Finished Rebuilt MXL 990 With 991 SDC


  • Options Price: $0.00
  • Product Price: $309.00
  • Total: $0.00
SKU: 990991uf Categories: ,


A Fully Rebuilt Transformerless 990 and an Unmodified 991 SDC as a bonus!

We replaced the tiny capsule in the 990 with a k47 style LDC. The electronics are replaced with our own jaSb all-discrete circuit with optional internal pattern switch.

Harsh, sibilant high-end becomes smooth and silky. Thin bottom end becomes full. In the middle is a great harmonic richness that works well on almost anything you throw at it.

The 990 the great sound and performance of any of our other transformerless builds.

  • k47 Style Large Diaphragm Capsule
  • jsSb Circuit Board with optional internal pattern switch (omni/cardioid)
  • Matte Red paint finish

The 991 is stock and unmodified.  Comes with MXL hard case and hard-mounts for both mics.


  • Mic-Parts improved headbasket for the 990 (looks better, sounds better)
  • Boseen Spider Style Shockmount (there is no stock MXL shockmount)


  • Internal pattern switch is accessed by unscrewing the body cylinder.  In omni mode the signal level of the mic decreases about 6dB.
  • The Mic Parts Headbasket does not have a Cardioid Emblem on the front as seen in some photos
  • The 991 can drastically improved by swapping the capsule with a SDC capsule from mic-parts.

Contact me if you have any questions about the mic.

Additional information

Weight 4 lbs
Dimensions 10 × 12 × 8 in

With Standard MXL Headbasket, With Mic-Parts Headbasket


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