Audio-Technica AT4021 Small-Diaphragm Condenser Microphone

From Audio-Technica's rugged 40 series, this versatile cardioid pencil condenser mic captures every detail on acoustic guitar, drum overheads, and more.

Ideal for critical studio and live applications, the low-profile AT4021 offers a flat, extended frequency response, high maximum SPL and wide dynamic range. Its low self-noise is perfectly suited for the most sophisticated recording equipment. Its low-mass diaphragm improves transient response, increases response bandwidth and reduces handling and mechanical noise transfer. The microphone offers outstanding reproduction of low-frequency sounds.


- Outstanding performance and rugged construction
- High SPL handling and wide dynamic range
- Flat, extended frequency response
- Switchable 80 Hz hi-pass filter and 10 dB pad
- High front-to-back rejection ratio -- cardioid polar pattern improves isolation of desired sound source
- Low self noise perfectly suited for digital recording equipment
- Exceptional reproduction of low frequency sounds
- Low-mass element for superb transient response

Element: Fixed-charge back plate, permanently polarized condenser

Polar Pattern: Cardioid

Freq. Response: 20-20,000 Hz

LF Roll-Off: 80 Hz, 12 dB/octave

Open Circuit Sensitivity: -34 dB (19.9 mV) re 1V at 1 Pa

Impedance: 250 ohms

Max Input Sound Level: 146 dB SPL, 1 kHz at 1% T.H.D.;
156 dB SPL, with 10 dB pad (nominal)

Noise: 14 dB SPL

Dynamic Range (typical): 132 dB, 1 kHz at Max SPL

Signal-to-Noise Ratio: 80 dB, 1 kHz at 1 Pa

Phantom Power Requirements: 48V DC, 3.0 mA typical

Switches: Flat, roll-off; 10 dB pad

Weight: 119 g (4.2 oz)

Dimensions: 144.0 mm (5.67 in.) long,
21.0 mm (0.83 in.) maximum body diameter

Output Connector: Integral 3-pin XLRM-type

Accessories Furnished: AT8405A stand clamp for 5/8 in.-27 threaded stands; windscreen; protective carrying case

Audio-Technica Case Style: S1
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.25 lbs
Shipping Dimensions: 11 x 5 x 2 in
Manufacturer Part Number (MPN): AT4021
Warehouse Resealed, USED
Shipping Weight: 1.1 lbs
Shipping Dimensions: 11 x 5 x 2 in
Manufacturer Part Number (MPN): AT4021

For support or warranty questions, please contact the manufacturer:
Phone: 330-686-2600 x5000


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