Glenn Booth wrote:


Is the volume of the enclosure (erm, cupboard) important, or does it
simply have to be 'big enough'? I've looked at several of the web sites
that discuss infinite baffle systems, and they seem long on 'case
studies' but short on theory. I'm a dunce when it comes to cabinet design.


Download a copy of WinISD.
It is free.
It also gives a graphical display that
shows the effects of different box sizes.

The "right size" box has a bass roll-off
of 12dB/octave. A much bigger box approaches
6dB/octave so has more output (than the first box)
at very low frequencies but less output at
higher frequencies.

So you are probably better off using some of
the cupboard for an enclosure and the rest to
keep the vacuum cleaner in.

--
Roger.