The latest member of the Z-family is in many ways just like a simplified Børresen 05 -though the Z5 is far from being a simple speaker.
75 x 30 mm Børresen Ribbon Planar Tweeter
2 x 5” Børresen Low Inductance / Low compression bass/midrange driver
4 x 8” Børresen Low Inductance / Low compression bass driver