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Listening room ISSUES

Hi first let me introduce myself I'm new here and my name is Scott I'm 63 and I've been an audiophile all my life. I recently moved here from a place that had a dedicated listing room it was perfect 24 by 36 and a ceiling 12 ft high. Now my room is and likely will forever be 11 ft 8 x12 ft by 7 ft 8 in tall
One of the 12 ft walls has a door 3 ft from a corner and two windows in the other corner the other 12 ft wall is only 66 in Long with the other eight plus feet as an opening to a room that is 9 ft deep because of the opening on one 12'wall and a door on the other 12' wall I sit on one of the  11 ft 8  walls . I don't have the correct measuring equipment but I did go in a room  calculator and a speaker placement calculator and and even where I am forced to sit I am backed up to a wall literally a foot behind my ears the room placement calculators indicate the speaker should be about 4 ft apart 4 ft from the sidewalls and about two and a half from the front wall . I I really need to draw this . Initially I was sitting against the long wall . But living in the northwest when spring came I wanted to look out the windows so now I sit on the short wall.  This room has standing waves that are certainly higher than the tallest wave ever surfed. The base just overwhelms the mid-range I have tried room treatments for early reflections and The comb filtering I've been binge watching studio room treatment experts and this room breaks all the rules . My equipment is . Techniques SL-D 202 Shure M91 ED . Dennon PRA 1100 pre amp. A Dynaco VTA ST -120 I put the kit together in 2011 . Klipsch kg4 . I use a crown XLS 1502 with the  internal high pass filter at 60 cycles. Running a JBL 2445 H in a DIY 12.5 cubic foot enclosure tuned to 30 cycles.
I built it for the Klipsch LaScalla that I used to use in my old place. Yes I tried the LaScalla and you can imagine how that went.
But in my defense they still sound great in the front yard.
 I don't have a clue what to do. I have thought about putting my back to the open Wall but it would leave only 30" to get through but I am going to try it out if anyone thinks it's worth a shot . Thank you in advance for your help 🆘. Please excuse my typos .

scottttt

Showing 3 responses by hilde45

hilde45's avatar
hilde45
4,819 posts
 
A drawing would help. Any chance you'd try diagonal placement?
https://www.decware.com/paper14.htm
hilde45's avatar
hilde45
4,819 posts
 
Information about Helmholtz resonators are all on the internet.... Let not the mathematical formula threaten you, use your ear, no need to calculate anything....But you need time to experiment.... It take me 3 months for 40 resonators....

I’m very interested in Helmholtz resonators but the process described is very involved and requires a situation which permits time and control over your listening space.

That said -- let’s assume you could follow Mahgister’s advice. The obstacle for me would be this: if the resonators are very specifically tuned to remove certain ranges of frequency (and this is why they’re so good!) then one would have to know which frequencies one needs to remove or dampen. It’s no good to build a resonator for a specific frequency range and then decide to move one’s speakers or listening position, etc. Because in that scenario, one is left with a useless tube and wasted time.

I would think that these resonators are the LAST thing you do, after everything else has been decided and treated to the degree possible, and all permutations of listening position and speaker and sub placement has been tried.

Do I have that approximately right Mahgister? I want to contextualize your suggestion so I can better understand how and when the Helmholtz solution is effective to try.


hilde45's avatar
hilde45
4,819 posts
 
@mahgister Thank you very much for your additional explanations. And yes, the cost in dollars is zero! You have successfully communicated that point! That is very important to some people, but as you know, for people with money to buy equipment, the more important cost to them is time. And, of course, aggravation. This is why a smooth and efficient process -- by hiring someone --is often worth the money to people who have the money. They save time and aggravation.

I, personally, like the idea of understanding how the physics and acoustics of my room add up to a certain listening/sensory experience. That saves money and, for me, gives pleasure. Part of the love of audio. But even I do not want to search for a needle in a haystack, so to speak. This is why I need to see where this experimental process can become chaos rather than organized fun.
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