3/7/2024 0 Comments Miracle box 3.0 review![]() ![]() As you will in the measurements, Fosi has made sure that they work correctly in this instance. I am not usually fan of tone controls in low cost amps because you can never set them to flat response (the detents are there but don't work). It was sent to me by the company and costs US $99.99 with 32 volt power supply.ĭespite its low cost, the case gives a feeling of quality. This is a review and detailed measurements of the Fosi Audio BT20A stereo class D amplifier based on TI TPA3255 IC. are welcome.Īny donations are much appreciated using : I am happy to add the Fosi Audio BT20A Pro to my recommended list.Īs always, questions, comments, recommendations, etc. They tell me they have internal R&D team and it shows. They were exceptionally polite, cordial and patient as I went through my testing and evaluation. It is also nice to see so much power coming out of this little box with the beefy 48 volt power supply, showcasing the advancements in amplification density we have today.Īs an aside, the company has been a joy to work with. Usability is excellent with high quality case and controls especially with respect to ability to set the tone controls to flat. You get a sense of that in company marketing material which includes Audio Precision measurements. ![]() The TI TPA3255 seems to be a capable platform when paired with a good implementation which is what we have in BT20A Pro. ![]()
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