1 to 1 1/4 lb/ft^3 polyfill to get maximum apparant Vb increase. So, if you make a 56 liter net volume enclosure, use 2 to 2 1/2 lbs. They are normally found in 20 oz packages, so buy 2 and throw it in there. Pete
Should be great for music, IMO. Yes, 70 liters is a .55Q. To keep the enclosure size down a bit, you could make a 56 liter box and use stuffing to attain the .55Q. Titebond II is my choice for wood glue. If you surface mount the driver, 1" should be fine for a panel that size. Legs should...