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Audio-Technica AT4021 Small-diaphragm Condenser Microphone Demo

Small-diaphragm Condenser Microphone with Cardioid Pickup Pattern, 10dB Pad, Switchable 80Hz Highpass Filter, and 20Hz-20kHz Frequency Response
5 Write review Item ID: AT4021d1

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Audio-Technica AT4021 Small-diaphragm Condenser Microphone
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Focused, Flat Response!

The Audio-Technica AT4021 is versatile small-diaphragm condenser microphone that's perfect for both the studio and the stage. The AT4021's cardioid pickup pattern helps to improve isolation of your sound source, and an onboard switch lets you choose between a flat response, or a rolled-off response at 80Hz, to eliminate low-frequency rumble. It's a good choice for miking acoustic guitars or for using as a drum overhead microphone. Essential accessories, including a stand clamp, a windscreen, and a protective carrying case, are included with the Audio-Technica AT4021 small-diaphragm condenser microphone.

Related Videos: AT4021 Small-diaphragm Condenser Microphone

Audio-Technica AT4021 Small-diaphragm Condenser Microphone at a Glance:
  • Studio and stage-worthy microphone, great for acoustic guitar and drums
  • 10dB pad and 80Hz highpass filter, for tailoring the AT4021 to the source

Studio and stage-worthy microphone, great for acoustic guitar and drums
A member of Audio-Technica's rugged 40-series microphones, the AT4021 is a worthy choice for both stage- and studio-miking needs. It features a cardioid pickup pattern for excellent sonic isolation from other instruments, and its low self-noise keeps it usable in critical studio applications. You'll find the AT4021 to be an especially good choice for miking acoustic guitars, as well as for using as drum overhead microphones, in a pair.

10dB pad and 80Hz highpass filter, for tailoring the AT4021 to the source
The Audio-Technica AT4021 lets you tailor its response to whatever source you happen to be miking. Already, it features high SPL handling - 146dB - and, with its 10dB pad engaged, you can comfortably handle sources up to 156dB SPL, without distortion. This makes the AT4021 especially useful in drum-miking situations. What's more, an onboard highpass filter at 80Hz helps to take out the muddy low frequencies, giving you a cleaner sound when recording more articulate, high-frequency-emphasized instruments.

Audio-Technica AT4021 Small-diaphragm Condenser Microphone Features:
  • Polar pickup pattern: Cardioid
  • Frequency Response: 20Hz-20kHz
  • Low-frequency Roll-off: 80Hz, 12dB/octave
  • Open Circuit Sensitivity: -34dB (19.9mV) re 1V at 1 Pa
  • Impedance: 250 ohms
  • Maximum SPL: 146dB SPL, 1 kHz at 1% T.H.D.; 156dB SPL, with 10 dB pad (nominal)
  • Self-noise: 14dB SPL
  • Dynamic Range (Typical): 132dB, 1kHz at Max SPL
  • Signal-to-noise Ratio: 80dB, 1kHz at 1 Pa
  • Switches:Flat, roll-off; 10dB pad
  • Weight: 4.2 oz.
  • Dimensions: 5.67" long, .83" maximum body diameter
  • Output Connector: Integral 3-pin XLRM-type
  • Included Accessories: AT8405a stand clamp for 5/8"-27 threaded stands; windscreen; protective carrying case
  • Requires +48V phantom power
Choose the Audio-Technica AT4021 for a focused pickup pattern and flat response - on the stage or in the studio!

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Additional Media

AT4021 Spec Sheet
Studio Microphone Buying Guide

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Tech Specs

  • Microphone Type: Condenser
  • Polar Pattern: Cardioid
  • Diaphragm Size: 0.64" (16.3mm)
  • Frequency Response: 20Hz-20kHz
  • Max SPL: 146dB (156dB w/Pad)
  • Output Impedance: 250 ohms
  • Signal to Noise Ratio: 80dB
  • Self Noise: 14dB
  • Low Cut Filter: 80Hz (-12dB/octave)
  • Pads: -10dB
  • Connector: XLR
  • Weight: 0.26 lbs.
  • Manufacturer Part Number: AT4021

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Customer Reviews

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quiet true sound

Can't Recommend more - acoustic guitar through all frequencies. Ultra quiet.
by Sweetwater Customer on
Music background: Recording artist, Solo big stage EU, Chappell/Warner...

Great Acoustic Mic

Did a shootout of mics including the AT4021, Rode NT5, Josephson C42, AKG C 451 B, Telefunkin M60, Bock 195. The AT4021 won by far. More focused, clarified sound. Overall character of the sound was awesome. Captured the sound of my Martin 000-17sm perfectly.
by Alan on
Music background: Songwriter/Producer

Audio-Technica AT4021 for acoustic guitar

Great mic for acoustic, it brings the shimmer and sparkle.
by Sweetwater Customer on

Best Acoustic Mic ever

I always loved the mojo of the 2021 but it had the nastiest noisefloor at 19 db!! This baby has less noise than the SM81 but it just has a better coloration (though still very flat response) and just brings that magical presence out in string noise/harmonics that NEVER gets annoying. Amazing Mic (try on toms too)
by Jeremy Persinger from Union, KY on
Music background: Chief Engineer at the STudio of Light

AT4021

The only reason that I'm giving this mic a 4.5 and not a 5.0 is that I wish the pad, & response switch wasn't inset. Now to the meat and potatoes. I bought this mic for acoustic guitar in my studio. Upon opening the box, I'll say that the build of this mic is solid. Doesn't feel lightweight and cheap.The sound is fantastic. I play a Breedlove so was looking for something that would fit well with it, and this mic does all that. Very nice flat response, not too bright. Last night I mic'd up a mandolin and did a comparison against my Shure Ksm44. Myself, and the mandolin player both agreed that the AT4021 sounded better. Or maybe I should say that it did a better job capturing the mandolin. I've also used this mic for recording tambourine, and shakers, and it works great. When I was shopping for a new mic, I almost bought the more expensive AT4051, I'm glad I didn't as you get your monies worth with this baby.
by Bobby Vachon from United States on
Music background: Singer/Songwriter/Studio Owner
See also: Condenser Mics, Audio-Technica, Audio-Technica Condenser Microphones
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