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Yes but then they go on to state that : "...nevertheless the presence of the labyrinth meander means that each brick can also work at lower frequencies,” the authors added."

Could this be the next big thing in speaker technology? http://www.sci-news.com/featurednews/sound-shaping-metamaterial-4657.html Reading the article, it seems it could be ready to go in...maybe a couple of years??

Please excuse the late update but....from Australian Hi-Fi review of JBL's Studio 590 : Interestingly, despite the preponderance of advertising, all other things being equal, a paper cone is still stronger, lighter, and less resonant than either a polypropylene or a metal cone... but it’s...

Of course I meant to say"...it's all a bit academic".

Thanks Dean. I also found a review with some figures at a site called blu-raydefinition.com (I can't post links either, even in text format). According to this one, it'll put 200w into 4 ohms but at 1% distortion which is nothing to write home about. I guess it's all a bit problematic anyway as...

Just don't expect Rotel to tell you what power their A/B units put into a 4 ohm load and the distortion levels. I emailed them asking same and simply got a cut and paste from the RA-1570 manual (which doesn't give the required info). I then emailed a different email address asking the same...