http://www.positive-feedback.com/Issue49/tannoy.htm
TECHNICAL SPECIFICATIONS
Recommended amplifier power 50 - 225 Watts
Continuous power handling 135 Watts RMS
Sensitivity 99dB (2.83Volts @ 1 metre)
Nominal impedance 8 Ohms
Frequency response 18Hz - 22kHz -6dB
DRIVE UNITS
Dual Concentric™ high frequency 51mm (2") with Aluminium alloy dome, Alnico magnet system with Pepperpot Waveguide™
Dual Concentric™ low frequency 380mm (15") Treated paper pulp cone with HE twin roll fabric surround. 52mm (2") round wire wound voice coil
Dispersion 90 degrees conical
CROSSOVER
Frequency 200Hz acoustical,1kHz electrical
Type Bi-wired, hard wired passive, low loss time compensated 2nd order LF, 2nd order compensated HF.
Adjustment +/- 3dB 0ver 1kHz to 2kHz shelving, +2dB to –6dB per octave over 5kHz to 22kHz slope
CONSTRUCTION
Enclosure type Compound horn
Volume 530L (18 11/16 cu.ft)
Dimensions 1395 x 980 x 560mm (54 15/16 x 38 5/8 x 22”)
Weight 130kg (286 5/8 lbs)
Finish Walnut veneer with solid walnut edging and trim detail