Glad you found a solution for putting your speakers to good use. I wanted to add another perspective from a similar situation.
Last Winter I thoroughly researched Fosi BT amps, even emailing with their technical support to get full specs on their Class D amplifiers. Fosi amps were very enticing for their amazingly tiny size and high efficiency.
In the end though, I decided on the Sony STR-DH190. It’s a standard amp/radio/phono with a BT interface tacked on.
Advantages:
• Sony knows after so many decades how to make a reliable, performant amplifier section.
• When run at 85% power, the distortion is far below the Fosi’s.
• When it fails, I can return it to a local store rather than ship to China.
• The remote control has proven very useful. Receiver and phono functions if ever needed.
• Speaker protection relay for power on/off.
• UL listed.
So far, flawless performance.
Disadvantages:
• Costs more. ($99 on sale)
• Is a clunky stereo component that needs a shelf.
• Puts more carbon into the air to manufacture and run.
• Loss of the nerdy cool factor of going Class D.
YMMV of course.
