bass freq room problems?

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happymatty

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ok, so ive just moved into a new flat, all went well and the flats fine but when i listen to music certian low notes seem to bounce around the room or vibrate the walls? and overpower the rest of the music, i've tried flat EQ's put sponge's under my speakers and angled the speakers differently but with no luck, hoping someone could help me :)



everything is set out as it used to be, i have a corner unit for comp/stereo/records, speakers are about 3 feet apart at a 90 degree angle so on the chair my head makes a triangle, the unit is some hard wood, and the celings are about 8 feet and my old place they were about 11. the only difference in setup is the stereo being on top of the unti next to a speaker instead of one of the underneath shelve's.



any help much appreciated :)



matt.
 
How many sets of parallel walls including the floor and ceiling? Parallel walls cause normal room modes and undesired resonance. You'll need some bass traps and probably some other acoustic treatment.
 
ive just been reading up on that, the left speaker is facing a closer wall then the right, and the speakers are about 8 inches back on the desk.

would puting a curtain around the desk/chair from ceiling to floor help?
 
happymatty said:
ive just been reading up on that, the left speaker is facing a closer wall then the right, and the speakers are about 8 inches back on the desk.

would puting a curtain around the desk/chair from ceiling to floor help?
matt.
Click to expand...


Bass buildup will be a problem in any small room. Curtains won't help. Like Zeppe said, bass traps are the solution.

Check this article about "Minimizing the effect of room modes".
http://en.wikipedia.org/wiki/Resonant_room_modes
 
stefolof said:
Bass buildup will be a problem in any small room. Curtains won't help. Like Zeppe said, bass traps are the solution.

Check this article about "Minimizing the effect of room modes".
http://en.wikipedia.org/wiki/Resonant_room_modes
Click to expand...

sound's expensive lol

ok, i've always assosiated bass traps with the corner things, that right? or will i be looking at some boards for the wall and ceiling also? and the problem frequency is around 110hz should i take this into account?
 
You might want to move your speakers off the wall a bit if you can. Unfortunately curtains will only help with higher frequencies. You need something with mass to it. Leave those sponges under the speakers because the can help prevent coupling to your furniture. You said your using a flat EQ curve? Do you have a graphic EQ?
 
happymatty said:
sound's expensive lol

ok, i've always assosiated bass traps with the corner things, that right? or will i be looking at some boards for the wall and ceiling also? and the problem frequency is around 110hz should i take this into account?
Click to expand...

Doesn't have to be. :) Ethan Winer has a great article about building bass traps yourself and it goes through all the theory you might possibly need:
http://www.ethanwiner.com/basstrap.html
 
happymatty said:
sound's expensive lol

ok, i've always assosiated bass traps with the corner things, that right? or will i be looking at some boards for the wall and ceiling also? and the problem frequency is around 110hz should i take this into account?
Click to expand...


It's not crazy expensive if your a DIY kinda guy. A professional bass trap is basically just a 2' X 4' X 4" box filled with dense insulation. The box has a cover with holes drilled in a pattern to minimize the specific frequency range. There are tons of bass trap DIY sites. Some other things that might help are potted plants and fully stocked book shelves. Place them in the corners to help prevent bass build up.
 
Believe it or not but I have used both working as a acoustic consultant for Hi-Fi listening rooms. Sometimes the wife just won't go for bass traps and such. Not ideal but it can help.
 
Zeppe said:
You might want to move your speakers off the wall a bit if you can. Unfortunately curtains will only help with higher frequencies. You need something with mass to it. Leave those sponges under the speakers because the can help prevent coupling to your furniture. You said your using a flat EQ curve? Do you have a graphic EQ?
Click to expand...

aaa i think i understand now, bass' wavelength being lets say (for sake of argument) a foot long, so a few mm of material wont 'hold' the bass whereas a crate of foam would have plenty of room to dissperce the bass?

I'm using a little dennon all in one, just bass and treble and a 'SDB' function, however most of my music appreciation ;) is through itunes so yes i have a graphic EQ.

Zeppe said:
It's not crazy expensive if your a DIY kinda guy. A professional bass trap is basically just a 2' X 4' X 4" box filled with dense insulation. The box has a cover with holes drilled in a pattern to minimize the specific frequency range. There are tons of bass trap DIY sites. Some other things that might help are potted plants and fully stocked book shelves. Place them in the corners to help prevent bass build up.
Click to expand...

I've been know to use the odd hammer and saw, and the other half has a bit of plant life i could re arrange :)




Right then. Looks like im making a few bass traps!

thanks people.
 
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