Tannoy KINGDOM ROYAL Manual page 12

Its hard-edge roll surround has a very
low memory effect further improving
articulation in the mid and upper
bass and is also damped and shaped
correctly to terminate the moving
cone and provide optimum compliance
and linearity at large excursions.
This outer driver crosses over to the
high frequency unit at an exceptionally
low 700Hz to ensure key vocal ranges
are handled by the new tweeter.
This HF drive unit is one of Tannoy's
most radical driver designs to date.
It couples a 3 inch heat treated
aluminium alloy dome with a 1.5kg
ferrite motor to create an extremely
efficient horn-loaded compression
driver, to give reference standard tonal
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accuracy combined with exceptional
dynamic abilities. After bonding to the
copper-clad aluminium voice coil, the
assemblies are deep cryogenically
treated. This relieves residual stresses
in the microstructure of the dome and
reduces crystal boundary imperfections
in the voice coil for greater naturalness
and emotional communication of
the music.