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)
Front Side
Back Side
Power Variability
Amplifier Comparison Table
- 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
B
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
i didn't get the charging cable
J
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
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
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?