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expiredHonestPicture193 posted Apr 10, 2023 5:04 PM

Fosi Audio BT20A Pro Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

$80

$100

20% off
+ Free Shippingat Amazon
97 Comments
40.1K Views
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Deal Details
Fosi Audio via Amazon has Fosi Audio BT20A Pro Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver (TPA3255) for $79.99 after applying promo code 20APROMKT20 at checkout. Shipping is free.

Thanks to Community Member HonestPicture193 for finding this deal.

Includes:
  • 1x BT20A Pro Power Amplifier
  • 1x Bluetooth Antenna
  • 1x 32V 5A Power Adapter
  • 1x AC Cord
  • 1x User Manual
Features:
  • TI TPA3255 Chip Amplifier with 300 Watts x 2 Power Output
  • Bluetooth 5.0 Connectivity
  • MAX Output Power: 300Wx2@4Ω
  • THD: ≤ 0.03%; SNR: ≥108dB
  • Frequency Response rRange: 20Hz-20kHz(±1.2dB)
  • Bluetooth Distance: ≥15m;
  • Bluetooth Transmission Format: SBC/AAC

Editor's Notes

Written by powerfuldoppler | Staff
  • About this product:
    • Rating of 4.6 from over 479 Amazon customer reviews.
  • About this store:
  • Additional note:

Original Post

Written by HonestPicture193
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Fosi Audio via Amazon has Fosi Audio BT20A Pro Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver (TPA3255) for $79.99 after applying promo code 20APROMKT20 at checkout. Shipping is free.

Thanks to Community Member HonestPicture193 for finding this deal.

Includes:
  • 1x BT20A Pro Power Amplifier
  • 1x Bluetooth Antenna
  • 1x 32V 5A Power Adapter
  • 1x AC Cord
  • 1x User Manual
Features:
  • TI TPA3255 Chip Amplifier with 300 Watts x 2 Power Output
  • Bluetooth 5.0 Connectivity
  • MAX Output Power: 300Wx2@4Ω
  • THD: ≤ 0.03%; SNR: ≥108dB
  • Frequency Response rRange: 20Hz-20kHz(±1.2dB)
  • Bluetooth Distance: ≥15m;
  • Bluetooth Transmission Format: SBC/AAC

Editor's Notes

Written by powerfuldoppler | Staff
  • About this product:
    • Rating of 4.6 from over 479 Amazon customer reviews.
  • About this store:
  • Additional note:

Original Post

Written by HonestPicture193

Community Voting

Deal Score
+24
Good Deal
Visit Amazon

Top Comments

john2952
370 Posts
130 Reputation
Me: reads through comments trying to figure out what this is so I can talk myself into buying it because it's a slick deal
xtp
9737 Posts
1344 Reputation
The a07 lowest was $50.

So, this adds, bluetooth and tone control for $30, that's pretty reasonable.

Personally I'd still rather get the a07 as a purist, because you get higher Sinad (signal to noise) without the tone control circuits/ bluetooth chipset. But, for 99% of everyone else who's getting into amps, this makes alot more sense.
CleverRoom6050
2 Posts
10 Reputation
This BT20A Pro's SINAD is the same 83dB as the A07 according to audiosciencereview's measurements, even though it has tone controls and Bluetooth circuit.

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97 Comments

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Apr 10, 2023 6:46 PM
9.7K Comments
Joined Aug 2013
xtpApr 10, 2023 6:46 PM
9,737 Posts

Our community has rated this post as helpful. If you agree, why not thank xtp

The a07 lowest was $50.

So, this adds, bluetooth and tone control for $30, that's pretty reasonable.

Personally I'd still rather get the a07 as a purist, because you get higher Sinad (signal to noise) without the tone control circuits/ bluetooth chipset. But, for 99% of everyone else who's getting into amps, this makes alot more sense.
2
6
Apr 10, 2023 6:56 PM
5.1K Comments
Joined Jul 2004
Parato OptimalApr 10, 2023 6:56 PM
5,117 Posts
Everyone likes the BT10A. I haven't seen any reviews of the BT20A except from Fosi themselves.

The Ayima A07 was $47 on the last Amazon Prime Days.

1
1
Apr 10, 2023 7:04 PM
40 Comments
Joined Jul 2009
CyganApr 10, 2023 7:04 PM
40 Posts
I just saw a review for this earlier today. Good clean power. If you want the full power out of this thing you need to purchase an upgraded power supply.

https://m.youtube.com/watch?v=b1zFuLK655g
1
Pro
Apr 11, 2023 1:17 AM
3.1K Comments
Joined Sep 2016
vid1900
Pro
Apr 11, 2023 1:17 AM
3,128 Posts
https://www.audiosciencereview.com /forum/index.php?threads/fosi-audio-bt20a-pro-amplifier-review.43751/

(like always, remove space in above link to read detailed measurements and review)

Good performing amp for the money

1
2
Apr 11, 2023 2:12 AM
2 Comments
Joined Nov 2022
CleverRoom6050Apr 11, 2023 2:12 AM
2 Posts
Quote from xtp :
The a07 lowest was $50.

So, this adds, bluetooth and tone control for $30, that's pretty reasonable.

Personally I'd still rather get the a07 as a purist, because you get higher Sinad (signal to noise) without the tone control circuits/ bluetooth chipset. But, for 99% of everyone else who's getting into amps, this makes alot more sense.
This BT20A Pro's SINAD is the same 83dB as the A07 according to audiosciencereview's measurements, even though it has tone controls and Bluetooth circuit.
Apr 11, 2023 2:13 AM
2 Comments
Joined Nov 2022
CleverRoom6050Apr 11, 2023 2:13 AM
2 Posts
Quote from vid1900 :
https://www.audiosciencereview.com /forum/index.php?threads/fosi-audio-bt20a-pro-amplifier-review.43751/

(like always, remove space in above link to read detailed measurements and review)

Good performing amp for the money
Very detailed measurements. The SINAD is 83dB, really nice.
Apr 11, 2023 2:48 AM
105 Comments
Joined Dec 2003
trash2931Apr 11, 2023 2:48 AM
105 Posts
"Receiver" doesn't mean what it used to.
4

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Apr 11, 2023 2:49 AM
9.5K Comments
Joined Aug 2018
TodayOnlyApr 11, 2023 2:49 AM
9,544 Posts
can the preout be used for sub?
Apr 11, 2023 2:56 AM
9.7K Comments
Joined Aug 2013
xtpApr 11, 2023 2:56 AM
9,737 Posts
Quote from CleverRoom6050 :
This BT20A Pro's SINAD is the same 83dB as the A07 according to audiosciencereview's measurements, even though it has tone controls and Bluetooth circuit.
This would parallel the aiyima in terms of performance. The tone circuits might still wiff the middle a bit, but as long as it's not damaging sinad, i guess that's ok.

I guess the last part is testing both the 32v and 48v included power supplies from a retail sample and making sure nothing shady's going on there.

On Chi-Fi forums, there's been cases where company sent out "good" power supplies to the reviewer, and cheaper noisy ones in the retail. EEK!
Last edited by xtp April 10, 2023 at 08:01 PM.
1
Pro
Apr 11, 2023 3:02 AM
3.1K Comments
Joined Sep 2016
vid1900
Pro
Apr 11, 2023 3:02 AM
3,128 Posts
Quote from TodayOnly :
can the preout be used for sub?
Yes (but you will need a sub with it's own crossover)
1
Apr 11, 2023 3:06 AM
449 Comments
Joined Apr 2011
AhhkApr 11, 2023 3:06 AM
449 Posts
Quote from trash2931 :
"Receiver" doesn't mean what it used to.
haha..yeah. Kids these days....

I guess it "receives" BT transmissions instead of AM/FM.
2
Apr 11, 2023 3:10 AM
9.7K Comments
Joined Aug 2013
xtpApr 11, 2023 3:10 AM
9,737 Posts
Quote from Ahhk :
haha..yeah. Kids these days....

I guess it "receives" BT transmissions instead of AM/FM.
But how will you listen in on the lot lizards Ahhk
1
4
Apr 11, 2023 7:52 AM
1.3K Comments
Joined Aug 2015
natofrombombatoApr 11, 2023 7:52 AM
1,309 Posts
I like these little amps for computers or whatnot, but they seem like they should all cost around $50. Big receivers are so cheap second hand. A small receiver that can do 15 watts RMS is all I would need. I think that is what a car stereo puts out per channel. The last small receiver I bought was the Dayton dta30hp, but it has since been discontinued.
5
Apr 11, 2023 11:21 AM
3.6K Comments
Joined Oct 2003
onenessApr 11, 2023 11:21 AM
3,594 Posts
I like Fosi stuff, think I'll pick one up
Last edited by oneness April 11, 2023 at 04:46 AM.

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Apr 11, 2023 11:40 AM
3.1K Comments
Joined Jul 2011
euuser1398928Apr 11, 2023 11:40 AM
3,109 Posts
Quote from vid1900 :
Yes (but you will need a sub with it's own crossover)
It has a preout. Should be able to just switch that from headphone to RCA and jack it into your subs LFE.

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