Outdoor Loudspeaker Series

For a well known pro audio brand we developed a passive loudspeakers series with small to midsize ranged models made out of plastic.

Mechanical Engineering:

  • The designer provided a surface model which we turned into a solid model
  • Construction of the cabinets including for example the grill, braces, assembly details, draft angles
  • The goal was a 90% detail level for tooling process, the last few percent should be done by the supplier



  • All the models had been in house 3D printed,
  • Crossovers and cabinets had been assembled to be ready to use for acoustic approval at costumer site
  • Beside functional prototypes also various design prototypes had been printed


Acoustical Engineering:

  • Tuning the passive crossovers, taking also into account producibility, cost and performance
  • Documentation of possibilities to make the customer able to change for example the timbre of the sound
  • Power tests for specifying the dimensions of the parts including failure behaviour
  • Klippel laser tests to optimise the transducers
  • BEM simulation of the waveguides for the dome tweeter to achieve constant directivity


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Costum-designed horns and waveformers.

Cardioid line array elements or cardiod subwoofers.

Directivity engineering.

Beamforming techniques.


Immersive front surround widening.

Dynamical bass enhancement for portable devices.

Binaural algorithms for headphones.


Reflection reducing waveguides.

Sound stage software algorithms.

Speaker placements and sound tuning.

Adaptive nonlinear loudspeaker control. 


Constant directivity waveguides for dome tweeter, cones or AMTs.

Cardioid low mids in bookshelf format.

Full active DSP controlled system with FIR filters.