Room Treaments - Where To Begin...

Yes, Ethan Winer is a good call. His YouTube videos are interesting and informative. 

I forgot to mention, there is also the forum 'gearspace' formerly known as gearslutz, which has a whole section on acoustics with articles on building stuff yourself and on measuring, which is easier than you think even though I don't know what you think, I think. There is a much larger community of experienced guys and well worth a visit.

@lemonhaze such a pity you haven't posted a system page.

Like millercarbon, the best sorted listening room I've sat in and heard music played on a system would be Mike Levine's. In your opinion what percentage of system budget would you expect for a room to come up to the relative performance of the stereo playing in it?

I've been reading where room proportions may matter as much and in some cases even more than just distances between boundaries in a listening room. And if you didn't have the budget to do an entire room all at once, where would you likely start?

Is your stereo in a dedicated listening room, or, living, shared space? 

Sometimes, you must compromise and are limited to what and where you can place things.

Another good all around audio book, which mentions acoustics and treatments is Robert Harleys book. 

You are on the right track!

Hi rixthetrick,

Difficult to apportion a budget as a percentage of total value of your system. I think of it as a case of taking X amount of $ to tame the room's acoustics which then will provide the correct acoustical environment to allow any and all systems to be heard at their optimum level of performance.

The room proportions do make a difference but are seldom found in the real world. The golden ratio or Fibonacci Sequence help with spreading the room modes so you do not get massive build up of certain frequencies. This is seldom found and is not an insurmountable problem. If possible avoid any one dimension being exactly twice or half that of another. So a cube would be absolutely worst case.

Any room, however, can be made to sound good. I made all my bass traps, diffusers and absorbers myself which does not cost that much. I used to visit demolishers and buy the insulation panels for peanuts. Look for Owens Corning 703 or similar.

Start with bass traps which need to be rather large but the divorce is worth it for good sound.  😎   These need to be big, you're dealing with long wavelengths so those dinky little scraps of foam Amazon sells are useless. Google superchunk DIY bass traps for an idea.

Corners are the place for BTs, any corners, the more the better. Usually the 2 front vertical corners are used for floor to ceiling traps but instating them horizontally along 1 or 2 wall/ceiling corners work just as well. This alone will make a very large improvement.

Place absorbers at the first reflection points. As I mentioned curtains, drapes or skimpy wall hangings do not absorb over a wide range of frequencies. Build or buy frames at least 4" deep to act as broad-band absorbers. The OC703 is available in panels 2'x4' so use frames to size or multiples. Panels 4'x6' or 3 panels 4'x2' with a small space between look smart and can be covered in different colour fabric.

A 'cloud' attached to the ceiling is a great way of eliminating the troublesome floor/ceiling bounce and does away for the need of a carpet or rug, though a rug will not harm anything. i helped a mate with a ceiling cloud and fitted an LED strip light around the perimeter on top. With the remote that came with it looked very neat, could change colour and dim to suite.

I am selling the old stone cottage and have abandoned any further work on the acoustics. I use Omnimic to measure which shows a consistently good T60 but also shows a slightly lumpy bass. Based on before, during and after screens that I need one more BT and job done.

Persevere with what you have started. You are clearly DIY capable so go for it and good luck.

@oregon +1
Yes, The complete guide to high-end audio, it’s a great book.
Chapter 4: How to get the best sound from your room.