I possde a Bomaster 1900 for two years and apart from its radio technology dsute (manual), the sound is excellent with my Clestion Ditton 25. The look is great and few people have seen or even touch such a sensitive control - trs spcial as a product. Power is a bit tight. I mean the best sound is always available when using a hi-fi amplifier quality of 15% (pifomtre) of its power (insignificant various distortions, etc.) but with 25WRMS per channel, there is no margin we have the double.

Otherwise, no complaints and I will not change it for anything else of that power.
For DIYers: disassemble this device is difficult, nothing to do with the big beasts of other manufacturers. Rvis I made mine from B & O a price acceptable after all.