Hello there,
my desk is introducing a strong comb filter effect. The speakers are already angled up by ~7°and I also tried to put them onto a staple of books (15cm or so) ... Does not change much...
I get a broad dip around 900Hz, then again @2.5Khz and from 4K upwards there is the typical combfilter pattern. When I sweep a sine, I can also hear the flucutations in loudness, so it`s not just a cosmetic problem.
Most of this disappears when I put a plate of basotect on my desk. The 1ms impulse, the 900Hz mess, the combfilters... (see spl graph from right channel)... all gone more or less. Obviously I could not use the desk anymore, so not a real solution...
Please have a look at the data and i also uploaded a photo of the "normal" situation and with that basotect plate.
Do you have any advice how to get rid of these effects? Does it make sense to buy tall stands and to angle the speakers downwards instead of using the small stands? I guess, it`s the last thing I could try, right? Want to mention that I can`t angle the whole desk. This will have to remain in a 90° angle to the ground.
Thank you!
SPL comparison (1/24" smoothing), right channel only
Impluse (1ms reflection gone with basotect plate on desk)
Listening situation
Basotect test
my desk is introducing a strong comb filter effect. The speakers are already angled up by ~7°and I also tried to put them onto a staple of books (15cm or so) ... Does not change much...
I get a broad dip around 900Hz, then again @2.5Khz and from 4K upwards there is the typical combfilter pattern. When I sweep a sine, I can also hear the flucutations in loudness, so it`s not just a cosmetic problem.
Most of this disappears when I put a plate of basotect on my desk. The 1ms impulse, the 900Hz mess, the combfilters... (see spl graph from right channel)... all gone more or less. Obviously I could not use the desk anymore, so not a real solution...
Please have a look at the data and i also uploaded a photo of the "normal" situation and with that basotect plate.
Do you have any advice how to get rid of these effects? Does it make sense to buy tall stands and to angle the speakers downwards instead of using the small stands? I guess, it`s the last thing I could try, right? Want to mention that I can`t angle the whole desk. This will have to remain in a 90° angle to the ground.
Thank you!
SPL comparison (1/24" smoothing), right channel only
Impluse (1ms reflection gone with basotect plate on desk)
Listening situation
Basotect test