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Wide CardioidMXL 991

Wide Cardioid Pencil Condenser Microphone

The MXL 991 is a small-diaphragm condenser mic with a fixed cardioid (described by MXL as “wide cardioid”) pickup pattern.

The gold-sputtered diaphragm is 6 microns thick and measures 20mm in diameter. The capsule, and in fact the circuit design, match the MXL 603S, although the vendor’s published frequency charts describe the 991 as a much brighter mic, with a +3dB point at ~5k and +5dB at ~9k.

The 991 is no longer sold on its own, but is now bundled with the 990 condenser in the MXL 990/991 Studio Package.

The mic ships with a standard mic clip. A suspension shockmount is available separately; look for p/n MXL-41-603.

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Frequency Response - Wide CardioidClick Graph to Compare!
991 Wide Cardioid Frequency Response Chart
Pickup Patterns Pads & Filters
Wide Cardioid (15 mV/Pa; 30 - 18,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 20mm
Diaphragm gauge: 6 microns
110 Ohms (Low) Max SPL: 137 dB
Self-noise: 18.0 dB(A)
Weight Length Max Diameter Interface(s)
159g (5.61oz) 134mm (5.28'') 22mm (0.87'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48 ± 4v

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