Here is a good site with various materials and their effectiveness
https://www.bobgolds.com/AbsorptionCoefficients.htm
I have had good results with some bass absorbing materials, multiple subwoofers and using the free software REW and MSO (Multi-sub Optimiser).
Most anything big and absorbing can work. I have a wall to wall closet stuffed with pillows, sleeping bags, boxes of clothes etc.
Working with fiberglass is not bad unless you cut it. You can wrap 703 in muslin (cheap cotton fabric) before working with it or just leave in the box and throw the whole sealed box in the corner. Wrap it if you like. Aesthetics is another issue. Thinner panels only do so much
https://www.bobgolds.com/AbsorptionCoefficients.htm
I have had good results with some bass absorbing materials, multiple subwoofers and using the free software REW and MSO (Multi-sub Optimiser).
Most anything big and absorbing can work. I have a wall to wall closet stuffed with pillows, sleeping bags, boxes of clothes etc.
Working with fiberglass is not bad unless you cut it. You can wrap 703 in muslin (cheap cotton fabric) before working with it or just leave in the box and throw the whole sealed box in the corner. Wrap it if you like. Aesthetics is another issue. Thinner panels only do so much