Upgrade of the Legend! Fosi Audio BT20A Pro Mini Bluetooth Stereo Power Amplifier Introduction

[@yttean98]

Very instructive video, more Chinese product introductory videos should be made this way.

[@jasonmclaughlin2155]

The BT10A from 5 years ago outputs so much more volume with bluetooth. Had to send it back

[@sergiosantillan4792]

Fosi excelente compañía que escucha a sus clientes. !!Felicidades!! Ah, y para cuando un amplificador como el tb20apro con control remoto en su volumen? Please 🙏🙏👍

[@fosiaudio]

😁 Definitivamente lo mantendremos informado sobre esta característica del BT20A PRO. Si tiene más ideas o comentarios, no dude en compartirlos con nosotros.

[@OnurKula]

Thanks for answers...

[@bennip.5009]

Hello, I use the bt30 pro and am very happy with the performance, what I miss is a digital input and a digital crossover software on board, bluetooth aptx would also be good and wifi, the switch could be a little more stable, and even higher quality components for even better sound

[@Coltan999]

And what would you like to pay for it?

[@WatchOUT316]

It's a good class d mini amp but the addition of aptx hd n ldac would have been amazing as the primary input by default is bluetooth.

[@jimfarrell4635]

Just for information. If you are considering upgrading the op amps, you will need two dual op amps. Burson V6 Vivid dual op amps work well but are too tall for the case, so the case will need to be modified to accommodate their height.

[@gpamanado1386]

Had a plan to get burson but yeah the red things are too high.

[@malysceptyk8534]

Great, now we are waiting for "older brother" of Fosi T10 with TPA3255 (more power) and working TIDAL connect ;-)

[@fosiaudio]

Yah, actually we are doing something on it.😎

[@iblesbosuok]

Pin 32 and pin 35 of the TPA3255 which have a cross section size of 0.27mm×0.15mm each has the potential to carry a current of 8.87A each. In my opinion, that's the weakness of the TPA3255 and the stuffs that apply it, including Fosi bt20apro. Thank you

[@fosiaudio]

Thanks to your point of view. So far the TPA3255 chips are working very well in our amplifiers. We believe it is reliable enough.😁

[@iblesbosuok]

@@fosiaudio i have had bad experience with 3255. Those pins melt up.

[@franckraymond6245]

​@@iblesbosuok bonjour, problème avec quelles enceintes et quel niveau de sonore.please✋

[@iblesbosuok]

@@franckraymond6245 problems regarding the toughness of the device

[@franckraymond6245]

@@iblesbosuok ok pour l'info👍 personnellement j'utilise 2 ampli CROWN XLS 2502 avec des enceintes 4ohms 94db: c'est parfait mais beaucoup, beaucoup plus cher😉

[@mtayfur83]

I own a Fosi Audio BT20A PRO and a Fosi Audio T20X Amplifier. I use these amplifiers with my Dali Spektor 2 and Dali Oberon 1 bookshelf speakers. Pairing T20X with Oberon 1 gives very successful results. Spektor 2 pairing with BT20A PRO provides a good experience. However, when I compare BT20A PRO with T20X in terms of volume, the T20X volume control button is at 10 o'clock, while the BT20 PRO volume control button is only equal at 2 o'clock. I wonder what causes this difference in distance? There is an adapter in the box that can output 32V 5A. It is written in some forums that the real power of the product can be felt with the 48V 5A adapter. Why does it come with 32V and not 48V? Also, when I compare it with the T20X, which has 200W power, I think that the BT20A PRO is not actually 300W, as stated. Am I wrong?

[@heromail2903]

Thanks for the video, very informative. Regards from Jakarta

[@jayantadakable]

Haven’t it been a good idea if an 'Optical Toslink' connections too existed along with the RCA Line in?

[@sanfroby]

Fantastic 😍

[@christiantolosano1941]

hi & thanks for the video !!! question : can we bridge 2 x BT20A Pro to get more power & use 2 x 8homs speakers + an active subwoofer & plug a cd player + a turntable on both the RCA on each amp ? and how to do it please . thanks in advance for your answer.

[@fosiaudio]

Hello friend, if you bridge 2 BT20A Pros via the pre-out port, you cannot get more power actually. According to your case, BT20A Pro is not a very appropriate solution. Probably you need an amp with two inputs to swtich and a pre-out port for connecting an active subwoofer.

[@ianmacfarlane9240]

I love the sound, just wish there was a headphone jack and Bluetooth switch, the need to disconnect devices or clear is a pain. My turntable for example that has a Bluetooth mode has no way to forget the connection.

[@fosiaudio]

We will try to add a headphone jack and Bluetooth switch. To disconnect the connection with your turntable, simply long-press the volume button for 5 seconds.

[@kaynealvaro1528]

How do I connect it to turntable

[@dgdave2673]

Take these reviews with a big spoon of salt. I have this little ChiFi amp, it’s wonderful for what it is for desktop listening, casual game room setup etc. but let me be clear, it’s no match for even a entry level, but well built, well priced offerings from Cambridge or Emotiva etc. The Emotiva Mini X-A100 that I also own beats the snot out of this little bugger in terms of superb midrange weight, bass depth and tightness and well resolved treble and separation. But for $80, this BT20a Pro does hold a surprise or two on how well it still can drive medium to large speakers. Anything upto 11 O’clock position sounds good. Beyond that it loses its composure, but it’s already pretty loud 90db by then. Try this for fun and you may find a use case.

[@barsovabs4951]

Wondering if can they support genelec 8010a power speakers

[@marcochilu]

Can I connect only passive speakers ?

[@nishantranabliss]

Hi friend thanks for the video. Is the pre out on Bt20a pro variable? Can it be controlled through volume knob ?

[@fosiaudio]

Yes, the "Pre Out" on the BT20A Pro is a variable output, not a fixed output.

[@oliverosrecki7421]

Can you tell me, what is the difference between the Fossi Device, V3, Za3, and devices like the QUAD 405, 44 FM4? Is it better, that is, better quality Quad devices that I mentioned or FOSI V3 or Za3? 

[@Shiva-sd6tm]

What Bluetooth codecs are supported ? I see that it is connecting with SBC codec and not even AAC

[@rahulsan24]

@fosiaudio please help answer my query. I want to use only Bluetooth and preout of bt20a pro and I have not connected speaker cables, in this case, does bt20a pro consume same energy in purely preamp mode? I have both bt20a pro and v3.

[@OnurKula]

Can we upgrade its Bluetooth to aptx?

[@andyfischer64]

I desire increasing the bt20 Pro to the claimed wattage of 600 watts. I understand the op amps must be replaced per the comments here. What other changes must be done? Thank you

[@fosiaudio]

You can upgrade the power supply to increase the power output.

[@OnurKula]

Which opamps for audiophiles?

[@franckraymond6245]

Super vidéo 👍❤

[@nishantranabliss]

The pre out in it variable can be controlled through volume of yhe amplifier ?

[@fosiaudio]

Yes, the pre-out is controlled by the volume setting.

[@nishantranabliss]

@@fosiaudio thanks for responding

[@DisgustingJustinAD]

Will it be possible for me to connect two separate Echo Dots via Bluetooth directly to this receiver & then use the receiver to connect to my PC?

[@fosiaudio]

You can connect only one Echo Dot via Bluetooth at a time, and then you can hook up the speakers.

[@ginkings1124]

How can i connect my PreSonus eris e3.5 to Fosi Audio BT20A Pro? TIA

[@tamersosman]

Can it get connected to honor 50 android phone by usb c otg cable?

[@sergiosantillan4792]

Ayuda desde México!! Puedo conectar esté Fosi a un amplificador de poder externo clase AB Sony que tiene RCA plugs? Puede funcionar esté Fosi tb20a pro también como premplificador estéreo? Y como lo hago por favor 🙏

[@fosiaudio]

Sí, funciona, conéctelo desde la salida previa (un solo cable de 3,5 mm) a la entrada RCA en Sony Amp, si apaga el BT20A PRO y pasará la señal al amplificador de potencia.

[@wildarian3315]

Can anyone tell me well the BT20APro will run from an 18vDC power source?

[@stevenvogelaar8075]

Hai, Is there a way to kill the bluetooth channel? I wouldn't like someone hijacking the amplifier when I'm listening to music. And pressing the volumeknob for 5seconds after the amplifier was hijacked won't do.

[@fosiaudio]

It is unable to disable bluetooth function, please keep your device connect to it so that others won't search for them, take the antenna off, and use the metal shell to cover the amplifier to shorten the connection distance. Long press volume button 5s to disconnect the Bluetooth connection with a device.

[@grungemax]

Is there a new version of the tube amp as well?

[@fosiaudio]

Yes, we have the plan. Please join our Facebook community to get updates on our new products. facebook.com/groups/fosiaudiocommunity

[@mrsunshine63755]

nice

[@maroof8905]

Nice! ❤ Can we buy in India?🇮🇳

[@fosiaudio]

Sure, you can refer to our Fosi Audio shop bit.ly/fsbt20apro

[@mdkaisar6699]

I want to get this amplifier how can I get it

[@fosiaudio]

You could get it from our Fosi Audio official website or Amazon.

[@superblondmale]

can the tone control be disabled? This feature is labeled as "direct source" afaik.

[@fosiaudio]

Please set the Bass and Treble controls to the 12 o'clock position, without any boost or cut.

[@nazarcm1754]

fosi amplifier have pop noise???.

[@taron.y]

Sub? Do they make a 2.1

[@stoilstoilov5572]

Hello, I have bought one standard combination of 1 x FOSI BT20A PRO with 1x Power supply 32V 5A. Also I have the possibility to use JBL STAGE A130 pair bookshelf speakers, 6 oms; It is specified: Speakers maximum Power - 125 Watts but for everyone or both of them is not clear Also: Recommended Amplifier Power: 20 - 125W; Frequency Response: 55Hz - 40kHz. Is it possible to use FOSI BT20A PRO with these loudspeakers and if not which loudspeakers, not very expensive, are preferable. Thanks from BG.

[@fosiaudio]

Yes, BT20A PRO is compatible with JBL STAGE A130 speakers.

[@stoilstoilov5572]

@@fosiaudio Thank you very much! Hope to enjoy a musical pleasure with Your product! Best wishes from BG!

[@82ivaylo]

I have both amplifiers, the bt20a and bt20a pro. When i set the volume knob to 12 o clock position on both amplifiers the bt20a is more powerful, louder than bt20a pro. On paper the pro version is more powerful, but in real test it is not.

[@fosiaudio]

The BT20A Pro features a built-in logarithmic taper A Pot, which sets it apart from the regular BT20A that uses "Type B." As a result, the BT20A Pro delivers more power at higher volume levels. To experience the difference, I recommend increasing the volume on both the amplifier and the audio source then comparing the two models.

[@82ivaylo]

@@fosiaudio Thanks for the replay. I didn't increase the volume pot ovear 12 o clock until now.

[@fosiaudio]

@@82ivaylo Please give it a try, it is the characteries of pot.

[@82ivaylo]

@@fosiaudio I did this experiment. So the BT20A pro has more power abd sounds better than BT20A. Thank you for your advice.

[@macoygunida]

Any dual op amp compatible with this?

[@fosiaudio]

Yes, most 8-pin dual op-amps are compatible, such as the Sparkos SS3602, MUSE02, etc

[@macoygunida]

@@fosiaudio which one do you recommend or have tested yourself? I just got my bt30d pro and I’m in love with this thing, it is just amazingly amazing. And bt20a pro is on it’s way as well. Can’t wait!

[@cireniets1972]

Can I use op amp 1622 on bt20a pro?

[@fosiaudio]

It should work in theory, but it depends on the actual results.

[@FatihaIslam-t5t]

আসসালামু আলাইকুম ভাইয়া এটা কিভাবে আমি কিনবো

[@thiruvenghadamponnusamy1255]

Pls.what is the rate?

[@fosiaudio]

Do you mean the power rating or output power of this amplifier? If yes, the power rating is 300W X 2(4 ohms)

[@FatihaIslam-t5t]

এটার দাম কত

[@sunitbelekar9131]

Jabree

[@jjjilani9634]

No optical! No USB C !

[@landosazo7506]

stop it already...most class d amps have no heft or finesse like well made class a/ab amps but fo the price they are good garage/shop amps while you are fixing things around the house