Hey all I have been reading up here and there, and on another large, USA based AV forum they seem to build boxes out of 'baltic birch' because they feel it is best. I am gathering that this will either be impossible to get hold of in the UK, or very expensive if it is available, so what options do we have? I have read about the usual MDF (and have previously built a car sub box out of it many moons ago!) but also the alternative MDF that is more waterproof and better to screw into (as mentioned in the CNC'd box thread on here), UK Birch Ply, normal plywood... Which is best and/or most void-free?? And which is lightest but still good quality?! If I am lucky enough to get hold of the box plans I am hoping for, any weight saving I can make would be very handy indeed! Thanks in advance for any help you can give!