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OmnidirectionalCardioidHypercardioidAudio-Technica AT4049b

Detachable-Capsule Pencil Condenser Microphone

The AT4049b is a revision of the company’s earlier mic, the AT4049a. Both are transformerless “pencil” microphones that accept interchangeable capsules. The 4049 is nominally an Omnidirectional microphone, but with appropriate capsules would support other patterns.

The preamp body, part number AT4900b-48, is common to these microphones:

  • AT4900b-48 body + AT4051b-EL cardioid capsule = AT4051b
  • AT4900b-48 body + AT4049b-EL omni capsule = AT4049b
  • AT4900b-48 body + AT4053b-EL hyper capsule = AT4053b

What is the difference between the AT4049a and AT4049b?

  • The omni capsule in the ‘b’ revision matches the sensitivity of the other ‘b’ capsules. In the ‘a’ revision, the Omni capsule had ~3dB higher sensitivity.
  • The AT4049b has a less pronounced HF presence peak, but less smooth HF response overall.
  • Self-noise has been cut from 19dBA to 16dBA on the AT4049b.
  • The AT4049b includes a -10dB pad, raising the max SPL from 146dB to 155dB.
  • The AT4049b is RoHS certified (free of hazardous substances).
  • The AT4049b has better EMI/RFI shielding.
  • Impedance has dropped from 100Ω to 50Ω.
  • The ‘b’ revision is 7g heavier.

The ‘b’ series mics — the AT4051b, AT4053b, AT4049b — include two recessed switches on the mic body; one controls the pad, and the other controls the high-pass filter.

The mic ships with a clip (A-T p/n AT8405a), a foam windscreen, and a carrying case (p/n S1).

The Audio-Technica AT4049b is also known as: AT4049.

Specifications

Compatible Capsules
Audio-Technica AT4049b-ELOmnidirectional Audio-Technica AT4049b-EL
Omnidirectional capsule
Sensitivity: 19.9 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: n/a | Still In Production
Audio-Technica AT4051b-ELCardioid Audio-Technica AT4051b-EL
Cardioid capsule
Sensitivity: 19.9 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: n/a | Still In Production
Audio-Technica AT4053b-ELHypercardioid Audio-Technica AT4053b-EL
Hypercardioid capsule
Sensitivity: 19.9 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: n/a | Still In Production
Pads & Filters Impedance SPL/Noise
  • Pad: -10dB (Via Switch)
  • Filter: HPF: -12dB/octave @ 80Hz (Via Switch)
50 Ohms (Low) Max SPL: 155 dB
Self-noise: 16.0 dB(A)
Weight Length Max Diameter Interface(s)
127g (4.48oz) 155mm (6.10'') 21mm (0.83'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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