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Old 13th February 2020
Lives for gear

Originally Posted by nwtlnts View Post
Thanks Jens- good post!

I still have the question- should I hang the cloud so that it slants along with the ceiling, keeping it parallel with the ceiling? Or just keep the cloud flat and level, parallel with the floor and flat above the kit?
LOL, did you even read what Jens said? He answered your question.

The only advantage (apart from possibly esthetic) of mounting an absorber (assuming broadband and not partially reflective) at an angel in the ceiling, is to gain depth behind the panel (and thus better low frequency performance) at one end, while keeping some ceiling height at the other end. If possible: Mount the panel with as much air gap behind as possible (or even better; fill the entire depth, or at least half of it, with wool of appropriate flow resistivity for the given depth), even if it does not result in an angel relative to opposite surface; again; assuming broadband absorption panel.

If reflective (at least for mid and high frequencies); we often need to angle panels, primarily to redirect early energy away from the sweet spot, but also on other areas simply to avoid annoying flutter echo that otherwise often becomes very audible in treated rooms.
Essentially, if you want better low freq absorption, leave the panel flat (seeing as the angled ceiling will perform the same way an angled panel against a flat ceiling would). The side that has the larger air gap will give better bass absorption. So, again, in your case, if you leave the entire cloud parallel to the ceiling, then the absorptive properties will be the same from end to end. But if you leave it flat, the part of the angled ceiling, with the wider distance between the the top of the panel and the ceiling, should give you a bit more low freq absorption.

If you still have doubts, try both and measure the response using REW and a flat omnidirectional mic.