I had a demo of some more speakers today which I will post about later on. For now I wanted input on 3 points raised by the guy in the Hi-fi shop. 1. The Linn Ninka actively biamped can hit 20Hz @ -3 dB, in room. 2. The guy can hear (not just feel but hear) the 20 Hz note. 3. CDs cannot reproduce notes lower than 20Hz. I find the first one very hard to believe given that there aren't that many subwoofers that manage this, the bass driver on the Ninka is under 6.5" and the quoted frequency response when actively driven is 38Hz-20KHz +/- 3dB. The 2nd one I didn't think was true either. I didn't think anyone could hear much under 30Hz never mind 20Hz. A web search shows that I was wrong, see here. The third I'm not sure about but I would give him the benefit of the doubt as I haven't looked at the spec for CD for such a long time. Comments, on 1 in particular?