27TDF is a High Definition precoated fabric dome tweeter with a wide, soft polymer
surround.

Sonotex precoated fabric diaphragm with high consistency and excellent stability
against variations in air humidity Sonomax surround for low resonance and excellent mechanical linearity.

Voice coil windings immersed in magnetic fluid increase short term power handling
capacity and reduce the compression at high power levels.

Optimally damped cavity in the pole piece controls and slightly lowers the
fundamental resonance.

The chassis is precision moulded from glass fibre reinforced plastic, and its front
design offers optimum radiation conditions.