<https://forum.audio.com.pl/topic/72655-klipsch-heresy-iv-vs-heresy-iii/#comment-318228>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.audio.com.pl/topic/72655-klipsch-heresy-iv-vs-heresy-iii/>