John Sayers' Recording Studio Design Forum Archive

A question for the Australian Ladies and Gents.

My mate Sean and I want to make some of those great Broadband Absorbers shown in the sticky. However we do not have access to Owens Corning 703 down here.

I have read through many of the posts and many have said that Insulco make product that is compairable to 703.

What is this Insulco product that we need? (please be specific, R Value, product name), is it the Acousti-Therm™ Batts?

Also, there is a product by CSR called Bradford Soundscreen is this insulation anygood, asuse it is easy for me to get this stuff?

Rock on you fine Acousticians!

Hello Anyone

No abruptness intended. 703 is the tradename Owens-Corning uses for 3 lb/ft^3 density silicon based mineral wool. General agreement is that rock based mineral wool of 4.0 lb/ft^3 is equivalent.

Enjoy your new acoustics!
Andre

I've looked into this stuff, there are other posts on the forum about insulco.

here are the acoustics specs for insulco's products. look at the NRCs for each frequency band on page 2.
http://www.insulation.com.au/INSULCO/WE ... c-Data.pdf

"insulco semi-rigid" is a 32kg/m3 product that is from their industrial range. I have just ordered 2 packs of the 50mm stuff at $150 a pack - 5 pieces of 2.4m x 1.2m per pack.

R2.5 "acousti-therm" (95mm thick) is slightly better than the 50mm "semi-rigid" where it counts (125-250Hz range) but its twice as thick so it takes up more space and leaves less air volume behind for same depth. Air volume also helps trap bass. It was only a bit cheaper than the semi-rigid for the same area.

I ordered the semi-rigid from a place in Brisbane called Discount Insulation and Solar

http://www.yellowpages.com.au/onlineSol ... 7e40&st=bn

Bunnings will special order insulco semi-rigid. They quoted me $197.50 but wouldn't match the $150 quote from DIS because its a special order.

100mm insulco semi-rigid would be better but I need to cover more wall space to control high frequency reflection because my room is small.

With 2 packs of 50mm semi-rigid I can build 6 broadband traps for across wall intersections, 2 small clouds and 6 first reflection absorbers.

This is just the info I needed. Thanks a million.

Rock on
Kitch