QUAD L2 Series - Manual (Page 11)

Dual Catenary tweeter dispersion plate – cast from Aluminium, the new tweeter
plate enhances the dispersion characteristic, to prevent ‘beaming’ and to widen
the listening ‘sweet spot’. Polar response is exceptional with the frequency range,
even 45 degrees off-axis, being flat and extended.
This results in a consistently high standard of performance, regardless of where the
listener is sat in the room and reduces the effect that room furnishings have on the
in-room response.