The cabinet design uses the same type of bass loading as the D30S and D48 models which makes the speaker easier to position with respect to its frequency response.
The result is a wonderful open and expansive midrange with a substantial bass and sweet and detailed high frequencies from either ProAc tweeter option. A large sound stage is also a bonus.
The Response D18 had proven to be one of ProAc's most successful loudspeakers receiving critical worldwide acclaim. However, the D18 is only available with a dome tweeter, so to satisfy demand for people wanting a ribbon tweeter ProAc has redesigned the D18 using an upgraded cabinet with new bass loading, new crossover network and the ProAc ribbon tweeter used in other ProAc models.
This new exciting model is called the D20R and with the upgrades the sound quality has improved in all areas. Improvements comprise of a new cabinet with bass loading used in D30 and D40 models. A new crossover network and a ProAc ribbon tweeter as used in D30 D40 K6. The result is a wonderful open and expansive midrange with a substantial bass, ProAc ribbon tweeter giving sweet and detailed high frequencies, a large sound stage is also a bonus.