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AEA

KU4

Ribbon Microphones

Supercardioid ribbon microphone, side-address design, pure aluminum ribbon, extended 20 kHz response, high SPL handling, low proximity effect

$8,020.00 CAD
Shipping calculated at checkout.
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Description

The AEA KU4 is a classic side-address ribbon microphone designed for modern studio work where focus, depth, and musicality matter. Inspired by the legendary RCA KU3A, the KU4 delivers the rich, natural character ribbon microphones are known for, while offering greater control in real-world recording environments. Its supercardioid pickup pattern helps reduce room reflections and unwanted bleed, making it especially comfortable to use in studios with less-than-perfect acoustics or in sessions where isolation is important.

Sonically, the KU4 is smooth, full-bodied, and detailed without sounding harsh or overly polished. It handles close placement with ease, offering a balanced low end and clear presence that flatters vocals, brass, low strings, and a wide range of acoustic instruments. Handcrafted in the USA with the care and attention AEA is known for, the KU4 blends vintage ribbon tone with practical, modern performance—making it a dependable choice for engineers and artists seeking an expressive, natural sound that sits effortlessly in a mix.

Features

Classic Ribbon Sound
Delivers a warm, rich tone with natural detail that feels smooth and musical on vocals and instruments. 

Focused Pickup Pattern
Captures sound clearly from the front while reducing room noise and bleed from the sides and rear. 

Studio-Friendly Isolation
Makes it easier to record multiple musicians at once by minimizing unwanted sound from nearby sources. 

Natural High-End Clarity
Provides clear detail without harshness, avoiding the sharp edge common in many modern microphones. 

Handles Loud Sources Smoothly
Works confidently on powerful vocals, brass, and low strings without sounding strained. 

Reduced Proximity Buildup
Allows close mic placement while keeping low frequencies controlled and balanced. 

Built for Long-Term Use
Handcrafted with durable materials and designed to deliver reliable performance for many years. 

Ready for Professional Studios
Fits naturally into modern recording setups and pairs well with a wide range of sources and styles.

Specifications

General Specifications
Device Type: Ribbon Microphone
Operating Principle: Pressure Gradient Transducer
Directional Pattern: Supercardioid
Polar Response: Native Bidirectional Figure-of-8, Up to 90 dB Rejection at Right Angles
Frequency Range: <20 Hz to >20 kHz
Maximum SPL: 141 dB SPL (1% Third Harmonic >1 kHz)
Sensitivity: 6.3 mV/Pa (–44 dBV/Pa) Unloaded
Output Impedance: 92 Ω Broadband
Recommended Load Impedance: 1.0 kΩ or Greater
Phantom Power Requirement: P48, 7 mA
Polarity: Pin 2 High for Positive Pressure on Front
Connector: XLR-3M

Transducer
Element Material: Pure Aluminum Corrugated Ribbon
Ribbon Thickness: 1.8 µm
Ribbon Width: 0.185 in (4.7 mm)
Ribbon Length: 2.35 in (59.7 mm)

Physical Specifications
Microphone Height: 11.6 in (29.5 cm)
Microphone Width: 3.9 in (9.9 cm)
Microphone Depth: 2.5 in (6.4 cm)
Weight with Cable: 3 lb (1.36 kg)
Shipping Weight: 4 lb (1.8 kg)

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