Product details

  • Fosi Audio BL20A is a powerful Bluetooth 5.0 HiFi stereo amplifier with AUX pre-output, which can be used as a pre-amplifier. Design Treble & Bass control and remote control to meet your more needs.

  • The BL20A power amplifier supports AUX/U-Disk/Bluetooth input, suitable for most home passive speakers. Using two low-distortion TPA3116 high-performance chips to display ultra-high-definition sound quality.

  • Let's join the audiophile’s music journey with Fosi Audio BL20A Amp!



Specifications

Specifications Details
Model BL20A
Chip Set TPA3116*2
Output Power 100W x 2
Terminating Impedance 2-8Ω
Input Mode Bluetooth, AUX, U-disk
Output Mode Speaker’s Output + 3.5MM AUX Pre-out
Frequency Range 15Hz-20kHz (±1 dB)
THD ≤0.001%
SNR ≥92dB
Input Sensitivity ≤500mV
Support Format MP3/WMA/APE/ FLAC/WAV
U-Disk Capacity MAX 32GB
Bluetooth Transmission Distance Up to 164ft/50m
Device Dimension 3.54×4.72×1.18 inches
Product Weight 0.71lb/323g
DC Input Range 12-24V
Power Supply 24V 4.5A


What‘s in the box?

Item Quantity
BL20A Bluetooth Amplifier x 1
Remote Control x 1
24V 4.5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1

We will send the correct plug type according to destination Country

 

You can also check our BL20C 160W x2 Bluetooth 2.1 CH Amplifier.

FAQs

Please read our FAQs page to find out more.

How to: Choose the right banana plug?
  • Closed Screw Type. All Fosi amplifiers use standard-sized speaker terminals (4mm pins).
  • Easy to wire up and solidly connect to amplifier and passive speaker.
  • If they do not fit, use a little force to tighten the plugs.
  • Fosi Audio Banana Plugs (Copper, Silver/Gold Plated): http://bit.ly/40Djq0U, https://bit.ly/3MkPL8t
  • Please watch tutorial videos: https://youtu.be/6pYhoqDlvNw / https://youtu.be/RGvBgGAwS9k
How to Diagnose Power Supply Failure?
  • The following situations may cause this issue
  • Case 1: The LED on the power supply does not light up; Case 2: Amp/Preamp does not turn on; Case 3: When plugged into the Amp, both light on the amp & power supply start blinking; Case 4: Amp/Preamp make noise; Case 5: Sound shuts off by itself
  • Possible solution
  • Check if the power supply is illuminated when plugged into AC by itself.

    Plug power supply into a different socket.

    Test the adapter with a meter.

    Try a different power supply (within a range of DC input).

    Test the included power supply on other electrical equipment.

    Please watch the tutorial video by clicking on the link provided. https://youtu.be/yCjygS03zTE
What is a GaN?
  • The GaN supply has a power output of 240W.
  • Offers overload and over-temperature protection.
  • The 48V 5A GaN power supply is also available on Amazon.

Didn’t find your answer?

Don't hestitate to contact us

  • 5 stars: 30 (88%)
  • 4 stars: 2 (6%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 2 (6%)
J
John Philipsson
Great!

All great !!

J
John Philipsson
Great!

All great !!

c
chuck n.
Never received the unit

I still have not received the unit I ordered. I have seen the delivery notifications and the supposed delivery pictures, but never have seen the package and had the opportunity to open it and use the amp. HELP!

G
Gregory Quintana
rate

Add remote control on more of you products.

G
Gregory Quintana
rate

Add remote control on more of you products.

M
Mitch Jones
Great small amplifier

I am using the BL20A to play music files off a USB flash drive and it has worked flawlessly. Easy to use and great quality for a small, affordable amplifier.

M
Mitch
Great small amplifier

I am using the BL20A to play music files off a USB flash drive and it has worked flawlessly. Easy to use and great quality for a small, affordable amplifier.

S
Scott Paramore
Great little amo

Lots of power for a small amp

S
Scott Paramore
Great little amo

Lots of power for a small amp

J
Jordi
Impresionant

Molt bon so per un equip tan petit i a un preu tan baix.Tinc uns altaveus antics pero molt bons i volia un amplificador amb bluetooth per seguir utilitsant los.El resultat es espectacular.

J
Jordi
Impresionant

Molt bon so per un equip tan petit i a un preu tan baix.Tinc uns altaveus antics pero molt bons i volia un amplificador amb bluetooth per seguir utilitsant los.El resultat es espectacular.

A
Anthony Wall
Impressed

Id recently changed speakers from a pair of Wharfedale Diamond 11.2 to A set of Wharfedale Diamond 12.2 plus centre speaker. The 11 series are good and my pair were immaculate and didn't want to get rid of them so put them In the bedroom. I didn't want a full size amp due to space so looked online at various mini amps, looked at numerous forums and Fosi always seemed to be mentioned. I must admit I was a bit dubious buying the amp due to it being chinese and was concerned about build quality. However I took the plunge and was somewhat surprised when it arrived. The first shock was the size, I mean it's tiny. Build quality is very good. Sound quality is very impressive for a piece of kit that's so small and sub £60. If you crank the volume right up it does tend to distort slightly in the low bass range but as this is a bedroom speaker set its mainly som chilled jazz or blues that's being listened to, not the thrash metal on the main set in the front room. The remote is a bit on the crap side, you have to be directly in front for it to work but what do you expect for so little cost. Overall however I can't really fault the whole package.

A
Anthony Wall
Impressed

Id recently changed speakers from a pair of Wharfedale Diamond 11.2 to A set of Wharfedale Diamond 12.2 plus centre speaker. The 11 series are good and my pair were immaculate and didn't want to get rid of them so put them In the bedroom. I didn't want a full size amp due to space so looked online at various mini amps, looked at numerous forums and Fosi always seemed to be mentioned. I must admit I was a bit dubious buying the amp due to it being chinese and was concerned about build quality. However I took the plunge and was somewhat surprised when it arrived. The first shock was the size, I mean it's tiny. Build quality is very good. Sound quality is very impressive for a piece of kit that's so small and sub ��60. If you crank the volume right up it does tend to distort slightly in the low bass range but as this is a bedroom speaker set its mainly som chilled jazz or blues that's being listened to, not the thrash metal on the main set in the front room. The remote is a bit on the crap side, you have to be directly in front for it to work but what do you expect for so little cost. Overall however I can't really fault the whole package.

E
Edwin Woods
Spectacular

Work spectacular! Purchased this item to power up speakers in my wood shop. Wanted more sound than a portable blue tooth speaker. Set up was easy and simple. The remote makes it much easier to operate. The sound quality is also spectacular coming from an old pair of Polk Audio speakers. Very happy with my decision to purchase this product.

E
Edwin Woods
Spectacular

Work spectacular! Purchased this item to power up speakers in my wood shop. Wanted more sound than a portable blue tooth speaker. Set up was easy and simple. The remote makes it much easier to operate. The sound quality is also spectacular coming from an old pair of Polk Audio speakers. Very happy with my decision to purchase this product.

R
Raj Kishor
Amplifier is powerful

Amplifier has good potential and powerful but some cons are there such as on off switch and heat issue after some time of use otherwise amplifier is good enough for good bass

R
Raj Kishor
Amplifier is powerful

Amplifier has good potential and powerful but some cons are there such as on off switch and heat issue after some time of use otherwise amplifier is good enough for good bass

M
Mohamad Nabil Hijazi
Good Product

Good product for my application. I hope some time to upgrade the BL20A to have screen for track indication, and output LEDs and volume indication to 100% suit my application. I am Mohamad Nabil Hijazi, bought so far 10 units and using it for electromagnetic coils

M
Mohamad Nabil Hijazi
Good Product

Good product for my application. I hope some time to upgrade the BL20A to have screen for track indication, and output LEDs and volume indication to 100% suit my application. I am Mohamad Nabil Hijazi, bought so far 10 units and using it for electromagnetic coils

S
Stouf
Mauvais son

branché sur 2 enceintes cabasse, le son est médiocre!

G
Gillad Ben Harosh
Value for money very good

Value for money very good

G
Gillad Ben Harosh
Value for money very good

Value for money very good

E
Eitan Goodman
Very happy with the BL20a

Just received the BL20A and am extremely happy with the product. This is my second Fosi amplifier, And I love that it shows up with its own name among my Bluetooth devices so as to not confuse itself with other Fosi products. The remote control is a nice touch as well. And the Bluetooth stays on and ready as long as the amp is plugged in, which makes for very convenient pairing whenever you want to play music. The sound quality delivered through my Dayton bookshelf speakers needed a bit of adjustment at first - but that’s kind of the idea with the BL20a model, it’s more for the control freaks. Though even if you’re not well-versed in sound, it’s very easy to adjust the dials to reach the signature you’re looking for. Now I’m enjoying crisp, balanced sound with good punch. Will definitely recommend this product based on my experience so far.

E
Eitan Goodman
Very happy with the BL20a

Just received the BL20A and am extremely happy with the product. This is my second Fosi amplifier, And I love that it shows up with its own name among my Bluetooth devices so as to not confuse itself with other Fosi products. The remote control is a nice touch as well. And the Bluetooth stays on and ready as long as the amp is plugged in, which makes for very convenient pairing whenever you want to play music. The sound quality delivered through my Dayton bookshelf speakers needed a bit of adjustment at first - but that��s kind of the idea with the BL20a model, it��s more for the control freaks. Though even if you��re not well-versed in sound, it��s very easy to adjust the dials to reach the signature you��re looking for. Now I��m enjoying crisp, balanced sound with good punch. Will definitely recommend this product based on my experience so far.

M
M KRISHNA REDDY
excellent

supper product

k
krishna Reddy Mittapalli
excellent

supper product

J
Jared Stein
Love that it has a remote but no RCA in

I really wish this had RCA in, as it’s a great little unit and one of the few that has a remote.

J
Jared Stein
Love that it has a remote but no RCA in

I really wish this had RCA in, as it��s a great little unit and one of the few that has a remote.

J
Jason

Great little amplifier. Using it to push two Klipsch R-50M’s and a Klipsch R-120SW!

J
Jason Creel

Great little amplifier. Using it to push two Klipsch R-50M��s and a Klipsch R-120SW!