drive them and they still sound awesome. The Bluetooth makes it super easy to stream music without dragging out a full AV setup, which is exactly what I was trying to avoid. Setup was simple, and once it was hooked up, it just worked. No messing around, no headaches. It’s also nice not having a big receiver taking up space—this keeps things clean and minimal. Overall, great little amp that makes old speakers useful again without all the extra clutter.

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 Impressions This 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 happiness No proprietary weirdness. No random 4-pin blue plug. No tears. 🎵 Sound Quality Compared 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 pretending Honestly, for a backyard setup that sits in a protected cabinet, this little thing is the perfect “sweet spot.” 📡 Bluetooth Fast 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 Verdict If 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 Section My 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.

After my big ‘stereo down size’ about 6-8 years ago, I ran my streamers into a Kinter K2020a+ and a Polk Audio shelf speaker set… and I was as happy as a kid in a candy shop. Recently I sensed one of the channels was beginning to get a little less clean and decided to cast around for an upgrade. I actually had the next model down (BT10?) in my basket, read about the more powerful BT20 Pro, and made the leap. Glad I did! Product is elegantly packaged. Bluetooth connection was a breeze. Press the volume knob for 5 seconds to disconnect BT and connect to another source. EQ is simple and effective. I truly dig the way under stated light gray steel appearance, Power switch and 3 knobs on the face. Device feels solid. Dual speaker connection types, easy to hook up. Less is more. Proof is in the pudding - the sound.. and it doesn’t disappoint. Versus the Kinter (which, of course, does not punch as many watts) it is clearer and deeper, and, if you want, much louder. For me the key is clarity at a lower volume (I am running it as sound in a modest art studio). Whether it is piano jazz from Fergus McCreadie, new acoustic from Halaiker, experimental from Ezra Feinberg or African string music… it all comes thru in great style. It will rattle the windows if turned up, but I really love the clear almost analog sound of all my genres at medium to low levels. Great stuff and worth the modest $ upchrge.

Fabulous product. Ample power, excellent low end and channel separation. Works as good if not better than advertised.

Short and to the Point Review: Well-made small Class D amplifier with good separation and very musical. Use for small home stereo system or PC passive speakers. R/L RCA inputs, L/R passive speaker outputs, Bluetooth, Treble/Bass/Volume controls. Long and Rambling Review: I have used this amp daily since I purchased it. Plenty loud if you want it. Very clean sound. I’m using it with a pair of passive Edifier speakers. I have been using Edifier powered Class D speakers on my PC for 5 years and love them. Decided it was time for something new and transferred the Edifiers to one of my TV’s. This Fosi BT20A Pro has better sound than the Edifiers and that is saying something. The Edifier passive speakers are P12’s and are identical to the powered R1280DB minus the amp. So the comparison in sound quality should be valid. This amp ships with the 32V supply. You can buy the 48V power supply separately for more power output but it’s 2/3’s the price of this amp. That’s my only con, this amp should ship with the 48V supply. Charge a bit more Fosi, but ditch the lower power supply or give an option when purchasing the amp. I found a website that puts various amps through their paces, audiosciencereview. Their methodology basically blew me away. I’ve been involved in audio since the 1960’s and thought I was well versed in amplifier technology since it was part of my engineering major and licensing. These guys take it to another level I didn’t even know existed. Anyways they gave a strong recommendation on this Fosi amplifier and that made me comfortable in making this purchase. If you visit their website, don’t worry about interpreting the graphs, they explain the results in English. I have an audiophile system (actually many of them – Sansui, Pioneer, Kenwood, Yamaha etc from the 1970’s) as I refurbished consumer to professional reel-to-reel, power amps, preamps as a side gig and sold gear all over the world for many years. So, I guess those are my Bona fide’s as I can be extremely critical of how equipment is supposed to sound. Originally, I was not a fan of Class D amps especially listening to music with them. Great for phones – small size, large sound, small PC speakers but not a real stereo system. The Edifiers changed my mind and this Fosi has shown me that this class of amps has improved markedly over the years. One Caveat: if your phone is nearby with BT enabled and you turn the amp on, it will pair to your phone disabling your RCA inputs from your PC. Gets me every time. Retired Military Aerospace and Industrial Manufacturing Engineer

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.

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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.

I am incredibly impressed with the Fosi Audio BT20A. Setting it up was an absolute breeze, taking only a few minutes from unboxing to playing music. It integrates seamlessly with my turntable setup, delivering clean, crisp, and punchy sound that breathes new life into my vinyl collection. The ability to switch over to Bluetooth streaming is a game-changer. The wireless connection is rock-solid, has great range, and makes it effortless to stream playlists straight from my phone. For its compact size and affordable price, the sound quality and power output are remarkable. It fits perfectly on my shelf without cluttering the space. If you need a reliable, budget-friendly amplifier that handles both classic analog vinyl and modern wireless streaming without any fuss, this is the one to get!

J’ai choisi ce ampli après avoir fait quelques recherches sur le net car je voulais pouvoir brancher mes enceintes extérieures et profiter de la musique dans le jardin et autour de la piscine. Franchement, je ne suis vraiment pas déçu de mon achat. L’ampli est compact, discret et ne prend pas beaucoup de place, mais il envoie largement ce qu’il faut pour mon utilisation. Je le connecte principalement en Bluetooth avec mon téléphone ce qui me permet de lancer facilement ma musique sans avoir besoin de câbles partout. La connexion se fait simplement et rapidement et une fois lancé, tout fonctionne très bien. Le rendu sonore est vraiment top. Pour une installation extérieure, je voulais quelque chose de propre, agréable et suffisamment puissant pour avoir un bon fond musical sans que ce soit agressif. Et là, c’est exactement ce que je recherchais. Quand tout le monde est dans la piscine avec une musique en fond, l’ambiance est parfaite. J’apprécie aussi beaucoup les réglages des basses et des aigus. Cela permet d’adapter le son selon le style de musique, l’endroit où l’on se trouve ou simplement selon ses préférences. On peut vraiment obtenir un rendu qui correspond à ce que l’on aime et c’est un vrai plus. À la maison, tout le monde est content. C’est devenu un petit élément indispensable pour profiter des beaux jours, des repas dehors ou des moments détente en famille. Pour sa taille, il fait vraiment très bien le travail et donne une belle impression de qualité. Très satisfait de cet ampli, simple à utiliser, efficace et avec un très bon son. Je le recommande sans hésiter pour ceux qui veulent alimenter des enceintes et profiter d’une bonne ambiance musicale à la maison ou en extérieur.