My Setup

[EddNog]

Hi Ed!

Move the main system 30 cm away from the wall, and everything will be fine. The dip will shift to 90 Hz, and the subwoofer will cover it up there.

It gets worse if I move the speakers away from the wall because then I get a massive, much worse null around 170-190Hz. Pushing the speakers as far back as possible was how I eliminated that nagging null.

You can actually see it in the very first post of this thread.

-Ed

 

[FedotovKA]

It gets worse if I move the speakers away from the wall because then I get a massive, much worse null around 170-190Hz. Pushing the speakers as far back as possible was how I eliminated that nagging null.

You can actually see it in the very first post of this thread.

-Ed

I also spent a lot of time looking for the best positioning. In the end, I had to buy an additional KEF KC92 subwoofer. After about 20 attempts, I found the optimal setup: the main system is 15 cm from the wall, and the subwoofer is as close to the wall as possible.

This way, the system's low-frequency drop shifted lower, and the subwoofer compensated for it.

The distance to the driver center is 60 cm. The distance to the subwoofer center is 25 cm.

The SBIR effect was overcome!

Now I'm planning to additionally make a corner bass trap using mineral wool.

 

[canard]

I also spent a lot of time looking for the best positioning. In the end, I had to buy an additional KEF KC92 subwoofer. After about 20 attempts, I found the optimal setup: the main system is 15 cm from the wall, and the subwoofer is as close to the wall as possible.

This way, the system's low-frequency drop shifted lower, and the subwoofer compensated for it.

The distance to the driver center is 60 cm. The distance to the subwoofer center is 25 cm.

The SBIR effect was overcome!

Now I'm planning to additionally make a corner bass trap using mineral wool.

rather look at the tuned membrane bass trap side...see in DIY... ;-)

 

[FedotovKA]

rather look at the tuned membrane bass trap side...see in DIY... ;-)

I've thought about it. But the membrane design is more complicated to make and works only at a specific frequency.

I'm going to wrap the corner with stretch film, which also starts to work like a membrane, but over a wider frequency range.

But this is still just theory, needs testing)

 

[FedotovKA]

Here is the current result.
250-400 Hz is the fireplace resonance, please ignore it)

 

[canard]

I've thought about it. But the membrane design is more complicated to make and works only at a specific frequency.

I'm going to wrap the corner with stretch film, which also starts to work like a membrane, but over a wider frequency range.

But this is still just theory, needs testing)

no...it's broader in practice than a specific frequency...you just define a range more...

(
in just the mousse version...you might be disappointed...
)
otherwise there's still the "foam party".... hihi