Instruction manual

Frequency Response. On-Axis ± 5 dB. 60 Hz. to 15kHz.
On axis response of a production sample DM70 taken in Ft & D Anechoic Chamber.
B & K equipment used throughout, with type 4133 microphone at 1 metre.
Crossover and Filter Unit. Individual Acoustic output from each Drive Unit, showing
Crossover frequency.
Polar Distribution. + 3 dB envelope to on-axis from 20 Hz to 20 kHz over 60 degree arc.
DM70 response for 30 degree arc and 60 degree arcs.
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