first reflections

[elan]

can be useful build a broadband bass trap with rockwool 70kg/m3 cover it with fabric and in one face put the pyramids for early reflections?

i need to make a couple of gobo to put them on my left and right to avoid the first reflections

another idea is to take two traps 24"x48"x4" with rockwool and covered with fabric and pyramids and join them as you can see here

and put them in my left and right

or are better parallel?

[Glenn Kuras]

Your picture is not showing up but maybe I don't understand what you mean by "pyramids", but for first reflections (really called early reflections) plain 703 or mineral wool that is 2" or more thick will work fine.

Glenn

[elan]

rockwool traps with attached in one side pyramids i mean these 4 Inch Studiofoam Pyramids - Acoustic foam sound absorption products from Auralex Acoustics.
as pyramids, not them because costs too much, but similar

and the picture i've attached is the second one in this page Auralex Acoustics - MAX-Wall acoustic panel treatment kits.

i mean take two 24x48x4 traps and attach them together to do something like that.

but maybe one, as you say, is enough.

[Glenn Kuras]

Originally Posted by elan

rockwool traps with attached in one side pyramids i mean these 4 Inch Studiofoam Pyramids - Acoustic foam sound absorption products from Auralex Acoustics.
as pyramids, not them because costs too much, but similar

and the picture i've attached is the second one in this page Auralex Acoustics - MAX-Wall acoustic panel treatment kits.

i mean take two 24x48x4 traps and attach them together to do something like that.

but maybe one, as you say, is enough.

Yes one is enough but keep in mind that if you are going to use some "knock off" foam other then Auralex or a well known brand then you may end up causing more problems then it is worth. Not all foam is created equal.

Glenn

[elan]

for you pyramids are necessary in general? and which thickness for which purpose?

i mean 1 inch is useful for?
2 inch is useful for?
4 inch?

[Glenn Kuras]

Originally Posted by elan

for you pyramids are necessary in general? and which thickness for which purpose?

i mean 1 inch is useful for?
2 inch is useful for?
4 inch?

I would rather see you go with something like mineral wool or oc 703 that is 2" or more thick. If going with foam go for 3" or more thick.

Glenn

[elan]

i've this flutter echo in the mid/highs.. when i clap the hands.

i need to eliminate it?

i hear that come from the front and the rear wall, not to the ceiling because i have 8 traps in the ceiling covered with fabric.

but i've mixed in a completely dead room and is horrible.

so i'm a bit scared about that.

i want to keep the room live.

but a live room have flutter echo or a right control room live havo no flutter echo and is still live..

?

[Glenn Kuras]

Originally Posted by elan

i've this flutter echo in the mid/highs.. when i clap the hands.

i need to eliminate it?

i hear that come from the front and the rear wall, not to the ceiling because i have 8 traps in the ceiling covered with fabric.

but i've mixed in a completely dead room and is horrible.

so i'm a bit scared about that.

i want to keep the room live.

but a live room have flutter echo or a right control room live havo no flutter echo and is still live..

?

Only flutter caused from the speakers. Record yourself clapping, then play that back through your speakers. If you can hear the flutter when sitting in your mix spot then treat it. If not then you don't have to worry about it.

Glenn

[elan]

thanks glenn this is a great advice

if i clap in the listening position isn't bad at all..

i need just the right gobos to fix the stereo image..

[Glenn Kuras]

Originally Posted by elan

thanks glenn this is a great advice

if i clap in the listening position isn't bad at all..

i need just the right gobos to fix the stereo image..

Glad i could be of some help to you.

Glenn