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AEA KU4

Item ID: KU4

Unidirectional Ribbon Mic Constructed from Authentic New Old Stock RCA Ribbon Material

Special Order, But We Can Get It Fast

Because of our great relationship with AEA, we can usually get this special order item to you within a week or two. Please note that special orders are non-returnable and non-cancelable. Order online or call for more information.

Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.

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  • Retail Price$4840.00
  • Sweetwater Savings-$484.00
  • Tech SupportFree! SweetCare FREE Tech Support
    Trust Sweetwater's award-winning Tech Support department for FREE online and phone tech support, including our famous 20,000 article Knowledge Base. Learn more »
  • 2-Year WarrantyFree! Total Confidence Coverage FREE 2-year Warranty
    Regardless of the manufacturer's warranty, we'll protect this gear for two years.
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  • Sale Price:$4356.00
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From Our Research Team:

An Updated Version of a Classic!

Made from authentic new old stock RCA materials, the AEA KU4 is a modern revival of the legendary RCA unidirectional KU3A. This high-sensitivity ribbon microphone was originally designed for top-end Hollywood movie studios. Fewer than 600 KU3As were ever made, and those few engineers who were lucky enough to use them simply raved about their smooth sound, wide sweet spot, and minimal proximity effect. Now, the KU4 lets you experience this amazing mic in your own studio!

AEA KU4 Unidirectional Ribbon Mic Features:
  • Contemporary realization of the RCA KU3A classic
  • Supercardioid pattern for excellent rear rejection
  • Reduced proximity effect
  • Smooth, high-bandwidth frequency response
  • Authentic New Old Stock RCA ribbon material
  • High-quality anodized & nickel-plated finish
  • Custom AEA transformer, neodymium magnets
  • Consistent Quality
  • Field-tech replaceable ribbon assembly
  • Hand-crafted in Pasadena, California
Specification Detail
Microphone Type Ribbon
Polar Pattern Supercardioid
Ribbon Type Aluminum, 1.8 microns Thick, 2.1mm x 28.6mm
Frequency Response 30Hz-20kHz
Max SPL 140dB SPL
Output Impedance 300 ohms
Connector XLR
Weight 4.7 lbs.
Included Accessories Stand adapter, Case
Manufacturer Part Number KU4

Can We Help?

Sweetwater's friendly and knowledgeable Sales Engineers are regarded as the most experienced and educated professionals in the music industry, with extensive music backgrounds and intense training on the latest products and technologies. As your personal contact here at Sweetwater, they are available to provide personalized advice any time you need it.
Call toll-free (800) 222-4700 or E-mail us
What Does "Special Order" Mean?
A special-order product is one that we don't normally keep in stock. We order it from the manufacturer as soon as you order from us. We have great relationships with all the manufacturers we carry, so we can get your special order to you as fast as or faster than anyone else. Remember that special orders are non-returnable and non-cancelable, so make sure the item is right for you. A Sweetwater Sales Engineer can help you decide - call (800) 222-4700 for assistance!

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“ I have to say it's the most personal order I've ever made from the pre-ship phone call, to the email, and finally the candy in the box. Thanks! I don't think I could beat the customer service even in a local shop ”


Chrystal, McMinnville, TN

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See Also: Ribbon Mics , AEA , AEA Ribbon Microphones

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