Originally Posted by GWCR
That statement seems counter intuitive to me. After all, they are pros/experts for a reason. I do appreciate differing points of view, as I like the discussions that they provide. Helps everyone to learn. However, the pros I have talked to and who have contributed to my build definitely know what they are doing, and I wouldn't be as far as I am without their input.
Pro does not mean expert - pro means they do it for a living. Expert is another matter. Just like amateur does not mean bad, it means 'doing it out of love' instead of making your living on it.
There are plenty of amateurs around that knows things a lot better than many pros... forums like this one is the definite proof of that.
Counter intuitive? Of course, that's part of the sale for sure. Assuming that since you're paying for it - it will be better (or faster) than you would yourself.
But if you don't know yourself - how can you judge? Some pro might have you install a LEDE kind of room and may be quite good at building LEDE rooms, but it could still be the case that for your particular room, it might not be close to the optimum acoustic build. But as long as it gets better than what you had, the pro behaving like he knows his stuff and it costs sufficiently enough - you'll have plenty of placebo effect in enjoying the room for sure.
For comparison - how many pros do we have out there designing loudspeakers - and how many of them is actually close to ok? And how many are sold on looks and price tag?
A lot of acoustic pros have their own style which they try to adapt to whatever room they get... sticking to the same products to use etc. But it would be different to as a number of them and compare their
suggestions - I'm sure you'd get quite different suggestions. You might still be happy with any of the resulting rooms, though. But it does lead to the question whether they really knew the outcome beforehand or it's more a matter of "it worked of this time too". Not claiming this applies to your particular set of experts, of course - how would I know? This is just a general statement.
Myself, I brought in the guy who designed the loudspeakers I will be using and I have seen a number of his room designs before and they are quite varied. Had I done the room myself after having looked around at previous designs, I would have done some things I now didn't have to after he crunched the numbers and tested the stiffness of existing walls&ceiling. So he actually saved his own fee in just stopping me from doing some acoustic fixes! And he definitely knows where his speakers benefits from having absorption and/or diffusion put up relative to the listening position(s).
I've never seen any bass-absorbers with a free passage in them anywhere before, so while I don't claim it can't work - I very much would like an explanation of what would be the benefit in physical terms.
It intuitively feels as if someone though it was needed for the sound to make it all the way in there... (sorry!)