AEA KU4

The AEA KU4 Supercardioid Ribbon Microphone is a modern replica of the legendary RCA KU3A used for Hollywood movies.

The AEA KU4 is a high-sensitivity ribbon microphone designed to provide all the smooth characteristics associated with ribbon mics with a supercardioid polar pattern offering superior rejection and wider sweet spot. As a result the AEA KU4 can be used in many instances where a traditional figure-of-eight ribbon microphone would pick up too much undesirable sound. A consequence of this unusual polar pattern is a reduced bass proximity effect, meaning that the KU4 can be used for closer mic’ing techniques. A low-tuned, low mass ribbon delivers a frequency response beyond 20kHz and accurate transient response.

The polar pattern on the AEA KU4 is achieved through the use of an acoustical labyrinth made of precision-milled aluminium and filled with material to delay the sound waves at the rear of the ribbon creating frequency-dependent phase cancellation. The rear of the 1.8 micron standard aluminium material is then blocked by a tube feeding into the labyrinth below the ribbon motor creating the necessary delay. The result is a superb supercardioid pattern with clear nulls between 120° to 150° and an attenuation of 24dB at 1kHZ at the 180° point. From 5kHz the polar pattern widens yet still manages to maintain 10dB of reduction at 180°.

• Contemporary recreation of the legendary RCA KU3A
• Supercardioid pattern for excellent rear rejection
• Reduced proximity effect
• Authentic New Old Stock RCA ribbon material

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.