popularImmortalsolitude posted Jun 12, 2026 09:41 PM
Item 1 of 8
Item 1 of 8
popularImmortalsolitude posted Jun 12, 2026 09:41 PM
Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver $89.99 @Amazon
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Yes like most of these amplifiers with an external power brick the specs are a little deceitful. 2 * 300 Watts is the amount that the chip can handle. A much more potent power brick Will be needed to reach those numbers.
*Note: It should be emphasized that 300W refers to the maximum power supported by the product's chip, which can only be achieved with a 48V 10A power supply. The power supply's voltage and current determine the amplifier's maximum output. For more details, please refer to the illustration below on Power Variability.
https://www.amazon.com/Audio-Supp...0F54N3FX
so $80+$48 = $128 to get the higher power rating. plus you get the 32V 5A Power supply to toss in your drawer maybe for some future need. doesn't seem too slick.
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https://www.amazon.com/Audio-Supp...0F54N3FX
so $80+$48 = $128 to get the higher power rating. plus you get the 32V 5A Power supply to toss in your drawer maybe for some future need. doesn't seem too slick.
TPA3255: https://www.ti.com/product/TPA3255
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Definitely fun to tinker with different chips as they are friction mounted in a socket instead of soldered. Loads of fun for the price. $90 is a pretty good deal for these as I paid $80 without Bluetooth years ago. If you are looking to power some passive speakers, look no further.
Also, you can use a more powerful brick to push it to 300W per channel but I don't think it is necessary.
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