Tannoy IQ 10/15 - Manual (Page 9)

Mid Frequency (Tri-amp option)
A comprehensive range of measurements including off axis frequency response curves, octave & third
octave polar diagrams (single & two cabinet arrays) and beamwidth plots as well as Ease
™ data can be
downloaded from http://www.tannoy.com/
Impedance (MF only)
Anechoic Frequency Response, 1 watt (MF) @ 1 metre on axis