You may not know yet that ProAc has just updated the D30 to D30S. It is still available in a dome or ribbon tweeter - Response D30DS and D30RS respectively.
ProAc claims having developed a new 17.5 cm bass driver using a cone made from pulp and Mica, similar to the one used in their D48, to replace the 16.5 cm carbon fiber cone speaker of the original D30 for a flatter response. Note that the cabinet dimensions will stay the same.
Hopefully they have solved the issue of a little too warm of a bass response with the D30R.
Re. The Proac D30. How many versions of this speaker are currently available? It's all quite confusing.
1) D30 - is this the original model?
2) D30S - is this the one that comes with the carbon fibre cone?
3) D30RS - is this the latest model with the pulp mica cone?
4) D30DS - this is basically the D30RS but with the dome tweeter instead of ribbon tweeter
Lastly, is there a significant difference between the D30S and D30RS, or the D30RS and D30DS ?