Product Dimensions | 13.21 x 11.99 x 3.51 cm; 1.1 kg |
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Item model number | BT30D |
Colour | Black |
Compatible Devices | Speaker |
Connector | RCA |
Output Wattage | 200 Watts |
Media Format | WMA |
Voltage | 230 Volts |
Wattage | 200 watts |
Item Weight | 1.1 kg |
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Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Passive Speakers/Subwoofer Powered Subwoofer
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Purchase options and add-ons
Item dimensions L x W x H | 13.2 x 12 x 3.5 centimetres |
Voltage | 230 Volts |
Manufacturer | Fosi Audio |
Maximum supply voltage | 24 Volts |
Mounting type | Surface Mount |
About this item
- BT30D wireless stereo amplifier adopts 2 pcs Texas Instruments TPA3116D2 chip. The TPA3116D2 are stereo efficient and digital amplifier power stage for driving speakers, with advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences. High-performance effectively improve output power and audio quality. Max power output up to 200Watt.
- 2.1CH Bluetooth 5.0 Power Amplifier. A new generation: exquisite design, improved operation, great sound performance.
- BT30D supporting Bluetooth and RCA input can drive most passive speakers and passive/powered subwoofer. SUB volume/Frequency, Bass/Treble control ensure Hi-Fi music quality.
- Adopt 2 pcs Texas Instruments TPA3116D2 chip. High-performance effectively improve output power and audio quality. Max power output up to 200Watt.
- What You Get: BT30D Amp, 24V/4.5A power supply, user manual, our worry-free 24-month warranty, and friendly customer service.
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Get to know about Fosi Audio
For the past 5 years, we have been designing and developing audio products for real life, aiming to provide a perfect blend of premium acoustic performance with a modern, elegant design.
Why do we love what we do?
We’re not limited by what’s possible now. With a bold vision for the future of audio products, we painstakingly develop advanced technology and innovative research to make it a reality.
Why choose Fosi Audio?
We use meticulous production technology, combined with low-key modern industrial design, to present the sound as clear and pure as flawless crystal.
Product Description



Hi-Fi Amplifier

Our Story
Fosi Audio was founded with a simple goal: Build products that bring people soft clear and warm sound. We design, produce, and sell many kinds of Hi-Fi audio products on the market to meet different people's needs. We pursue the perfect music journey like you do. Let's enjoy Hi-Fi music with Fosi Audio audio products.
Product Parameters:
2.1 CH Bluetooth Stereo Amp
- Power Adapter: 24V/4.5A
- DC Input Range: 12-24V
- THD: ≤ 0.04%, SNR: ≥ 98dB
- Frequency Range: 20Hz - 20kHz (±1 dB)
- Input Sensitivity: ≤ 280mV;
- Terminating Impedance: 2 - 8 Ohm
- MAX Power Output: 50W x 2+100W
- Input Mode: Bluetooth and RCA
- Bluetooth Transmission Distance: Up to 50 Ft
- Package Include: BT3D Amp, Power Supply, User Manual
Add powerful home theater quality sound performance to your desktop with compact amplifier style.
Deliver clear, accurate sound that's loaded with Subwoofer volume and frequency control
The upgraded DC outlet with a built-in power protection circuit, safe for use.
The Fosi Audio BT30D Bluetooth Stereo Amplifier Receiver is the perfect solution for all of your audio needs!
Bluetooth 5.0 wireless audio streaming along with RCA jack to directly connect & stream audio from external devices.
Fosi Audio BT30D amp comes with the energy-efficient and stable 24V/4.5A power supply can get efficient output power.
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Customer Reviews |
4.3 out of 5 stars 2,605
|
4.2 out of 5 stars 400
|
4.4 out of 5 stars 1,085
|
4.5 out of 5 stars 8,559
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4.5 out of 5 stars 4,149
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4.2 out of 5 stars 446
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Price | £99.99£99.99 | — no data | £99.99£99.99 | £79.99£79.99 | £59.99£59.99 | — no data |
Type | Bluetooth 2.1 CH Amp | Bluetooth 2.1 CH Amp with Remote Control | Bluetooth 2.1 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth DAC 2.1 CH Amp with Remote Control |
Input | Bluetooth + RCA | Bluetooth + 3.5mm AUX + U-disk | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + 3.5mm AUX | Bluetooth 5.0 + 3.5mm AUX + USB + Optical + Coaxial |
Output | Passive Speakers+Active/Passive Subwoofer | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive/Active Speakers+Subwoofer | Passive Speakers | Passive Speakers | Passive Speakers + Active Subwoofer |
Treble & Bass Control | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
THD | ≤ 0.04% | ≤ 0.001% | ≤ 0.03% | ≤ 0.04% | ≤ 0.04% | ≤0.01% |
SNR | ≥ 98dB | ≥ 92dB | ≥ 108dB | ≥ 98dB | ≥ 98dB | ≥105dB |
Power Adapter | 24V/4.5A | 24V/4.5A | 32V/5A | 24V/4.5A | 19V/4.74A | 24V/4.5A |
Work Voltage | 50W x 2+100W | 100W x 2 | 165W × 2+350W | 100W x 2 | 50W x 2 | 50W x 2 |
Compare with similar items
This item ![]() Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Passive Speakers/Subwoofer Powered Subwoofer | Recommendations | |||||
Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | |
Price | £99.99£99.99 | £89.99£89.99 | £69.99£69.99 | -22% £93.49£93.49 Was: £119.99 | £99.99£99.99 | £119.99£119.99 |
Delivery | Get it as soon as Wednesday, May 28 | Get it as soon as Wednesday, May 28 | Get it as soon as Wednesday, May 28 | Get it as soon as Wednesday, May 28 | Get it as soon as Wednesday, May 28 | Get it as soon as Wednesday, May 28 |
Customer Ratings | ||||||
Sold by | Fosi Audio Factory | Fosi Audio Factory | YIMA-TECHNOLOGY | YIMA-TECHNOLOGY | Fosi Audio Factory | Fosi Audio Factory |
number of channels | 3 | 2 | 2 | 2 | 2 | 5 |
voltage | 230 volts | 230 volts | 24 volts | 230 volts | 230 volts | 230 volts |
output power | 200 watts | 600 watts | 100 watts | 300 watts | 200 watts | — |
specification met | — | FCC | FCC | CE | Energy Star, Local Safety Standards | — |
mounting type | Surface Mount | Surface Mount | Wall mounting | Tabletop | Freestanding | Surface Mount |
Product information
Technical Details
Additional Information
ASIN | B07K7NJ4QN |
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Customer Reviews |
4.3 out of 5 stars |
Best Sellers Rank | 46,978 in Electronics & Photo (See Top 100 in Electronics & Photo) 216 in Hi-Fi Amplifiers |
Date First Available | 19 Nov. 2018 |
Warranty & Support
Feedback

Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Passive Speakers/Subwoofer Powered Subwoofer
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Product details
- Is discontinued by manufacturer : No
- Product Dimensions : 13.21 x 11.99 x 3.51 cm; 1.1 kg
- Manufacturer : Fosi Audio
- ASIN : B07K7NJ4QN
- Item model number : BT30D
- Country of origin : China
- Customer reviews:
Customer reviews
Customer Reviews, including Product Star Ratings, help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the amplifier fantastic for the money, with easy Bluetooth connectivity and good build quality. They appreciate its compact size, with one customer noting it's a space-saving replacement for a 25-year-old amp. The sound quality receives mixed feedback - while some find it phenomenal, others report weak volume and muddy bass. The functionality and build quality also get mixed reviews, with some saying it works well while others find it unusable.
AI-generated from the text of customer reviews
Customers praise the amplifier's performance, with one customer noting it handles speakers and subwoofers well, while another mentions it delivers solid bass rhythms.
"Perfect little amp. Stylist and functional. Ideal for my needs. I have it hooked up to a pair of old Pioneer (100w) speakers, plus a Polk subwoofer...." Read more
"...unit provides a surprisingly wide spacious sound stage and good solid bass rhythms, the bass goes deep as well and sounded like it actually had more..." Read more
"Great little amp. I paired it with Klipsch R 41m's and it can shake the room when pushed no distortions that I can hear, pretty amazing...." Read more
"It's a wonderful amplifier, but from day one power socket is lose, I thought it was on floor, that's why breaking so 9ften.but I changed the power..." Read more
Customers find the amplifier offers great sound quality for its price.
"Remarkable sound for the cost (after a few hour use to burn in) I hooked this little thing up to my Monitor Audio Silver 200' floorstanders and..." Read more
"...small and compact with good Bluetooth connectivity sounds very good for the price." Read more
"...The bluetooth connection works great. Great value for money no regrets whatsoever." Read more
"...It's a nice bit of kit but at the end of the day, you can get the same amp board off eBay for less than 20 quid and it'll do the same thing, just..." Read more
Customers appreciate the amplifier's Bluetooth connectivity, finding it easy to set up and connect to devices, with one customer noting reliable performance.
"...The units MAX Power Output: 50W x 2+100W. The Bluetooth is fine, and the connection was quick...." Read more
"...product Works well simple to use, small and compact with good Bluetooth connectivity sounds very good for the price." Read more
"...The bluetooth connection works great. Great value for money no regrets whatsoever." Read more
"RCA connects, Bluetooth is easy to connect to, with great range, feels like nice quality controls...." Read more
Customers appreciate the compact size of the amplifier, with one mentioning it's a space-saving replacement for a 25-year-old unit.
"...Good sound for me, but I’m not audio master. It packs a punch for such a small amp, it handles my speakers and sub well...." Read more
"Typical Fosi product Works well simple to use, small and compact with good Bluetooth connectivity sounds very good for the price." Read more
"...the analogue sub output and for this it is very useful along with its size and bluetooth connections...." Read more
"...I am very pleased with what I bought. It is a nice small but powerful unit which has improved my audio visual appreciation considerably...." Read more
Customers have mixed opinions about the amplifier's sound quality, with some finding it phenomenal while others report issues with weak volume, muddy bass, and crackling in the right output.
"...Comfortably drives more volume than I need to annoy neighbours from a pair of 8 ohm mission bookshelf type speakers...." Read more
"...wide spacious sound stage and good solid bass rhythms, the bass goes deep as well and sounded like it actually had more low end clout than my £1500..." Read more
"It is a good amp. And i like the ability to output to a sub speaker. You can output to a passive or a powered sub, so that is good...." Read more
"...It works very well and sounds great, nice build quality and easily adjustable controls for the subwoofer crossover...." Read more
Customers have mixed opinions about the build quality of the amplifier, with some praising its construction while others report issues with durability, with one customer noting it breaks frequently.
"Nice sturdy little box with dials feels like an amp should should just tiny...." Read more
"...The Bluetooth is fine, and the connection was quick. It does from time to time drop out, even when my mp3 player is only 2-3 metres away, but in the..." Read more
"...It works very well and sounds great, nice build quality and easily adjustable controls for the subwoofer crossover...." Read more
"...down is on refinement to the music, it's a little course and hard in the treble quality and lacks the fluid creamy sound of a good hifi amp so it's..." Read more
Customers have mixed experiences with the amplifier's functionality, with some reporting it works very well and is easy to use, while others find it unusable.
"Perfect little amp. Stylist and functional. Ideal for my needs. I have it hooked up to a pair of old Pioneer (100w) speakers, plus a Polk subwoofer...." Read more
"Typical Fosi product Works well simple to use, small and compact with good Bluetooth connectivity sounds very good for the price." Read more
"...The hiss when sitting in front of near field monitors makes it almost unusable and it will be getting removed from my system...." Read more
"...It works very well and sounds great, nice build quality and easily adjustable controls for the subwoofer crossover...." Read more
Reviews with images

GREAT SOUND, GREAT BUILD, AND QUALITY.
Top reviews from United Kingdom
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- Reviewed in the United Kingdom on 8 February 2021Colour Name: BlackVerified PurchasePerfect little amp. Stylist and functional. Ideal for my needs. I have it hooked up to a pair of old Pioneer (100w) speakers, plus a Polk subwoofer. The units MAX Power Output: 50W x 2+100W.
The Bluetooth is fine, and the connection was quick. It does from time to time drop out, even when my mp3 player is only 2-3 metres away, but in the main its stable. I have notice though, that using my other MP3 player, which is an iPod touch, then I get no drop out. Its very loud when I want it to be, I control volume via the mp3 player.
Good sound for me, but I’m not audio master. It packs a punch for such a small amp, it handles my speakers and sub well.
I would definitely recommend this unit to my family, friends and colleagues.
5.0 out of 5 starsPerfect little amp. Stylist and functional. Ideal for my needs. I have it hooked up to a pair of old Pioneer (100w) speakers, plus a Polk subwoofer. The units MAX Power Output: 50W x 2+100W.GREAT SOUND, GREAT BUILD, AND QUALITY.
Reviewed in the United Kingdom on 8 February 2021
The Bluetooth is fine, and the connection was quick. It does from time to time drop out, even when my mp3 player is only 2-3 metres away, but in the main its stable. I have notice though, that using my other MP3 player, which is an iPod touch, then I get no drop out. Its very loud when I want it to be, I control volume via the mp3 player.
Good sound for me, but I’m not audio master. It packs a punch for such a small amp, it handles my speakers and sub well.
I would definitely recommend this unit to my family, friends and colleagues.
Images in this review
- Reviewed in the United Kingdom on 30 May 2022Colour Name: BlackVerified PurchaseNice sturdy little box with dials feels like an amp should should just tiny. Sounds great with connected echo input or phone over bluetooth certainly no worse than entry level '90s predecessor. Comfortably drives more volume than I need to annoy neighbours from a pair of 8 ohm mission bookshelf type speakers.
I now have lots of space and removed nagging feeling I was burning £5 notes using the old one even if it takes about 10 years to pay for itself.
Negatives, the bluetooth arial dwarfs it and rather ruins the lines could be useful outside.
No L/R balance but something I don't use.
No way to prioritize line-in over bluetooth and have to tell connected device to disconnect.
But for the money cannot complain about minor compromises (£84 deal) so still 5*.
Probably would have gone for model down without the sub out but at the deal price this was cheaper at time.
- Reviewed in the United Kingdom on 1 March 2021Colour Name: BlackVerified PurchaseRemarkable sound for the cost (after a few hour use to burn in) I hooked this little thing up to my Monitor Audio Silver 200' floorstanders and using a good source like my Cambridge CXU into the phono's and playing CD's this unit provides a surprisingly wide spacious sound stage and good solid bass rhythms, the bass goes deep as well and sounded like it actually had more low end clout than my £1500 hifi amp, the sound gives good bite and texture to instruments making strings, violins and cello's etc sound very real, I was shocked how good it sounded tbh.
Of course all is not perfect (lets not forget its and 85 quid mini amp) and where this little digital amp falls down is on refinement to the music, it's a little course and hard in the treble quality and lacks the fluid creamy sound of a good hifi amp so it's certainly not a substitute for a good hifi amp but as a bedroom setup or for the computer it's excellent.
I then connected it to my THX soundworks computer speakers and 8 inch passive sub and again it proves excellent with more power and punch than I will ever need, even with the standard power brick it has lots of usable volume.
Bluetooth sounds just OK as you'd expect and the signal is stable BUT the major flaw in this unit is ANYONE ELSE CAN CONNECT AND PLAY MUSIC OVER IT via Bluetooth WITHOUT your permission as it does not have a pair button or ask for a code on your phone, this is really stupid and why I have only given 4 stars.
- Reviewed in the United Kingdom on 28 October 2024Colour Name: BlackVerified PurchaseTypical Fosi product Works well simple to use, small and compact with good Bluetooth connectivity sounds very good for the price.
- Reviewed in the United Kingdom on 14 February 2024Colour Name: BlackVerified PurchasePleasantly surprised by how nice this little amp sounds! Bought it to use on my PC for music etc.. Hooked it to a pair of Denon bookshelf speakers and a Pioneer passive sub and the sound is great. A few little tweaks to the sound adjuster knobs on the front and its sounds lovely.
One thing to note that using a 3.5mm to RCA from my PC's motherboard, the volume is crazy loud! my PC's volume bar is on 40% and its more than loud enough. The volume knob on the amp isn't even quarter turn.. So just be warned if using with a PC.
Otherwise.. a top piece of kit :)
- Reviewed in the United Kingdom on 14 August 2023Colour Name: BlackVerified Purchasepower ratings are not RMS but peak,and on stand-by ,and impressed onto your audio is 50 hz from PSU ,IA ran an earth lead from amp to my PC,That cured it and ferite clip on filters on AF input.
- Reviewed in the United Kingdom on 10 May 2021Colour Name: BlackVerified PurchaseGreat little amp. I paired it with Klipsch R 41m's and it can shake the room when pushed no distortions that I can hear, pretty amazing. It does have some static noise coming out if you crank up the dial with highs but its only audible when you dont play anything; when music is on you cant hear it. I cant say anything about the sub output since I dont have a sub. The bluetooth connection works great. Great value for money no regrets whatsoever.
- Reviewed in the United Kingdom on 23 November 2024Colour Name: BlackVerified PurchaseIt's a wonderful amplifier, but from day one power socket is lose, I thought it was on floor, that's why breaking so 9ften.but I changed the power source/adaptor but I learn socket is loose, I put sticky tape on it, it's still bubbly
Top reviews from other countries
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No NameReviewed in Japan on 14 May 2025
5.0 out of 5 stars 普通につかえるコンポスタイルがやはり音楽的には良い
Colour Name: BlackVerified PurchaseほとんどBluetoothでのApple Musicしか聴かないのでメインオーディオ装置として導入しました。
そんな厳密にオーディオに詳しく耳が良いわけではありません。ステレオポジションでの設置位置とスピーカーサイズが大きくなれば音場は豊かになるので、とても満足してます。
高い一体型のBluetoothスピーカー買うよりも、古いスピーカー活用してこれを置いたほうが安くても音楽的には幸せになります。
サブウーファー端子もパッシブとパワード両方であるので、これも経過年数でジャンク品になってるものでもいいので有れば低音出て幸せです。
そういう使い方の懐が深いBluetoothアンプです。
この後、バッテリー付きのBluetoothレシーバーを別に買ったのですが、Bluetoothの接続とオートパワーオフで帰宅のたびにスイッチオンしなければいけない状況となり、普通に繋がるこれの良さを再認識しました。
- RussellReviewed in Australia on 30 September 2022
5.0 out of 5 stars Great for the price
Colour Name: BlackVerified PurchaseThe unit itself feels to be good quality. All of the knobs are nice to use etc. Bluetooth seems to work well in close proximity but haven't tried through walls or anything. Sound quality is okay, and drives my wharfdale bookshelf speakers reasonably well.
Good:
- Price
- Build quality/feel
- Does what it says on the tin
Not so good:
- Sound quality (as you might expect at this price)
Good value little package!
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Excellent fonctionne super bien. Très contentReviewed in Belgium on 10 January 2025
5.0 out of 5 stars Excellent
Colour Name: BlackVerified PurchaseVraiment excellent !!!! L'ampli est vraiment minuscule réglage très facile, très bonne puissance !
Pour ma part je l'aie mis avec 6 Haut parleur de 250watt de chez JVC. Et deux petits sobwoofer de 10 pouce 100watt le son est vraiment excellent pour ma terrasse c'est bien mieux que je ne pensais !
- Patrik Stig LjungdahlReviewed in Sweden on 4 April 2025
5.0 out of 5 stars Simple, small and powerful
Colour Name: BlackVerified PurchaseI love this little well sounded bastard!
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Cliente AmazonReviewed in Spain on 16 August 2022
5.0 out of 5 stars Grandísima relación calidad/precio
Colour Name: BlackVerified PurchaseEstaba buscando un miniamplificador para usarlo en el salón de casa con unos altavoces que también he pedido en Amazon (aún no me ha llegado). Por lo pronto los estoy probando con unos antiguos altavoces Jensen y el resultado es espectacular. Tiene unos agudos muy claros y una buena separación entre medios y bajos. Me falta probar un subwoofer (este dispositivo tiene la peculiaridad de soportar subwoofer activos y pasivos).
Muy contento con la compra. Lo recomiendo.
Cliente AmazonGrandísima relación calidad/precio
Reviewed in Spain on 16 August 2022
Muy contento con la compra. Lo recomiendo.
Images in this review