||The L50B is a diameter50mm sphere shaped Acoustic Pressure Equaliser, designed for use with the Standard Microphone 4003 and 4006 or the A-B Stereo Kits 3503 and 3506.
It offers a stronger on-axis boost and off-axis attenuation than the L30B and L40B. Its larger dimensions accentuate the on-axis boost at lower frequencies and allow off-axis sources to be strongly attenuated above 1 kHz. This will give your recordings a more intense sensation of source clarity and presence, a marked increase in brightness, and extend the effective reach of your microphones.
You will also find that the L50B is particular useful for making recordings under reverberant conditions.