Here my more simple answer, as a lot of the more technical details were shared already.
Closed cabinets tend to sound more 'dry' compared to ported / bass reflex designs.
So bass reflex design will sound LESS dry, by comparison and all this, even when either design is properly implemented.
Also, practically all closed cabinets have to use more stuffing, expensive sheep wool preferred to plastic / hollow fibre to make the bass drivers 'see' more internal volume, where as ported bass reflex cabinets need usualy a far more minimal rip-wool sheeting, layed on all surfaces exposed to the bass drivers.
Since the internal pressure in enclosed cabinets is immensely higher, internal braceing becomes more critical than in an open, bass reflex designs.
To build very large closed cabinets becomes very critical, to impossible.
I suspect, why designers doing this, went for airplane Dur-aluminium material rather than super-wood or wood laminate.
There is plenty more to all this, but this came to my mind on the subject, with out going into issues of Q, vs internal volume etc. etc.
M. 🇿🇦
PS: Early Watt/Puppy versions had some problems with their port design (too small in diameter vs required length), producing quite critical bass response issues.
Closed cabinets tend to sound more 'dry' compared to ported / bass reflex designs.
So bass reflex design will sound LESS dry, by comparison and all this, even when either design is properly implemented.
Also, practically all closed cabinets have to use more stuffing, expensive sheep wool preferred to plastic / hollow fibre to make the bass drivers 'see' more internal volume, where as ported bass reflex cabinets need usualy a far more minimal rip-wool sheeting, layed on all surfaces exposed to the bass drivers.
Since the internal pressure in enclosed cabinets is immensely higher, internal braceing becomes more critical than in an open, bass reflex designs.
To build very large closed cabinets becomes very critical, to impossible.
I suspect, why designers doing this, went for airplane Dur-aluminium material rather than super-wood or wood laminate.
There is plenty more to all this, but this came to my mind on the subject, with out going into issues of Q, vs internal volume etc. etc.
M. 🇿🇦
PS: Early Watt/Puppy versions had some problems with their port design (too small in diameter vs required length), producing quite critical bass response issues.