All German Physiks loudspeakers use the same DDD bending wave driver technology and all are capable of a degree of resolution significantly exceeding that of conventional designs. All feature exceptionally well damped, exquisitely finished cabinets and superior passive electrical components. Where our various models differ is in the number of DDD drivers used in each cabinet, the selection of subwoofer drivers and in the complexity of the crossover networks.


In 1978 Peter Dicks, engineer, mathematician and sociologist, was a very frustrated man. Dicks, who had no professional involvement in audio engineering at the time, had become fascinated with certain fundamental problems of audio transducer behaviour. After years of mathematical modelling and physical experimentation, he had created a design that he believed decisively surpassed the then state of the art. By 1980 Dicks had succeeded in developing an extremely impressive sounding prototype based upon his innovative design concepts.



  • THE PQS 302



THE DDD DRIVER : A Brief Description

At first glance the German Physiks DDD driver looks like a conventional piston cone driver. It has a voice coil/magnet assembly that serves as the actuator and it has a cone, though this is longer and narrower than usual. The shape is where the similarity with a piston driver ends. With a piston driver when the voice coil moves, the entire cone moves together with it – or that is what we want it to do. This is why the cone and voice coil structure is made as rigid as possible. The sound wave that a piston driver produces moves in the same direction as the movement of the cone - figure 1. This is why piston drivers are generally placed facing towards the listener.

The DDD driver, despite its apparently simple appearance is rather more complex. It has 4 modes of operation and in essence works as a mechanical 4-way system.
1. The lower frequency end of its operating range can be described with Small/Thiele resonant parameters.
2.  In the next frequency band up to the Coincidence Frequency, it works like a pistonic driver.
3. Next an overlapping band follows where pistonic movement is progressively replaced by bending waves until all the radiation is generated purely by bending movement in the cone. Due to dispersion and the cone’s special shape, the Coincidence Frequency is spread over an extended frequency range, rather than occurring at a single frequency like the Dipole Frequency.
4. The last mode of operation commences above the bending wave band at the Dipole Frequency, when the first standing wave occurs and where modal break-up begins.