Respectable frequency response (80-20K) from such a small package deliver clean sound.   Efficient and can handle a lot of power (5-100 rms) if you want to push them.  Impedance is 8 ohms.  The BTF-220's have been known to be used as satellite speakers for home theatre set-ups.  Speakers look clean and good with no defects however if you look closely at the finish there is a very very light spattering of tiny white specks which I don't even notice unless I get up right to it.  Speaker grill-covers super clean and easy to remove.  Serial numbers match.