How thick should the front baffle of speakers be?

jsautter,
I disagree.  The Harbeth SuperHL5plus that I owned sounded excellent with all genres.  A very balanced, neutral and revealing speaker (which employed it's lossy approach to actually achieve this balance).

I have to agree with jsautter with respect to lossy cabinets. It’s an attempt to make the cabinets sounds “add” to the drivers output in a perceived pleasurable manner. My (admittedly) personal preference is a design that minimizes the cabinet’s -specifically the baffle influence on the overall output.

To the OP, how do mere moving pieces of moving paper cause the your pant legs to flap? The answer is it’s a sum total of the amp, speaker membrane, voice coil, magnet, cabinet and room interaction. 

Harbeth owners no doubt like the way their speakers sound, but on the larger models the resonant cabinets impart a sound that isnt on the original recording. All speakers do this, but on the Harbeth models I have heard this flavor is very apparent. So I naturally object to those that think these speakers sound natural as I hear the extra "gravy" as a distinct coloration. Just my take.

Mmmmmmm… g-r-a-v-y. It sounds delicious...