Microphone works great, in great shape, there is a dent in the from of the grill, not sure how it got there as I recieved it already dented. Case Included.


Single Layer Headbasket Mod -

Like all Michael Joly Engineering microphone upgrades, the MJE-K47 mod suite for the MXL 990 starts with my signature single layer headbasket. A completely new headbasket replaces the stock, multi-layer basket to dramatically increase open area to reduce internal reflections and coloration. You’ll hear clearer, less “boxy” and more detailed sound with more accurate transient response – hallmarks of the classic AKG C12 – itself a single layer headbasket design.

MJE-K47 Capsule Upgrade -

Classic sound – plus, is within reach. The 3 micron MJE-K47 capsule was designed to track an actual Neumann K47 capsule through the important midrange then provide an extra touch of “air” at the very top end. You’ll hear the classic mid-focused vocal punch of the K47 design with just a bit of modern sheen on top. When this frequency response extension is translated to the time domain, you'll hear faster and more accurate transient response as well. Faster, more accurate transient response means greater detail and resolution – without the need for a high frequency EQ boost and its accompanying phase shift. Also, replacing the stock small diaphragm capsule with the more sensitive MJE-K47 large diaphragm capsule improves this mic's S/N ratio as well.


Michael Joly Engineering Modified MXL 990 with MJE-K47 Capsule (red) vs. U 87ai (black)
Note extended high frequency "air" provided by the 3 micron diaphragm MJE-K47 capsule

Premium Electronics Modification -

The circuit used in the MXL 990 is a close approximation of a classic Schoeps transformerless design. But to save on production costs in the stock mics, inexpensive poor-sounding ceramic and under-sized capacitors are used in critical signal path locations. The MJE-K47 Mod Suite attacks these compromises by substituting components and topology pioneered in my field proven (over 6500 units in use) Premium Electronics modification. These component upgrades improve bass response and reduce graininess and mid-to-high frequency distortion while providing a smoother top end sound.