Originally Posted by SherazNJ
I was reading up more on Acoustic treatment since fiberglass panels are arriving on Tuesday, I came across this video on youtube from Ethan Winer who sells professional Acoustinc panels.
He said that the best listening position is 38% from front wall of room. 2nd best is 38% from rear wall.
Mine room is 27 feet long and 38% of that is 10.26. I'm sitting at 16 feet distance. Way off the best acoustic location :-(.http://www.youtube.com/watch?v=lbLVjHfHahg
Following are some very interesting points he mentioned.
1 - Most important bass frequency range is from 60 or 80 to 300.
2 - Install rear reflector only if rear wall is 10 feet or less closer. Another interesting point he
3 - Install Broadband (not tuned) bass traps. I don't know the diff b/w Broadband vs tuned yet.
4 - The more bass traps, the better it is.
5 - Bass traps are semi reflector to absorb bass as much as possible and reflect mid-higher frequencies.
Your opinion guys?
Originally Posted by Saturn94
I'm curious why he considers 60-300hz the most important bass range? Personally I find the entire bass range important for a satisfactory experience. Perhaps if only listening to music, and depending on the kind, you could do without frequencies below 40hz or so.
Ethan considers the 60 - 300 Hz the most important range for 2 reasons:
1. Because 60 - 80 Hz is the lowest range that his bass traps can affect, (and it is a stretch to get to 80, much less 60 Hz.)
2. Because 250 - 300 Hz is the maximum "modal" range of most residential sized rooms. 250 - 300 Hz is the higher limit of the "Schroeder frequency," (or "transition frequency"). http://www.acousticfrontiers.com/whats-new/2012/3/14/the-schroeder-transition-frequency-explained.html
Above the Schroeder frequency, the wavelengths become so short that they no longer "resonate" between the room dimensions. Instead, above the Schroeder frequency, the response becomes "reflective." Ethan sells acoustic panels that absorb higher frequency reflections, but they're differentiated from "bass traps" that are used to absorb bass frequencies from 80, (barely) to 250 Hz and reflect frequencies above that.
An acoustic panel that is thick enough to absorb the lower range, (Schroeder/modal frequencies), and does not have a reflective surface to reflect the higher frequencies, is considered a "broadband" absorber, (but most of those need a significant airspace behind them to be effective at low frequencies.) Also, broadband absorbers *can* make a room sound overly dead by absorbing too much of the higher frequencies.
Sherez, in terms of your listening position, calculate 38% from the rear wall, which is Ethan's 2nd best LP. You're VERY close to that. Moving forward to 38% from the front wall would put you too close to your very large screen. (How big is your screen, anyway? It looks like it's about 12' wide or about 165" diagonal.)