I'm not going to touch elements of the OP's post, nor am I interacting with many of the replies. In fact, the only reason for me to reply at all is that the subject of acoustic treatment products, consultants, vendors, and just treating a room is a complex subject, a mystery to many, and so often misunderstood. Folks need all the good, solid help available. A number of very good products are available, as are a limited number of capable "consultants" for home high fidelity (or home studio, for that matter) acoustic treatment and/or engineering needs. The other side of the coin is the one you hope you don't call in a division playoff game. There seem to be a lot of those coins in circulation. Nuff said.
Regarding Acoustic Fields products and application/implementation for acoustic treatment of a listening room or home environment, it's a bit of a mixed bag. Several years ago, when I didn't know much about the science, I did contact the company. The response was not very informative, and it did not look like much work went into it. It appeared "turn-key." I wasn't comfortable at the time since I had read enough on the subject that too many questions remained for me. As I continued to study acoustic engineering and explore product testing and application, along with consulting with top engineers in the field, and as I saw Dennis' name and products pop up here and there, knowing what I now know, I'm glad I moved on. I can't accept his approach, and I don't have confidence in some of his products and their application. Amongst some of the best/better acoustic engineers out there, the opinions are less generous than mine, and that is across the board. Full stop. When reading those opinions and the basis for forming them, I find they are very well studied and well-reasoned from a scientific perspective. I fully agree. If a member asked me, I'd not recommend Acoustic Fields, nor would I suggest some of his products for implementation in a member's treatment scheme. Some products he shows on the Acoustic Fields site are okay, e.g., quadratic diffusers. I won't comment on the cost or materials, or make a comparison to other QRDs available, nor on specific applications in a given room. I certainly would not be interested in any other product. Were a member of friend to ask me for a recommendation, I wouldn't recommend the company.
Regarding Acoustic Fields products and application/implementation for acoustic treatment of a listening room or home environment, it's a bit of a mixed bag. Several years ago, when I didn't know much about the science, I did contact the company. The response was not very informative, and it did not look like much work went into it. It appeared "turn-key." I wasn't comfortable at the time since I had read enough on the subject that too many questions remained for me. As I continued to study acoustic engineering and explore product testing and application, along with consulting with top engineers in the field, and as I saw Dennis' name and products pop up here and there, knowing what I now know, I'm glad I moved on. I can't accept his approach, and I don't have confidence in some of his products and their application. Amongst some of the best/better acoustic engineers out there, the opinions are less generous than mine, and that is across the board. Full stop. When reading those opinions and the basis for forming them, I find they are very well studied and well-reasoned from a scientific perspective. I fully agree. If a member asked me, I'd not recommend Acoustic Fields, nor would I suggest some of his products for implementation in a member's treatment scheme. Some products he shows on the Acoustic Fields site are okay, e.g., quadratic diffusers. I won't comment on the cost or materials, or make a comparison to other QRDs available, nor on specific applications in a given room. I certainly would not be interested in any other product. Were a member of friend to ask me for a recommendation, I wouldn't recommend the company.