Love4sound
Well-Known Member
Nope i am dead serious. My front stage completely collapsed after i installed the 65 inch tv.
Tips for DIY room treatment
- Thread starter Love4sound
- Start date
Love4sound
Well-Known Member
I dont think its only cause of the front glass panel of the TV. Now that the LCR is close and there is a huge gap behind the TV it is trapping sound and causing bad reflections. May be i need to remove everything and treat the front wall completely. Its a tedious process so for now i will look at other easy ways to improve the soundThis discussion may help:
Covering Flat Panel TV While Listening To Music...
So the thought occured to me as I was looking through photo's of all your guys sweet listening room setup's to see if I can steal any good idea's for...forums.stevehoffman.tv
I have exactly the same issue. 65" plasma tv full glass. Can't do anything as it weighs > 60 Kg. The link you posted gives me an idea of covering it with a fleece blanket. But covering it everytime I want to hear music is going to be troublesome. Or should I pull the speakers closer to the listening position?That’s my Oled TvAnd yes it’s the major culprit for SBIR issues I am having. After upgrading to 65 Oled tv only I started to get so many issues in my room
Love4sound
Well-Known Member
SBIR is nasty and difficult to treat. You will need to treat the front wall completely.
Love4sound
Well-Known Member
So lets talk before and after measurements. Before measurements where all taken till 200 alone. I have never bothered beyond 200. All measurements are post audyssey.
1-Sub. Black after treatment-In sub response there is a small null in the 90hz region
2-Center with sub disabled. Only center frequency response from 15-180.Green is after treatment.Center without sub is more or less the same. There is improvement in one region but at the same time there are new nulls and overall the response is poor compared to before treatment
3-LR with sub disabled. Only LR frequency response from 15-180.LR definitely shows good improvements. Nasty nulls in 125 and 138 is gone but have a new null in the 132 region.
4-LR with sub engaged. Crossover set at 90.Black is after treatment-LR with sub has smooth crossover compared to before treatment graph. 4 big and nasty nulls gone and now there is only one null present
5-Center with sub engaged. Crossover set at 90.Green is after treatment-Center with sub also has a smooth crossover compared but no major improvements
Now please note that i used 1800gsm polyester wool to make my panels which absolutely has no impact below 600. As per spec data it has good NRC values till 600. So now if i treat my room for the frequencies below 500 using the right materials i am sure to get major improvements. For sure i can hear the difference in the upper mids and highs. I never had proper separations and panning before. Also if i remove the tv and completely treat my front wall it will give huge improvements but in a dilemma cause i will not be staying permanently in my current house and will be moving in another 3-4 years.
1-Sub. Black after treatment-In sub response there is a small null in the 90hz region
2-Center with sub disabled. Only center frequency response from 15-180.Green is after treatment.Center without sub is more or less the same. There is improvement in one region but at the same time there are new nulls and overall the response is poor compared to before treatment
3-LR with sub disabled. Only LR frequency response from 15-180.LR definitely shows good improvements. Nasty nulls in 125 and 138 is gone but have a new null in the 132 region.
4-LR with sub engaged. Crossover set at 90.Black is after treatment-LR with sub has smooth crossover compared to before treatment graph. 4 big and nasty nulls gone and now there is only one null present
5-Center with sub engaged. Crossover set at 90.Green is after treatment-Center with sub also has a smooth crossover compared but no major improvements
Now please note that i used 1800gsm polyester wool to make my panels which absolutely has no impact below 600. As per spec data it has good NRC values till 600. So now if i treat my room for the frequencies below 500 using the right materials i am sure to get major improvements. For sure i can hear the difference in the upper mids and highs. I never had proper separations and panning before. Also if i remove the tv and completely treat my front wall it will give huge improvements but in a dilemma cause i will not be staying permanently in my current house and will be moving in another 3-4 years.
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Love4sound
Well-Known Member
So after listening to few songs in stereo, 5.1 songs from movies in amazon,Netflix and watching few bass heavy action sequences from blu ray remux files i can see major improvements with mids and highs. I never had proper separations and panning. Now the separations with each channels is clearly heard and sounds very immersive. Mind punch also improved a lot. Sad part is the low bass which was awesome before treatment is gone. The low bass slam and extension was amazing that my recliner feels like it’s jumping. Now it sounds flat and I don’t feel it hitting my face or chest. I do listen at low volume levels and need to test at normal volume levels and experiment more with placement,settings etc since the time domain is totally different after room treatment. Over all the bass isn’t tight as before and feels too smooth and flat
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Crazy!
Love4sound
Well-Known Member
I couldn't fix the SBIR issues. Guess removing the TV and completely treating the front wall will only bring improvements. From what i have read and heard is that SBIR is Nasty and very difficult to treat. Let me share measurements so you will understand better.
1st Image: Individual measurements of L and right speakers 20-200HZ. Orange graph is the left speaker response and black is right speaker. If you notice the individual response is very good. Only a common null at 135 hz. If both LR combine and there is no SBIR or time domain issues both LR combined response should be smooth and flat except for a null at 135hz.
2nd Image: Combined LR response.Look at the nasty nulls when both LR are combined. I am certain its cause of SBIR issues.
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Moving the speakers is the only thing that has worked for me. There is something called tripple whammy or quadruple whammy that kills base because of SBIR (discussed at around 25 mins into the video below).
amrutmhatre90
Well-Known Member
@Love4sound what are your room dimensions? Is it a square? I have heard squared rooms are pain to get good responses and even treat.
This is a REW measurement I took for both Akai Speakers I worked upon and QA3050I.
Mic was placed at MLP, my room is a rectangular room with widest area having front speakers. I guess to many things between my LR speakers works for me.
This is a REW measurement I took for both Akai Speakers I worked upon and QA3050I.
Mic was placed at MLP, my room is a rectangular room with widest area having front speakers. I guess to many things between my LR speakers works for me.
Love4sound
Well-Known Member
Yes it’s almost a square 10*11 room. BTW have you applied any smoothing? Cause no way for the the entire range to Be flat.
amrutmhatre90
Well-Known Member
Love4sound
Well-Known Member
While sharing graphs don’t apply any smoothing cause it won’t give the real picture of what the actual response is.
amrutmhatre90
Well-Known Member
@Love4sound
This is without any smoothening, till 200hz. Had file saved and I just removed anykind of smoothening. I am a noob to read all these graphs so far, slowly learning.
What was the size of your TV earlier? What are the benefits of the material you used instead of rockwool?
This is without any smoothening, till 200hz. Had file saved and I just removed anykind of smoothening. I am a noob to read all these graphs so far, slowly learning.
What was the size of your TV earlier? What are the benefits of the material you used instead of rockwool?
Love4sound
Well-Known Member
Very good response. Previous size was 43 inch. Rockwool will be more effective compared to polywool which I used but polywool is a safe material compared to rockwool and hence I went with it
Love4sound
Well-Known Member
Any tips to reduce reverb time in the 50hz-100hz range? I have managed to address most of the issues but the reverb time is extremely high in the 50hz-100hz range. Will adding corner traps in the highlighted areas improve the reverb times? The corners in the images are front and rear right corners, top left,top right side and rear corners
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Love4sound
Well-Known Member
So I am really enjoying treating my room as much as I have enjoyed doing few frequent upgrades with my gears in recent times. Results are really amazing. I got my hands on a huge pile of pyramid foams so I completely stuffed my rear loft with them and the results are awesome. 3rd image has the pure direct and eq graphs before loft treatment. 4th image is the pure direct and eq graphs after loft treatment. Got rid of two nulls and now 60-120 raw response itself is completely flat and over al bass response is amazing. Now two other problems remain which is clearly heard and felt. SBIR and ringing due to high decay time. There is some improvements with decay time as well after loft treatment.
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amrutmhatre90
Well-Known Member
Lots of improvement, but I hope the room doesn't sound too quite. Glad you are enjoying it.
Also how are things outside room now? Possibly neighbours or adjacent rooms or walls, have things tammed down more?
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