Nick,
Yes, other things being equal, a larger enclosure always provides deeper bass extension, but other factors intrude. I'll try and find the old article on my installation with the dimensions of the box and the driver model. The design was by the late Peter Mitchell, an audio guru and former astro-physicist who used to occasionally write a column for me on car audio. At the time, he was regular contributor to one of the US car audio mags.
Peter supplied the box dimensions and driver number and a kid from Pioneer Canada built it for me, the first person I ever heard use the expression "tricked out".
Alan
