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Microphone Parts offers premium replacement capsules and circuit modification kits for microphones.

Current Microphone Parts Microphones

Mods and Repairs

Microphone Parts

Mod Kits

A “mod kit” is a DIY circuit upgrade: a prepackaged set of hand-selected parts, bundled with a detailed, full-color instruction booklet specific to each microphone model. The company currently offers circuit upgrade kits for the following models.

Universal PCB kit

The MP-V57 PCB kit fits most large-diaphragm condenser bodies, including the MCA SP-1, MXL 2006, MXL V63M, MXL 910, MXL V250, MXL V57, CAD GXL2200, MXL 2001, MXL V67/V67G. It contains a highly optimized circuit and Cardioid/Omni switch. Read more about the MP/V57 PCB kit.

FET microphone mod kits

Tube mic mod kits

Large-diaphragm replacement capsules

The company offers six large-diaphragm replacement/upgrade capsules, modeled carefully after the European originals:

  1. RK-47 - a 34mm, dual-diaphragm, single-backplate capsule that recreates the sound of the Neumann K47 capsule.
  2. RK7 - a 32mm, dual-diaphragm, single-backplate capsule that provides a second interpretation of the K47 sound. Although slightly smaller in diameter, the capsule uses a heavier (6-micron) diaphragm, giving it a darker sound more reminiscent of vintage microphones.
  3. RK-12 - a 34mm, dual-diaphragm, edge-terminated capsule based on the AKG CK-12. This capsule has received glowing reviews for vocal applications, and provides an affordable upgrade for C12-like tube mic mods (e.g. the Apex 460).
  4. RK-67 - a 34mm, dual-diaphragm, dual-backplate, center-terminated capsule like the Neumann K67.
  5. RK-87 - a second version of the K67, made with 3-micron diaphragms and insulated backplates. This capsule was introduced to satisfy the DIY U87 builders; its internal design accommodates the 40V bias voltage in the original U87i circuit. But the capsule has become a favorite upgrade option for all styles of microphones.
  6. K67LE - a 34mm K67 derivative that is a sonic hybrid of the K47 and K67 styles. It has a milder high-frequency peak than the RK-67, and a broad mid-frequency boost not usually associated with the K67 design.
  7. Selected Mods and Repairs