AEA Microphones KU5A Supercardioid Ribbon Microphone - Long & McQuade Music Educator Site
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AEA Microphones KU5A Supercardioid Ribbon Microphone

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The supercardioid KU5A breaks new ground in ribbon technology with its acutely focused directionality that rejects bleed from other instruments, room reflections, and loud ambience in the studio and on stage.

As a near-field ribbon designed for close range recording, the KU5A delivers the low-end heft and pronounced midrange one expects of AEA ribbons and with moderate, manageable proximity effect. Vocalists can sing directly into the grill of the KU5A, as its interior components are the most protected of any in the AEA lineup.

The active KU5A comes complete with a custom transformer and JFET electronics. It features the same custom transformer as the A440, R84A, and NUVO ribbon mics, providing greater output, less audible noise, and stable impedance. This allows for consistent frequency response and greater flexibility with different preamps, including those within audio interfaces. The boosted output of the KU5A is beneficial when recording quiet sources like vocals and soft acoustic guitars, and the active circuitry prevents noise interference. The KU5A operates with standard 48-volt phantom power.


  • Supercardioid polar pattern that rejects room tone and instrument bleed

  • Detailed, extended top end with ribbon smoothness and warmth

  • Supreme durability for close-range, outdoor, and live use

  • Active electronics and custom transformer optimized for all preamps

  • Front address design with built-in yoke is simple to position

  • Integrated high-pass filter switch reduces proximity effect at close-range

  • Matte black finish is discreet on camera


Operating Principle: Pressure gradient transducer
Directional Pattern: Supercardioid
Frequency Range: < 20 Hz to > 20 kHz
Maximum SPL: 135 dB SPL (1% third harmonic > 1 kHz)
Sensitivity: -43dBv (at 1 kHz, no load)
Output Impedance: 92 Ω broadband
Load Impedance: 1.0 kΩ or greater
Phantom power: Requires 48V Phantom Power
Polarity: Pin 2 high for positive pressure at the front of the microphone
High-Pass Filter: 6dB/Octave Shelf at 283hz

Off Axis Response:
Relative Output at 180 degrees: 12dB
Angle of Maximum Rejection: 135 degrees

Transducer Element
Material: Pure aluminum corrugated ribbon
Thickness: 1.8 m
Width: 0.55 in (1.4 cm)
Length: 1.175 in (2.9 cm)

Microphone Dimensions:
Height: 15 in (38.1 cm)
Width: 3.9 in (9.9 cm)
Weight: 2 lb 9.8 oz (1.19 kg)

Connector: XLR-3M wired to a 3 meter captive cable

Accessories Included: Storage case, user manual

Instant Classic!2 of 2 customers found this review helpful

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Product ExperienceI own it
Closest StoreOttawa, Ontario
This mic is insanely good! The rejection is like an sm7b, but the clarity is like a high end condenser, but with that smoooooooth ribbon mic sound, yet not dark and virtually no sibilance. Instant classic!
Posted by Russell on Apr 12, 2019
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Never Gonna Give You Up - Rick Astley - not FUNK cover feat Reeve Carney!!
Introducing the AEA KU5A Supercardioid Ribbon Microphone