Looks good, heavy, solid frame. Have tested wiith 2V sine generator at 90, 900 and 9000Hz - good, clean sound, no unwanted extras, goes down to 60Hz. At 50Hz I can hear only the moment of switching the speaker, then the buzzing is for me too weak, but 60Hz as the low freq. limit still is excellent for a 4inch speaker. Then I run music through the speakers, and find them really good. For now I have no case for the speakers, so tested them on table, with both front and back open. Expect them to sound even better in a proper case.