I just bought this tiny Bluetooth amp for less than £50 in the Black Friday sale and it’s already changed the way I listen to music

Fosi bluetooth amp and a Rubiks cube for scale
(Image credit: Future)

Do you have some old speakers in your garage – maybe from a 5:1 system that got binned when you got a soundbar? Did you pack away your old hi-fi speakers when you got that JBL Boombox? Did you stick an Amazon Dot in the bedroom and kid yourself that would do?

I feel your pain. I did all those things and I’m here to tell you some good news. You can buy a tiny Bluetooth speaker about the size of a cigarette packet, plug it into those old speakers and get an amazing sound - all for less than £50, with this Fosi Audio Bluetooth amp that’s 41% off in the Amazon Black Friday sale.

And I can say it with confidence because I bought not one but TWO a week ago and it’s already changed the way I listen to music.

Fosi Audio Bluetooth Amp: Was £84.99, Now £49.99

Fosi Audio Bluetooth Amp: Was £84.99, Now £49.99
Small, loud, simple to operate, connects to all regular speakers, the Fosi connects to Bluetooth easily and well: leave the room with your phone in your pocket, or go in your en suite, and it still receives without cutting out or crackling. An easy and affordable way to re-use old speakers and bring audio to spare rooms, garages, games rooms etc. 

Here’s how and why. I had two problems:

1) In lockdown we transformed our garage into a gym. Cleared it out, stuck a bike on a trainer, got a weight bench, stuck a Bluetooth speaker in there, bosh. But a tinny Bluetooth speaker in an unfurnished garage, when you’re pedaling on a bike? It’s audio carnage.

2) A decade ago, we extended into our loft. I thought ahead and had speakers fitted into the walls in the bedroom and en suite. I bought a little amp with an aux input so that I could plug my phone into it. Awesome. But then Apple changed the outputs on the iPhone. Uh-oh. Then the amp started to play up. So I got an Amazon Dot. With work-from-home, I spend more time in my bedroom than ever before and, with the Dot, I could connect easily and the sound was… OK. 

This is where the Fosi comes in. Now I’m no hi-fi expert, I have no idea who Fosi are  (I Googled it: they're a Chinese company) – and sure, you can get Sonos or Denon or some other fancy-dan multi-room set up – but if you want an affordable, unobtrusive alternative, this could be it. 

I told you it was tiny, didn’t I? Look: I took it around my house to give you idea of how big it is (it’s the same length as a 330ml drinks can):

Fosi Bluetooth Speaker

The Fosi Bluetooth Speaker and a beer I'm going to drink as soon as I've written this.  (Image credit: Future)

Fosi Bluetooth amp

End to end, it's the same size as a 330ml drinks can. (Image credit: Future)

Fosi Bluetooth Speaker

In one of my kids' rooms. That's a regular Rubik's Cube. (Image credit: Future)

Fosi Bluetooth Speaker

The inputs: connect by banana cable plugs or just unscrew the terminals, thread the bare speaker wire through the holes and re-tighten. (Image credit: Future)

It connects to the built-in speakers in my bedroom by banana cable plugs. (In fact, you don’t even need those – you can just thread the bar speaker wire through the terminals at the back and tighten – in my previous experience, though, you get a bit of crackle.) You plug it in. You connect by Bluetooth, you turn up the bass. Compared to the Amazon Dot, the sound is warm and full, louder than you could ever want, and you can control the volume with your phone’s volume buttons. 

In the garage, I plugged it into two of the speakers from an 5:1 set-up I had. Tucked either side of the garage walls, the sound fills the room. You could have a party in there. 

I mean, it would be weird – it would smell of white spirit and you might trip over a rake – but it’d be loud enough. 

Scott Rowley
Content Director, Music

Scott is the Content Director of Music at Future plc, responsible for the editorial strategy of online and print brands like Louder, Classic Rock, Metal Hammer, Prog, Guitarist, Guitar World, Guitar Player, Total Guitar etc. He was Editor in Chief of Classic Rock magazine for 10 years and Editor of Total Guitar for 4 years and has contributed to The Big Issue, Esquire and more. Scott wrote chapters for two of legendary sleeve designer Storm Thorgerson's books (For The Love Of Vinyl, 2009, and Gathering Storm, 2015). He regularly appears on Classic Rock’s podcast, The 20 Million Club, and was the writer/researcher on 2017’s Mick Ronson documentary Beside Bowie