I appreciate that!

Glad it was helpful!

Glad it helped

Open areas can act as pressure relief "valves". However, the openings must be uniform and be on both sides of the room to avoid phase

One dimensional diffusion for front and rear walls with two channel playback if you have the distance to support one dimension of diffusion. If you do not have the distance, then you have 2-D as an option. However, 2-D will not add any spatiality like 1-D. 1-D will also add sepration to instruments and vocals. Background information such from singers will be more defined. You use 2 - D for non localization of boundary surfaces in a small mix or listening room where distances will not allow for 1-D. 2-D is used to minimize the impact of reflections on boundary surfaces. 1-D will add sepeartion and resolution increases.

@@AcousticFields Thanks for taking the time to reply, I appreciate it! Got it, really good to know and helps me. Like another commenter said, the amount of knowledge I have gained from you over the years is unmeasurable. Thank you!

A low frequency producing device and its location depends on many factors that are too vast to simplify. You must look at room volume, pressure levels used with chosen usage, room dimenions, driver diameter and count, room treatment rate and level along with surface area coverages of said treatment. just to name a few.

Most small rooms require over 50% surface area requirements on each of the 4 walls and ceiling areas to manage unwanted low frequency modes. Air gaps are not effective given the space they require. There are much better ways to obtain noise transmiion results without wasting air gap spaces. The location of subs is based upon room dimensions. Be very careful making generalizations about positioning without known dimensions, pressure levels, and usages.

This begs the question, why would you mix sound redirection technology with diffusion technology.

@@AcousticFields That's why I made the comment, so you can discuss the problem with doing that. I had to look closely to see that they were those redirectors rather than just flat absorption panels. I see people using different types of what they THINK are diffusors and it just makes me scratch my head as to why would they even think that would be a good idea. The most common mistakes I see are people are buying treatment from other companies and they seem to be only treating Oblique modes above 80hz based on the type, location and amount of treatment being deployed.

@@Oneness100 I believe in this room it was more form over function.

@@AcousticFields I'm sure that was a big part of it. To me, it's not esthetically pleasing, others might think it's cool. Most of the product reviewers and even many of the mfg's have horrible listening rooms judging from the type, amount and placement they use. I saw one video of a well known product reviewer showing his listening room. I was mortified at his choices in room treatment, it just looked like a mess. I would think that you could use it as an example of good instincts, wrong treatment videos. Maybe you can do more of those types of videos. If you want a link to a couple of examples, I can post them. 🙂

@@Oneness100 It does not matter what it looks like during the testing phase in room tuning. You can always make it pretty after you make it sound right. This picture illustartes form but no substance. Form plus substance equals esscence. This is all form with no substance. I can look at the pic and tell you why he is not happy with his room sound. I don't need to be in the room.

You must first address the low frequencies produced by the smaller height distance.

Its difficult. To avoid complexity, place your sidewall treatment starting at 12" behind the speakers to 12" behind the listening position all down the sidewalls.

​@@AcousticFields is there any recommendation for distance between floor to unit / ceiling to unit? Thanks

Building insulation panels can not absorb low frequencies. The laws of physics prevent this material type from performing at the requirements.This is one of the myths of this business which is perpertuated by the companies that produce and sell this material type.

@@AcousticFields Yup, now I know. A lesson learned!

Different projects do require different set ups. However, the physics of absorption and diffusion treatment remains constant for each usage..

@@AcousticFields that's evident. It would be interesting to watch a critical review on contemporary music (20's), with a particular focus on how bad sounds and on how poorly is recorded. Thank you 👍

We offer many solutions to issues. Take some time and watch those solutions. In order to apply a solution, you must know what not to do.

First: If you spend some time on Dennis’ website you will see not only solutions but information on the physics involved and why they offer specific solutions. Second: In this video Dennis DOES talk about solutions in contrast to what the customer has done on their own. Third: It feels like you yourself are just complaining … not offering solutions.