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Fosi Audio BT30D Bluetooth 5.0 high quality Stereo online sale Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer online

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Fosi Audio BT30D Bluetooth 5.0 high quality Stereo online sale Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer online__left


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Our Story

Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW!

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: BT30D Amp, Power Supply, User Manual

  • 2 Channel Power Amp: BT10A, BT20A, TB10A, V1.0G, TDA7498E, ZK-1002, ZK-502T...
  • 2.1 Channel Power Amp: BT30A, BT30D, BL20C, ZK-TB21
  • DAC: Q4, Q5, DA2120A, DA2120C, HD3, K3, E10
  • Subwoofer Amp: TP-01, TP-02, M02, M03
  • Phono Preamp: Box X2, BOX X1; Tube Preamp: P1
  • Tube Headphone Amplifier: T20, P2
  • Others: 5654 tube, Power Adapter, Brush, Audio Cables, GH5000 Gaming Headset


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.

BT30D BT30A M03 DA2120A BOX X4 BT30D-S
Type 2.1 CH Amp 2.1 CH Amp Subwoofer Amp/Mono Amp DAC Amp Phono Preamp/Headphone Amp 2.1 CH Amp
Input Bluetooth + RCA Bluetooth + RCA RCA Bluetooth+ AUX + USB + Optical + Coaxial MM Turntable+3.5mm AUX Bluetooth + RCA
Output Passive (Speakers+Subwoofer) +Powered Subwoofer Passive (Speakers+Subwoofer) Passive (Speakers+Subwoofer)+Powered Subwoofer Passive Speakers + Powered Subwoofer Powered Speakers +Headphone Passive (Speakers+Subwoofer) +Powered Subwoofer
THD ≤ 0.04% ≤ 0.04% ≤ 0.03% ≤ 0.01% ≤ 0.1% ≤ 0.04%
SNR ≥ 98dB ≥ 98dB ≥ 106dB ≥ 105dB ≥ 70dB ≥ 98dB
Terminating Impedance 2-8Ohm 2-8Ohm 4-8Ohm 2-8Ohm - 2-8Ohm
Power Adapter 24V/4.5A 24V/4.5A 32V/5A 24V/4.5A 12V/1.5A 24V/4.5A
Work Voltage AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V
MAX Power Output 50 wattx2+100 watt 50 wattx2+100 watt 300 watt 50 wattx2 - 50 wattx2+100 watt

Features & details

Features

  • 2021 NEW MODEL: The updated version for BT30C. Join the audiophile muisc journey with Fosi Audio BT30D.
  • 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 home passive speakers, 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 18-month warranty, and friendly customer service.

Product information

Product Warranty: For warranty information about this product, please click here
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Product guides and documents

Comparison Chart (PDF)
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Customer Questions

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Q: What is the subwoofer frequency crossed at?

A: According to the Fosi site, the ''sub freq'' knob does exactly what you would expect, acts a…

B-rad | 11 months ago

Q: How would this work if powered off a 12 v battery in and RV?

A: It would work, but since the power supply for full power rating is 24v, you’d get a lower …

Fladelerium | 6 months ago

Q: I have wireless speaker near my chair if I put this on transmitter will it amplify out pu…

A: This Fosi Audio amp is designed to receive a Bluetooth signal, and needs that signal to am…

Ron N. | 3 years ago

Q: How does the user switch from rca input to bluetooth input? or does it somehow auto-switc…

A: If you connect from a BT transmitter (e.g. phone) it will play BT. If you then want to sw…

Jeffrey R. Webb | 7 months ago

Customer reviews

4.5 out of 54.5 out of 5
620 global ratings

Top reviews from the United States

benjammin149
4.0 out of 5 starsVerified Purchase
BT20A vs BT30A
Reviewed in the United States on April 5, 2019
Both are great units! So far, I prefer the BT20A unless you need to connect a subwoofer. Both are built well and work as intended. See the video for a comparison of these two units.
32 people found this helpful
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Julian
5.0 out of 5 starsVerified Purchase
Small & Powerful!
Reviewed in the United States on June 26, 2019
I picked up the 2.1 version of this receiver for my in ceiling speakers in my basement. They speakers are two 100watt speakers with 1 50 - 300 watt sub. I was a bit worried that this wouldn''t pack enough punch for my application; but boy was i wrong. Pros -... See more
I picked up the 2.1 version of this receiver for my in ceiling speakers in my basement. They speakers are two 100watt speakers with 1 50 - 300 watt sub. I was a bit worried that this wouldn''t pack enough punch for my application; but boy was i wrong.

Pros -
Smaller than you would think
This thing has some weight to it and feels nice.
The knobs and switches have a great resistance to them
Audio is clear with no crackling or white noise
Bluetooth set up requires no password and is very easy to set up

(small) Cons:
If you have regular speaker wire its going to be extremely annoying to wire these up given the size of the unit.
toggling between bluetooth and line-in requires you to toggle a switch in the back of the unit. Theres no smart switching based on audio received.
No remote (but really, who uses these things!?). You''ll need to make some time to find your max volume and then adjust your media device accordingly.

Over all i''m very happy with my choice and wouldn''t hesitate to pick one of these up again!
19 people found this helpful
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David
5.0 out of 5 starsVerified Purchase
Sounds good, looks good, feels good but get a decent power supply
Reviewed in the United States on January 27, 2021
I was pleasantly surprised at how loud and good this sounds. My old onkyo is louder but I never use it at that volume as I''d like my ears not to ring. This thing is still quite loud. Louder than I need. It has good sound quality. The bass on the main speakers is a little... See more
I was pleasantly surprised at how loud and good this sounds. My old onkyo is louder but I never use it at that volume as I''d like my ears not to ring. This thing is still quite loud. Louder than I need. It has good sound quality. The bass on the main speakers is a little less than what my onkyo is but not much. The subwoofer fills that in though with a little adjustment. On the flip side of the coin it''s got more treble. It''s very clear and sounds great on my polk audio speakers and sub. It has the controls.that I like on my sound equipment. A nice plus is the sub frequency adjustment on this thing means I don''t have crawl on the floor to adjust anything on my subwoofer to balance it all out. It works with both powered and passive subs. Seems well built, knobs feel nice and it''s small. The onkyo I had was just.overkill and too big for my living room. Pretty happy with it. The only con is the power supply died. Not completely, it got quieter and quieter. New supply from an old laptop with an 8 Amp rating workes great.
7 people found this helpful
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502PWRD
5.0 out of 5 starsVerified Purchase
5 Stars with one Caveat
Reviewed in the United States on May 19, 2021
Excellent sounding amp with an appropriate pair of bookshelf speakers. A powered sub really helps the sound although there is an internal amp channel for a small sub. I’ve had the best results with a larger 10-12” powered sub. Bluetooth connectivity has been flawless! I... See more
Excellent sounding amp with an appropriate pair of bookshelf speakers. A powered sub really helps the sound although there is an internal amp channel for a small sub. I’ve had the best results with a larger 10-12” powered sub. Bluetooth connectivity has been flawless! I really am impressed with this amp and no longer even bother with a receiver.

The caveat is that the first unit I bought, and fell in love with, has in my opinion a much stronger output. It’s really loud and punchy! The other 2 units are still good but just don’t hit like the first. I’ve done A,B, and C side-by-side comparisons to confirm this. I’m not sure if Fosi detuned the output a bit but it’s noticeable. Just my observation.... hope the review helps!
6 people found this helpful
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Jeff S.
5.0 out of 5 starsVerified Purchase
Fantastic Quality
Reviewed in the United States on November 20, 2020
This little receiver performs exactly as you''d hope. I use this for my office desktop setup, in which I connect two 50W Sony bookshelf speakers and a Monoprice 8" powered 60W subwoofer. Piggy-backing on a (finally) reliable and super quick Bluetooth 5.0, device connection... See more
This little receiver performs exactly as you''d hope. I use this for my office desktop setup, in which I connect two 50W Sony bookshelf speakers and a Monoprice 8" powered 60W subwoofer. Piggy-backing on a (finally) reliable and super quick Bluetooth 5.0, device connection is solid at all usable ranges (I can walk to the other side of my house and maintain connection, not that I''d ever need to). EQ knobs are a godsend (not common in other Bluetooth receivers), as well as being able to tweak subwoofer parameters (Volume and Freq cutoff) from on the desk rather than bending over and reaching behind the sub. As always, there is a little white noise in the speakers when the system is in use (which is more noticeable in my setup as the speakers are about 3ft away from me), and I''d love to find a way to reduce that. If you have LOTS of noise in your speakers, make sure to double check that you are not creating a ground loop between the receiver and subwoofer (plug both into the same power strip) and that speaker wires aren''t running alongside powered AC lines. This guy was the perfect solution for my office audio workflow!
5 people found this helpful
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PJ
5.0 out of 5 starsVerified Purchase
Excellent Value Bluetooth/Aux Mini-Amp for 2.1 Channel Set-Up (works with powered sub-woofers)
Reviewed in the United States on August 29, 2019
Needed a 2nd system in our office for computer audio and Bluetooth devices, separate from the home theater already in place. Connected 2 ceiling mounted Orb Audio speakers and a Polk Audio powered sub-woofer (using RCA connections). Once the bass balance is dialed in... See more
Needed a 2nd system in our office for computer audio and Bluetooth devices, separate from the home theater already in place. Connected 2 ceiling mounted Orb Audio speakers and a Polk Audio powered sub-woofer (using RCA connections). Once the bass balance is dialed in between the Fosi Amp and the sub-woofer amp, and both the treble and bass levels are dialed in for the complete system of speakers, the sound is excellent. The Bluetooth signal is great. The only change I would make would be to relocate the Bluetooth/Aux switch from the rear of the amp to the front for easier access when switching between Aux and Bluetooth devices, but this is not enough to reduce the overall rating.
8 people found this helpful
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Mr. Gadget
5.0 out of 5 starsVerified Purchase
Seems to suit it''s purpose
Reviewed in the United States on April 23, 2021
I''ve only used it a few times so far, but it''s seems to meet my expectations (I''m sure nobody expects it to equal a Carver amp!). I don''t notice any stray humming, hissing, or distortion sounds. The ability to control the subwoofer independently from the satellites is... See more
I''ve only used it a few times so far, but it''s seems to meet my expectations (I''m sure nobody expects it to equal a Carver amp!). I don''t notice any stray humming, hissing, or distortion sounds. The ability to control the subwoofer independently from the satellites is great (I like deep base, but not overpowering / booming bass). The Bluetooth must be manually connected each time by opening the phone''s Bluetooth settings and selecting the Fosi. I.E. It doesn''t re-connect automatically to a previously paired device. I didn''t see a way to setup a PIN to prevent stray connections to it, but assuming you turn it off when not in use, that shouldn''t be a problem. I was concerned that a stray Bluetooth connection request might "steal" an active connection, but that doesn''t seem to be a problem. I tried turning it up loud, whereupon it cut-out till I turned it down. I assume it''s a protection circuit. It wasn''t terribly loud when it cut-out, so keep your expectations reasonable and you''ll be happy. One caveat - the banana sockets are quite close together, and since banana plugs can wobble a bit, I was concerned they might bump each other and create a short circuit (my banana plugs have exposed metal ... stupid design?!). I slid a popsicle stick between the red and black plugs so they can''t touch. Just a caveat.
3 people found this helpful
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Travis M.
2.0 out of 5 starsVerified Purchase
Loud high-freq hiss and bass output defective [BT30D]
Reviewed in the United States on January 29, 2021
I really wanted to like this -- so many other people have had good experiences -- but I must''ve gotten a lemon. First, the left and right channels both have a loud hiss in the treble band. I''ve verified that it''s not coming from my audio source, but it''s the amplifier... See more
I really wanted to like this -- so many other people have had good experiences -- but I must''ve gotten a lemon. First, the left and right channels both have a loud hiss in the treble band. I''ve verified that it''s not coming from my audio source, but it''s the amplifier itself. Second, the amp-driven subwoofer output (the banana jacks for passive sub, not the line-level RCA out for a powered sub) can only drive ~3.6 milliwatts to my 4 ohm subwoofer, not 100 watts. I tried contacting Fosi but didn''t get a response.

The upshot is that the L/R channels drive plenty of power, the build quality feels solid, and the internal crossover does its job. I didn''t get around to trying the Bluetooth capability.
4 people found this helpful
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Top reviews from other countries

M. G. Sampson
4.0 out of 5 starsVerified Purchase
Remarkable Sounding little unit but flawed security on bluetooth connection.
Reviewed in the United Kingdom on March 1, 2021
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 using a good source like my Cambridge CXU into the phono''s and playing CD''s this unit provides a surprisingly wide spacious sound...See more
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 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.
4 people found this helpful
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Amazon Kunde
5.0 out of 5 starsVerified Purchase
Excellent quality, at least in the first days
Reviewed in the United Kingdom on December 21, 2020
The amplifier reached me very quickly. It was easy to connect the wires of my 20+ years old passive speakers and my music centre (bad sound) with RCA cables to this amplifier. The system worked immediately. I am not an expert of music or sound, but it seems that my music...See more
The amplifier reached me very quickly. It was easy to connect the wires of my 20+ years old passive speakers and my music centre (bad sound) with RCA cables to this amplifier. The system worked immediately. I am not an expert of music or sound, but it seems that my music centre has never made better sound. I am very satisfied. Have not tested subwoofer yet. Bluetooth works fine, without problems. I can sit at least 5 meters away with a smartphone or laptop and play music files or Youtube. Villu
3 people found this helpful
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mervyn yardley
5.0 out of 5 starsVerified Purchase
This Amp Is The Champ
Reviewed in the United Kingdom on September 30, 2021
Forget about your big bulky amplifier, you know, the one that takes up a lot of space, i too had one, but now i''ve got this Fosi amp, smaller that a bluray disc box, but it has 100w per channel, so how many 200watt amps have you seen that is smaller than a bluray box?, of...See more
Forget about your big bulky amplifier, you know, the one that takes up a lot of space, i too had one, but now i''ve got this Fosi amp, smaller that a bluray disc box, but it has 100w per channel, so how many 200watt amps have you seen that is smaller than a bluray box?, of course your thinking, yeah but it might sound horrible.....i too thought that, until i tried it out, this amp for it''s size is exceptional, the sound is clear, and you get an input for a passive subwoofer, also it has bluetooth, i used a Sony amp for my music, but now i use this Fosi, okay it''s not remote control, but''s not a problem for me, when i first saw this i laughed, because of it''s size, but now Fosi has the last laugh.
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C. C. Gallen
4.0 out of 5 starsVerified Purchase
Just what I wanted
Reviewed in the United Kingdom on May 7, 2019
I had a spare pair of speakers I wanted to add to my TV to comensate for the poor built in sound. I chose this item because it was reasonably priced and powerful enough to meet my requirments. Banana fittings were also a positive comapred to similar items. I am very pleased...See more
I had a spare pair of speakers I wanted to add to my TV to comensate for the poor built in sound. I chose this item because it was reasonably priced and powerful enough to meet my requirments. Banana fittings were also a positive comapred to similar items. I am very pleased with what I bought. It is a nice small but powerful unit which has improved my audio visual appreciation considerably. I have not tried the bluetooth but would recommend this produce as a good priced amp.
3 people found this helpful
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Mr. T. Murphy
5.0 out of 5 starsVerified Purchase
GREAT SOUND, GREAT BUILD, AND QUALITY.
Reviewed in the United Kingdom on February 8, 2021
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. 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...See more
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. 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.
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