I've been pondering...
In a DIY box (Sealed for the sake of this conversation) I'm aware that you can line it with underlay or similar to reduce high frequency ringing, and also stuff it with polyfill to increase the internal box size that the driver 'sees'.
Going from the links, both are a good idea:http://sound.westhost.com/articles/boxstuff.htmhttp://www.nousaine.com/pdfs/Box%20Stuffing.pdf
but there comes a point where the stuffing reduces the effectiveness.
The second link says that a box of <3 cubic feet you can stuff between 1lb and 1.75lb per cu ft and get increased effective box size by up to 40%, but boxes >3cuft should only have a max of 1lb of stuffing per cu ft and will only gain 25% extra at the most.
So, staying within those limits, does stuffing at the max limits effect the sound negatively? I read about too much stuffing reducing output and muffling the sound, which is not ideal(!) but does the stuffing reduce the subjective 'tightness' of the sound and make it seem a bit slower?
i.e. would, say, a 5cuft box with no stuffing sound 'snappier' than a 4cuft box with 1lb/cuft stuffing to bring it up to 5cuft? (ignoring any particular drivers)
I know popalock stuffed his boxes of 4 SI18s quite heav/iy, going from the pics?, and it is by all accountts awesome
but have there been any stuffing/no stuffing tests??