Frequency response curves: without filter (black), with steep low cut 80 Hz, 18 dB/oct. (blue), with gentle low cut 300 Hz, 6 dB/oct., with high frequency emphasis of +5 dB at 10 kHz

Frequency response curve with tolerance range

Polar diagram

Frequency response curve without filters at 0°, 30°, 60°, 90° angle of incidence