What can cause a 10db dip at 500hz and a huge 16db peak at 900hz?

[nqikz]

I’m pretty well treated with 4” rockwool panels in the reflection points, 7.5 inch thick bass traps in the ceiling and other absorption material. But I still have these annoying dip at 500hz and peak at 900hz.

From 50-400 and I look very good like +-3/4db. Upper midrange is smooth too. But this narrow dip at 500hz and mountainous peak at 800 is driving me a bit crazy.

Thank you for your help.

 

[drumphil]

Peaks and nulls due to wavelenghts and speaker positions and listening positions and room dimensions, and the fact that rockwool panels aren't going to do much to absorb low frequencies, and "7.5 inch bass traps" isn't a particularly specific definition that can be used to calculate anything useful.

 

[nqikz]

Peaks and nulls due to wavelenghts and speaker positions and listening positions and room dimensions, and the fact that rockwool panels aren't going to do much to absorb low frequencies.

Made some edits on my post. My low frequencies below 500hz are smooth. My only problem is 500hz and 900hz

 

[drumphil]

How did you calculate what frequency response you are expecting at your listening position, given the dimensions of of the room, the location and frequency response of the speakers, and the location and properties of the panels and bass traps?

 

[nqikz]

How did you calculate what frequency response you are expecting at your listening position, given the dimensions of of the room, the location and frequency response of the speakers, and the location and properties of the panels and bass traps?

Huh? I used House curve and a measurement mic in my listening position that I treated as much as possible with real rockwool and fiberglass panels

 

[drumphil]

OK, I'm now pretty sure that this is now officially above my pay grade, and that would still be true without whatever language barrier is going on here.

¯\_(ツ)_/¯

 

[AA63]

Would have to see your room/treatment setup. At that frequency (900hz) in small studio setups, that range are often desk or front wall.

 

[nqikz]

OK, I'm now pretty sure that this is now officially above my pay grade, and that would still be true without whatever language barrier is going on here.

¯\_(ツ)_/¯

Okay? You didn’t help anyways. I already knew about the basic things you mentioned.

 

[drumphil]

Would have to see your room/treatment setup. At that frequency in small studio setups, that range are often desk or front wall.

Room dimensions and expected properties of panels and traps would also be great, but I've got a feeling we may be involving ourselves in a sisyphean task.

 

[nqikz]

OK, I'm now pretty sure that this is now officially above my pay grade, and that would still be true without whatever language barrier is going on here.

¯\_(ツ)_/¯

Okay? You didn’t help anyways. I already knew about the basic things you mentioned

Would have to see your room/treatment setup. At that frequency (900hz) in small studio setups, that range are often desk or front wall.

Front wall is basically just a window. But the side walls are covered so is my ceiling. My desk is pretty big though. Big and wide.

 

[AA63]

Room dimensions and expected properties of panels and traps would also be great, but I've got a feeling we may be involving ourselves in a sisyphean task.

Indeed.

 

[AA63]

Okay? You didn’t help anyways. I already knew about the basic things you mentioned

Front wall is basically just a window. But the side walls are covered so is my ceiling. My desk is pretty big though. Big and wide.

Well those are both highly reflective and close to the speakers so as mentioned, I would start there. Thick curtains (or emulations thereof) and re-measure - if speaks are on desk, move them (and measure). Really need more much more details to be able to give you any kind of plan of action.

 

[JustJones]

My desk is pretty big though. Big and wide.

Try tossing thick pillows on the desk and measure one speaker.

 

[sam_adams]

But this narrow dip at 500hz and mountainous peak at 800

My remote viewing skills are a bit rusty, so it would help if you could post some measurements in the form of an REW .mdat file.

 

[thcdru2k]

Measure one speaker at a time at same position and show results with different pictures of room from different angles