ProAc invests a great deal of time researching the choice of diaphragm material for their drive units.
The ProAc Response D30S is available with either a dome or ribbon tweeter, known as the D30DS and D30RS respectively.

"I imagine designers carry designs around in their heads that maybe never come into fruition, and I am no exception. I like to sit outside under the stars and often get many good ideas from this peace and tranquility."

Stewart Tyler