DIY Bass Traps for smallish rooms

[himadri]

Hi
My earlier experience in Speaker Placement is given in
http://www.hifivision.com/av-enhance...xperience.html
Recently, Inspired by PDhanwada's thread, Stephen Helm's DIY efforts and many others , I have built and commissioned Corner Chunk Bass Traps in the 2 corners behind the speaker. The major ingredients are:
Casing made of 3/4 '' plywood boards stuffed with 96 kg/m3 rockwool , front cover 4mm polyester sheet and outer fabric.Dimensions 500mmx500mm for the 2 arms of the triangle and height 4 ft.
Net Result so far:
Overall cleaner, more airy and detailed sound with more headroom for higher SPL's since the midbass boom is reduced.Not much significant reduction is extreme lower end for which speaker placement is still the key.
Overall: A significant and cost-effective upgrade for smallish rooms.
Cheers
Himadri

 

[manoj.p]

very nice. You can use those as corner tables too.

 

[GeorgeO]

Very well done. I am also considering doing something on those lines, and was reading through Pandu's earlier thread yesterday to refresh my memory.

 

[sidvee]

Nice job Himadri! I like the pattern/color of the fabric used. Where did you get it from?
Cheers,
Sid

 

[odyssey]

very nicely done

 

[anm]

how about extending these to the top corner of the room?

 

[himadri]

Thanks Sridhar,ANM,Sid,George,Manoj
Manoj-Corner tables yes,time will tell.
Sid and George-The polyester Sheet and fabric were sourced from the local furnishing store.As warned by Pandu, I was specially careful about sealing the Rockwool. Incidentally, I was lucky to get the 50mm Rockwool slabs cut from the factory itself (1000mmx500mm slab cut into 4 triangular pieces)which saved the messy and itchy job of getting them cut by my carpenter.A local factory makes them regularly for industrial use.
ANM-extending to top corner would have been ideal.I might go for it later after experiencing the benefits of this partial trap and also shall need wify's concurrence.
Cheers
Himadri

 

[santhosh]

Nice DIY Himadri, could you please post dimensions of the bass traps.

TIA

Edit: you have already posted dimensions. Thanx.

 

[olly42]

Nice Job Himadri

 

[himadri]

Thanks Olly and Santosh

 

[aakashr]

hi guys,

any acoustic experts here? I need some basic acoustic info for my dedicated HT, would appreciate the help.

Thanks

 

[rikhav]

Hi Himadri
Very well made bass traps.

If you dont mind can you share the total cost of making the bass traps

 

[GeorgeO]

Aakash

I suggest you do a bit of reading up on some earlier threads( lots of useful info is available)and then ask for specific suggestions.

 

[himadri]

Thanks Rikhav
Appx. cost is as follows:
3/4'' plywood 2400/-
Rockwool slab 50mm 96 kg/m3 600/-
4mm polyester sheet and fabric, carpentry,spray painting etc. 2000/-
Total cost Appx 5000/- for 2 nos. traps.

Cheers
Himadri

 

[pdhanwada]

Himadri,

I filled up three corners from bottom to top. Each corner contained three pieces of 3ft height. That helped soften up and even up the bass across the room. You could have done the same.


My bass trap dimensions for others who were asking for dimensions.

17 in X 17 X 24 front corners

14 in X 14 X 18 back corner (1). The other back corner has a door.

Thanks
Pandu

 

[anm]

^^^ pics pls

 

[himadri]

I filled up three corners from bottom to top. Each corner contained three pieces of 3ft height. That helped soften up and even up the bass across the room. You could have done the same.

Pandu
You are right. I had followed your thread on the subject. . At present I am assessing the sound, taking the traps, the room furnishings etc into consideration. I shall take a decision based on the same as extending the traps to the roof calls for modifications in the window curtain system also.
Cheers
Himadri

 

[LIZARDKING]

Hi! I am facing a problem like Pdhanwada. I have a door too in the rear corner, my whole room is treated with 3" of foam, plywood on the panelling and fabric all around. the floor is 4" thick and carpeted. the ceiling has a false ceiling and is stuffed with 3" of foam in the wooden paneling. My room size is 16' by 16'. Its a dedicated room with 4 recliners in a line. The equipment i use is there to read and as you can see I am using a Velodyne dd15+. Earlier I was using my Velodyne spl12 along with the dd15 but not anymore. I still dont find much of a difference by excluding it. I get too much of booming in all corners reaching the corner seats. what can I do with my bass traps? I can have them in three corners but not in the fourth for i have a door there.
Thanks!