Fosi Audio BT20A PRO 300W x2 TPA3255 2 Channel Bluetooth 5.0 Power Amplifier

$79.99
$79.99

+ Free shipping

Features

Bass & Treble Control with Midpoint Positioning

Bluetooth Pairing Cleared

Op-Amp Rolling: SS3602, MUSES02, OPA2134PA

Replaceable Knobs: Orange Knob

MODEL
Quantity

Free shipping 

Money-Back Guarantee

Customer support

24 Months Warranty

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The upgraded version of Fosi Audio BT20A

Fosi Audio BT20A Pro 600W TPA3255 Bluetooth 2.0 CH Amplifier

Input: Bluetooth + RCA; Output: Passive Speakers + Pre-out
Amp chip: TPA3255; MAX Output Power: 300Wx2@4Ω
THD: ≤ 0.005%; SNR: ≥108dB; Frequency Response Range: 20Hz-20kHz(±1.2dB)

Bluetooth 5.0 Connectivity

Allowing you to connect your devices such as mobile phones and tablets from a greater distance, support to SBC/AAC.

Unique Design for Sound Control

Experience the authentic sound without any added effects by adjusting them to their middle points.

Full-range Pre-Out Output

Easily connect to a powered subwoofer, speaker, or another amplifier for versatile audio options.

Texas Instrument TPA3255 Chip

Has a unique smart algorithm that optimizes the output stage for max efficiency and min distortion.

Achieve a Distinct and Exceptional Sound Quality

The two plug-in NE5532 Op-Amps can be replaced by LME49720HA/MUSES02/OPA2134PA Op-Amps, etc.

High Precision and Stability Inductance Values

Low DC resistance and excellent frequency characteristics which improve performance

Front Side

Back Side

Power Variability

Amplifier Comparison Table

BT20A PRO

HT4S

V3

Type

Bluetooth 2.0 CH Amp

Bluetooth 4.1 CH Amp

2.0 CH Amp

MAX Power Output

300W x 2

30w*4+60W*1

300W x 2

Input

Bluetooth + RCA

BT + 3.5mm AUX + OPT

RCA

Output

Passive SPK +Pre-out

Pre-Out+SPK Out

Passive SPK +Pre-out

Treble&Bass Control

THD

≤ 0.005%

≤ 0.03%

<0.003%

SNR

≥108dB

≥88dB

≥110dB

Learn More

  • TI TPA3255 Chip Amplifier with 300 Watts x 2 Power Output: Advanced feedback design and high-speed gate driver error correction for efficient and high-quality audio performance, with low idle losses of <2.5W.

  • Upgraded High-Efficiency: A significant upgrade from the BT20A amplifier with replaceable Op-Amps for customized. You can replace the two plug-in NE5532 Op-Amps with MUSES02/OPA2604AP/SS3602 Amps to achieve a unique sound quality. With SNR≥108dB and THD≤0.005%.

  • Enhanced Bluetooth 5.0 Connectivity: The Bluetooth pair can be cleared by pressing and holding the volume control for five seconds. In addition, it has a memory Function for Easy Pairing and Alert Tone.

  • Customizable Sound with a Wide Range of Bass and Treble Controls: The BT20A Pro home audio amplifier offers a unique design for sound control. Enjoy original sound without effects by setting treble and bass effects to the middle point.

  • What you Get: BT20A Pro Power Amplifier x1, Bluetooth Antenna x1, 32V 5A Power Adapter x1, AC Cord x1, User Manual x1, our worry-free 24-month warranty, and friendly customer service.
  • Output Power: 300Wx2 @4Ω
  • Terminating Impedance: 2-8Ω
  • Input Mode: Bluetooth + RCA
  • Output Mode: Passive Speakers + Pre-out
  • Frequency Range: 20Hz-20kHz(±1.2dB)
  • THD: ≤0.005%
  • SNR: ≥108dB
  • Chip Set: TPA3255
  • Bluetooth Transmission Distance: Up to 50Ft
  • Bluetooth Transmission Format: SBC/AAC
  • Device Dimension: 5x5x1 inches
  • DC Input Range: 24-48V
  • Power Supply: 32V 5A or 48V 5A
  • BT20A PRO Power Amplifier x 1

  • Bluetooth Antenna x 1

Customer Reviews

Based on 139 reviews
82%
(114)
13%
(18)
1%
(2)
1%
(1)
3%
(4)
B
Benwin Yu
Amazing little giant

My set up is cayin cs55a tube amp pair with focal aria 936 speaker. To my surprise the bt20a pro and x5 to my turntable i was really surprise with the performance of this little fellow, the sound was amazing and it is not fatiguing to my ears. Will set this up to my secondary system will pair it with super linton speaker. The amplifier is really nice. I will purchase the gr40 to run spotify to my cayin tube amp. As i learned about fosi it is saving me money, i dont have to spend more to have my fatisfaction met.

M
Matic Muha
Review

i didn't get the charging cable

J
John
What sort of jack fits the speaker outputs???

I just received my BT20A Pro, but my old Polk Audio wall-mounted speakers have bare wire ends which used to feed into the back of the old stereo unit's speaker pinch jacks. I bought some RCA gold jacks that fit the Fosi's two line-in ports, but not the speaker output jacks, for some reason. My question is, what type of jack end would fit the Fosi's speaker output ports?

J
John624
Good small, low cost amp

Performs as expected and very good for the money, but a few improvements are needed to make this a 5 star product. First, it runs too hot with the 48V supply. When idling, it's burning about 20W. I turn it off when not using to save power, but this should be automatic. Best solution - decrease idling losses with higher supply voltages. Next best solution, shutdown power stage when signal falls below threshold to avoid power loss when not in use.

Also, once a Bluetooth device is registered, it should be able to auto-connect. Having to manually reregister a Bluetooth source is a pain and seems unnecessary today. I have 10 year old smart speakers that don't require this.

To be clear, I'm nitpicking and I wouldn't hesitate to buy another one if needed. This is a very good amp, but it could be great.

J
John Cossa

II would love to give you a review but I am looking for the proper bookshelf speakers to use for classical music. Can you help?