See http://www.retrolinear.com/new-stuff/dreaded-foam.aspx http://www.retrolinear.com/new-stuff/dreaded-foam.aspx -- the same foam was used inside Hammond organ

See http://www.retrolinear.com/new-stuff/dreaded-foam.aspx http://www.retrolinear.com/new-stuff/dreaded-foam.aspx -- the same foam was used inside Hammond organs and Moog synths, with similar results.