Recent content by markus

That's exactly the question – does it really have "constant vertical directivity down to Schroeder?" Please post data showing this. I can't remember seen it published. Is it somewhere in Keele's papers? Yep, and it's of limited value for showing the claimed behavior with the Schroeder frequency...

No need to get snappy. IR peaks are dominated by HF. So again, can you please share those measurements?

Can you share those measurements that show a wideband 20dB attenuation? Hope you're not referring to anything IR related as this would be highly misleading.

Nice find! Includes a short and good summary of what science currently knows.

It's a cheap and simple way of having adjustable feet. Nothing to complain about. The issue in this thread is that the manufacturer claims the speaker performance would suffer without the feet installed (which it factually does not as the measurements show). Nowhere does the manufacturer state...

Psychoacoustically those 5-7dB can be considered "greatly minimized" when it pushes audibility below detection threshold. But yes, Bjorn seems to be a bit frustrated about how others talk about CBT ;)

Yes it does. As far as I can see, no one has claimed the opposite?

You could mount a reflective panel at the ceiling that can be tilted with two strings. Should be simple to build and effective for a first evaluation.

"Easy" to test: Do controlled listening tests with and without a ceiling absorber or reflector.

You mean "linear" as in "linear time-invariant"? That's what rooms, electronics and even "wobbling" SVS subs (largely) are.

That doesn't matter as everything is already contained in the measurements.

Any verification that this is not just a measurement artefact or misconfiguration/defective? Edit: Looks like all SVS subs show the same behavior so it's probably worth exploring what's causing this. Looks like some kind of processing within the unit to me (subsonic filter?). Anyway, group...

VBA tries to kill "length" modes, ART tries to minimize (the effects of) lower frequency reverberation within the listening area. P.S. Uli presents an updated view on VBA at https://www.audiovero.de/acourateforum/viewtopic.php?t=44&sid=4c611048d36ab4eb76beee1234554a26&start=30#p1637

Define "precisely" and "counterproductive swing-out behaviour" at subwoofer frequencies (<80Hz).

You just don't get it :) It's for people fascinated by science – "science" like in "science fiction". They don't want to actually "learn science", it would take away the "magic".