The Art+Sound mini-review of the superb German Physiks Unlimited Ultimate loudspeakers is now on our YouTube channel.
German Physiks truly bring something special to the speaker market with the DDD driver.
Where the driver cone moves back and forward like the piston in a car engine.
Where the driver cone flexes and a wave is made to travel down its side.
Where the driver cone is allowed to go into break up and areas of excitation are created on the cone surface. In a simplified form we can think of these areas as looking like the pattern of waves we see when a stone is dropped into a pool of water. In reality the patterns will be more complex and they will change with frequency.
By comparison, most loudspeakers use drivers that only use pistonic radiation. These have a much narrower operating range and as the frequency rises, they tend to concentrate their energy into a progressively narrowing beam.