Moving the turntable on a wall will fix some layout problems, as moving the left cabinet with lps elsewhere and fixing the tv on the right wall in front of the sofa. All this will create more space around speakers and ameliorate acoustic issues that are associated. Not?
Looks like the TT is on part of the main TV rack? I cannot see a join between the 2
Easy tiger you haven’t met Mrs B have you…change has to be introduced gradually! I genuinely value all input as often suggestions are things i hadn’t thought of😁 and i sometimes forget our house is a shared space. In fact the only space that isn’t is my cherished workshop!
Just waiting for somebody to suggest i knock down the doorway on The rhs…or simply move house😁 i have considered it myself in a lucid moment
Think hes referring yo the bookshelf on the lhs
I understand. Only suggestions. You then consider them as possible, or not. I had similar issue as you 2 years ago. My left speaker was very near a big and high cabinet. I had some bass distortion. When I removed it, I was surprised at how the sound became cleaner and open, with a better defined bass.
LH and RH with newe art Panel some noticeable attenuation
And then for each speaker
Then moving both speakers forward
both speakerd fwd and a dovet over the tv
Baseline spectragraph vs with Art panel
and with douvet over TV and moved forward
Just Speakers moved forward
I went through a similar excercise last year. I assume you are measuring at ear-level listening position? Did you also use REW’s function to plot room modes? My spectragraph looks lot like yours, but room has a massive 50Hz spike simply due to the size of the room and my listening position. Perhaps your 40Hz boost is because of the same? I managed to bring it down just a little by tweaking the sub’s phase a little and absorbtion via what is arguably the ugliest DIY bass trap in all of Amsterdam, but since it’s a room mode I can’t get rid of it entirely - except by moving my seat.
I think your right about the40hz going to have one last go by moving the shelving unit. Then bass traps here we come! I am encouraged by the influence of adding the single panel.
Less sure what to do about the attenuation in the middle of the plot.
Its a fun journey though!
Have you noticed that in the spectrogram with the duvet ove the TH, the 40Hz dies away a LOT more quickly.
This gives me an idea…
Try folding up the duvet and using it to fill the space behind the TV. Listen to the effect that has and also do a waterfall plot comparing with and without. There is a small chance that this could be a significant contribution to the bass traps required.
If this makes a significant difference, then the space behind the TV can be filled with foam (of course use fire retardant foam!) giving a useful bass trap that is very cheap and also doesn’t impinge on the aesthetics of the room.
Of course if you turn on the TV make VERY sure the cooling slots aren’t obscured!
Ive added the plot from just moving the speakers forward (No Duvet) similar as with, Will try the duvet behind the TV later
Your on to something!
Moving the speakers forward makes the biggest improvement to the waterfall chart.
and improvement in the SPL Orange
I then placed as many cushions and duvets I could find behind the TV and cabinet Blue
Then removed from behind the TV but left behind the LH speaker RED Very similar result so I think this could be a quick win add an absorber behind the LH speaker on the wall
It’s made a big difference to the impulse trace.
Does the music sound better as well?
I honestly think music does sound better. Thank you so much for your advice and guidance.
Dropped a note to the guys at GIK to see what they think about the attenuation between 400-1000hz as ive convinced myself that the top end feels too forward because of it! Could look to attenuate the top end but ive never heard of anybody doing that!
Leaving the corner bass traps until last as these will be the hardest to gain approval for!
With a complex room setup like that, it’s often very difficult to isolate specific problems in the FR traces to individual causes, other than by a process of elimination. This is particularly true in the lower midrange where you tend to get a lot of panel and cavity resonances e.g. from tables, bookshelves, cabinets, doors, and lighter structures (such as boxes round doors!), etc!).
You could try tapping things to see if they resonate in that frequency range, but you’re likely to find a lot of things do; which ones cause or contribute to the issue is another matter though.
My simple if somewhat clumsy plan is to buy some 600x600 traps from GIK, they come in a box of 4. Move them around the room and measure the effect. Starting with the wall behind the speakers and the 1st reflection points.
Nothing at all wrong with moving them about on a trial and error basis. But don’t just measure them , listen to them in all their various positions. Also , I know they are more expensive, but I would go for the Monster bass traps over the 244.
Monster bass traps are a given once i get wife approval! Smaller ones (242 or alpha pro) hopefully resolve some of the reflection issues
The reason I suggest Monsters is that the full range version is ideal for first reflection points but you get the added bonus of bass treatment as well. Obviously that assumes you get approval .