DIY Broadband Absorber

[Jakeman1086]

Ok, this Christmas break is DIY time for me. I'm going to try to make 3 diffusers and 6 bass traps. You can see my other thread covering the diffusion build - homemade qrd diffuser. This thread is for my bass traps. I'm going to model this build after DIY Ultratouch Cotton Bass Traps / Broadband Absorbers as it looks way easier than my last build - John Sayers' Recording Studio Design Forum • View topic - My bass trap project.

Supplies:

Ikea:

IVAR side unit (12"x89"(or maybe 79")) - 2x6=12 $20x6=$120 (or $15x6=$90)
IVAR shelf (33"x12") - 2x6=12 $7.50x6= $45
OBSERVATÖR Cross-brace (39") – 6 $5.00x6=$30

PBISupply:

UltraTouch Cotton Batt Insulation – 24 batts

@R-21 x 16.25" x 94" (53.04 sf) - $65.77 per roll

Using 3 layers per panel (as the build I’m following did) and two batts side by side to fill the 33” width, that is -

6 x 3 x 2 = 24 batts x $65.77 = $1578.48

THIS CAN’T BE RIGHT!!? I’m thinking a roll is different than a batt. I’m looking here: SHOP ONLINE
Someone please correct me because I cannot afford this!

Going forward, since the width of these panels will be 33”, I assume that two rolls of 16.25” side-by-side should fit snugly inside. I plan to staple fabric to the inside of the frame, and behind this, staple chicken wire. Leaving the back end unstapled, I will stuff the ultratouch inside and staple the last side closed.

Angle Brackets – 8 per panel – about $10 per panel
Chicken Wire – Home Depot - $?
Burlap fabric – Price - $?
1 piece of 202” x 33” burlap vertically wrapped
Extra two strips of 89”x12” to cover the sides

I’m excited. This looks like a really quick and easy build that will work out well. Please tell me I’m wrong on the price of ultratouch. Thanks.

[Seamus TM]

Originally Posted by Jakeman1086

PBISupply:

UltraTouch Cotton Batt Insulation – 24 batts

@R-21 x 16.25" x 94" (53.04 sf) - $65.77 per roll

Using 3 layers per panel (as the build I’m following did) and two batts side by side to fill the 33” width, that is -

6 x 3 x 2 = 24 batts x $65.77 = $1578.48

THIS CAN’T BE RIGHT!!? I’m thinking a roll is different than a batt. I’m looking here: SHOP ONLINE
Someone please correct me because I cannot afford this!

It kind of looks like there are five 16.5" X 94" batts per "roll", if a "roll" is 53 sq ft.

Good Luck!
Seamus