Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker

I got this to run some higher end home audio speakers installed outside for the yard/pool area at our house. The speakers are $300 each and I had been running it on an older Sony coil-based home theater amp because I thought I needed the zones and independent volume controls/management for tone/eq. The amp in the cabinet indoors was putting out quite a bit of heat when it was powered on whether they were in use or not. The wiring was a total mess and I bluntly didn't enjoy dealing with it. I went in to this project assuming I was going to get a Denon, Onkyo, Yamaha, or some home audio mixer board + eq, or something fancy with roughly $2k budget... I was on struggle street trying to piece it all together. I only need a simple input amp. I have a cheap class T amp in my garage that works for what I am doing there, but the audio quality is trash. I rolled the dice and picked up a few of these and man, they blew my mind. They have a lot of punch/power and the audio quality is REALLY surprising compared to the old stuff I had. The BT connection is ROCK SOLID. A lot of these cheap china BT interfaces are trash and buggy. This thing pairs right up and is solid and reliable. I'm waiting on the splitters to feed the source to all of them, but per zone, they're superb. Super straightforward install and good labeling, pair with FosiXXX and go for BT. It's a small, light package and the box it comes in is pretty good for it's weight and has some heft. Not sure whether the weight is from the case or components, but it's a mosfet so we'll see about heat dissipation down the road and whether it does a thermal cutoff or not. I might end up getting more for the garage after a few sessions in the backyard. I was pleasantly surprised!

TL;DR: This works exactly as it should. Great piece of equipment is such a tiny form factor I've been meaning to setup a more permanent outdoor speaker solution to my backyard and was going to go with the old fashioned "run 200 feet of speaker cable" because the high receiver I bought was pretty far away and I was going to use Zone 2 for the speakers. But this little package came up on my searches and it was exactly what I wanted and more. There is an area in the backyard that we set up outdoor movies at and I use a portable speaker for sound. Instead it dawned on me that not only can i stream music from any source with this bluetooth connection to this device, I can also double up and use it for outdoor movies if I place them correctly. Well I found an outdoor telephone jack and indoor jack and I was able to run audio cable outside through those openings which were right next to where I would put the movie screen. So I was able to put two outdoor speakers in a place so that it can provide sound for movies AND they are in a general area that I can stream/play music for the backyard in general. No need to wire anything from the receiver and eliminates the need to bring out a boombox outdoor speaker for movies. What I was really happy about is how fast and solid the bluetooth connection is. I use an old laptop for streaming music and store all my ripped CDs. I thought I was going to have to hardwire the laptop to this Fosi amp because the laptop is like six years old. After a little work and trial and error, I finally figured it out and it works. The first time the laptop had a hard time finding it but now that it is in the list of known devices, it connects flawlessly. I tried iphones, tables, etc. and all of the newer devices find it with no problems. Even my echo show found it and its about 40 feet away in another room. Movies sound great, have my Lounge music running at night and I'm so happy about this setup. And, going back to my resistance to running cable, I only need 30 feet of outdoor cable for both speakers so it was convenience too. Highly recommend this product: very inexpensive, does exactly what it is supposed to and greatly enhances the flexibility of what you can do.

Easy to setup, works with regular speaker wire, supports our 100W speakers beautifully. Nice controls for the treble and bass. LOUD!! We use the Bluetooth to seamlessly connect with our record player and our phones. It's and amazing little amplifier that does the job well!

I love the sound quality and for such a tiny thing it is fairly robust. I’ve been using this now for 3.5 years without any problems until today when the micro on/off switch busted inside. It is the only part that could stand to be beefier. I figured it was toast but I took it apart, removed the switch, and found two of the 7 contacts that I could jump with a blob of solder. It works great again and I just use the plug as the on/off. One other very minor inconvenience is that it doesn’t auto-connect to my phone but I can live with that.

When it comes to amplifiers, the Fosi Audio BT20A Bluetooth Speaker Amp is an undisputed game-changer. Encased in a modestly compact form, this small but mighty beast asserts the timeless adage that size isn't everything. It defies its dimensions, delivering an impressive level of power that can rival or even surpass larger counterparts. The first thing you'll notice about the BT20A is its design. Don't be fooled by its diminutive size; this amplifier does not compromise on quality or performance. The unit packs a serious punch for a device of its stature. It's engineered with high power output to deliver crystal clear, rich, and detailed sound to your speakers. The BT20A boasts an impressive feature set, including its Bluetooth functionality. The Bluetooth connection is smooth and reliable, extending a generous range that grants you the freedom to roam while maintaining control over your audio. Whether you're looking to pump up the volume for a backyard barbecue or craving some soothing tunes in the tranquility of your study room, the BT20A delivers outstanding performance with style and ease. But what truly sets the Fosi Audio BT20A apart is not just its superb performance and compact design; it's the company's exceptional commitment to customer satisfaction. I experienced a minor hiccup with the Bluetooth connectivity of the first unit, but Fosi Audio's customer service was absolutely stellar. They promptly sent out a replacement, ensuring that the minor setback was resolved efficiently and I could get back to enjoying my music without delay. Fosi Audio's willingness to stand by their product and swiftly address any issues is highly commendable. It's a testament to their dedication to providing a top-notch customer experience, further adding to the already spectacular appeal of the BT20A. In conclusion, the Fosi Audio BT20A is a true titan in a compact package. Its powerful output, seamless Bluetooth connectivity, and Fosi Audio's stellar customer service make it an unparalleled choice for anyone looking to enhance their audio experience. If you're seeking a small, powerful, and reliable Bluetooth amplifier, I wholeheartedly recommend the Fosi Audio BT20A. It may be small in size, but it's big on performance.

Couldn’t be happier with this product and Fosi Audio as a whole. The amplifier itself is well-built, feels solid, looks great, and produces clear crisp sound. Bluetooth communication is seamless and streaming quality is excellent, as well. My first unit experienced a failure; however, I contacted Fosi Audio via email and they were very responsive to troubleshoot, and subsequently ship a replacement to me. I really appreciate a company that stands behind their product and their customers. This experience has surely made me a faithful lifelong Fosi Audio customer.

This is an excellent compact amplifier for powering bookshelf speakers. The fact that it includes Bluetooth connectivity is an added bonus. I attached an Amazon Alexa device using the line-in jacks and the audio quality was great. I was impressed by the volume level that could be achieved. The only downside when using Bluetooth is that you have to re-pair the device with your phone each time you turn on the amplifier.

I don't write reviews anymore lately but I've had a good experience with the Fosi BT20A that I feel is worth sharing. I purchased the BT20A because I had a long-silent pair of Signet SL-260 speakers from over a decade ago that were great budget audiophile speakers but had sat unused. I just didn't have any more 2-channel or AV systems in the house that needed a set of speakers. So I figured that I'd bring them fully into the future-present by integrating them into my Alexa ecosystem. This consists of quite a few Echo Dots situated around the house, including my office. I had been using a twinkie-sized BT speaker with the Dot in my office and you can imagine that the sound quality was unimpressive to say the least. Based on research, the BT20A seemed exactly what I needed, a reasonably powerful Bluetooth enabled device that could directly drive unpowered speakers with a quality signal at reasonable levels of volume. As for this goal, the BT20A met my needs exactly and fully. Now I can stream my Amazon Music Unlimited playlists from the office Dot to the BT20A which drives the SL-260 speakers directly. Now I can listen to my music at high quality. Very satisfying. I should note one quirk of the system. The BT20A was able to quickly be detected and linked using my iPhone 12 Pro, but initially I could not get the Alexa app or the Echo Dot directly to find the BT20A. Internet and forum searches here were fruitless. Finally, I tried something unusual. Thinking that maybe for whatever reason the Echo Dot's search wasn't triggering the BT linking capability of the BT20A, i tried it again at the same time as I put another BT speaker into linkup mode. Immediately, the Alexa app showed that my Echo Dot now saw the BT speaker AND the Fosi. From there I selected the Fosi and from that point on, the Dot and BT20A could find each other any time I wanted to use the system. Odd but works. Fosi support actually responded within 10 hrs of my help request and were pleasant but I solved this one on my own. Never would I have imagined that there was such a device as this, but now that I've found it, I can bring high quality sound anywhere around the house I want without having to move stereo components or settle for typical BT portable speakers. And at a cost that's actually an amazing value. I love it! I have included a picture of my super little system. Super happy overall with the sound for dollar punch these little components.