Eeyore wrote:

Serge Auckland wrote:

Used Acoustic Grade rockwool

Where did you get it and which grade(s) ?

Graham

I got it from my local Builders' Merchant, Jewsons. The stuff I used is
called Acoustic Partition Slab 67. Specs can be found at:-

http://www.rockwool.co.uk/graphics/R...ition_Slab.pdf

Rockwool make a variety of acoustic products, but most are geared to the
professional installer who wants a quick solution, preferably one
pre-finished, even if the performance isn't the highest. By using slabs
of the rockwool normally intended to be inserted between plasterboard
partitions, you get better absorption and a lower cost, but you have to
cover it yourself:- I used thin linen curtains from IKEA.

If you can't get APS67, Rockwool's conventional RW3 75mm panel will work
almost as well. It has a slightly lower absorption coefficient at the
high treble, but I can't imagine it would be enough of a difference to
matter much. RW6 is just too heavy to handle easily.

I lined the wall behind the 'speakers, from floor to ceiling. In a
conventional rectangular room, I would also go round the sides towards
the listening position about half-way to the listening seat. Ideally, I
would also line he ceiling to the same depth as the side wall, but
domestic considerations may rule that one out.

S.