• The HEDD AMT

    Beautiful, isn’t it? All the ingredients you need to build one of Klaus Heinz’ HEDD AMT (which by the way is not a ribbon tweeter)

  • The HEDD AMT

    The diaphragm of the AMT consists of super-light and heat-resistant Capton material, which is laminated with thin Aluminum stripes that carry the audio-signal.

  • The HEDD AMT

    Each diaphragm is hand-folded multiple times with a special folding tool - demanding work. We are lucky to have Tatsiana (and of course Saziye) with us, a professional watchmaker with all the skills and thoroughness you need to achieve the best possible results.

  • The HEDD AMT

    Folding is done!

  • The HEDD AMT

    Now the diaphragm has to be glued to its frame.

  • The HEDD AMT

    Here you can see how the magnetic gap for the tweeter is prepared: A superstrong neodyme magnet is placed on the back pole plate and a ferromagnetic ring is added. It represents the magnetic yoke.

  • The HEDD AMT

    A felt is used between magnet and diaphragm to create a distinctive volume that helps damping the rear sound of the diaphragm.

  • The HEDD AMT

    Adding the front pole plate and the waveguide completes the unit. Shape and material of the waveguide optimise the directivity and allow for a lower crossover frequency for the tweeter, something very useful for an improved midrange reproduction in 2-way-monitors.

  • The HEDD AMT

    To complete the unit, the parts are screwed together. Additionally a terminal for the lead wires is mounted. Then the AMTs are measured.

  • The HEDD AMT

    And we are done! A new HEDD Air Motion Transformer is born.