[Blaser]

Brucek,

I have once made the assumption that room treatment cannot be as effective as equalization below 80 Hz in another forum and I was strongly attacked by the members as well as by a very well know person (that I do respect a lot) in this industry.
You have encouraged me to make my own experiment in my room and to explain my point of view (based on real world measurements), and discuss it with those who might have some doubt.

Let's begin with a quick description of my room which is approx. 1800 cuft (5 m *3.6 m * 2.7 m). My subs are located on the front wall while I am seating about 0.7 m from the back wall. Before applying any eq. my problem was mainly the axial mode which I have measured to be about 18 db at 36 Hz approx.

Thanks to this wonderful and best forum that I know, I bought the FBQ 2496 which corrected this peak problem.... (but is it only the 36 Hz peak problem???, we'll see).

My analysis will be about the effect of equalization on the axial mode decay (36 Hz ringing) through LF waterfall(which will add the parameter of time as explained by Master Brucek). Take a look at the unequ. and eq. graphs below. For the sake of keeping things fair, I will keep the SPL of 36 Hz the same for both equ. and unequ. graphs.

Continues in following post....