Building your own U87-style condenser microphone is a rewarding project that combines professional sound quality with hands-on craftsmanship. This guide walks you through the process—from selecting components to final calibration—empowering you to create a studio-grade microphone at a fraction of the commercial cost.

Why Build a U87 Clone?
The Neumann U87 is an industry-standard microphone known for its smooth vocal response and versatility. A DIY version lets you achieve comparable sound while learning the technical foundations of microphone design.

What You’ll Need:

  • U87-style large-diaphragm capsule (34mm gold-sputtered recommended)
  • FET-based circuit board (with transformer output for authentic tone)
  • Microphone body with internal shock mount
  • XLR connector, internal wiring, and mesh grille
  • Basic tools: soldering iron, screwdrivers, wire cutters, multimeter

Assembly Steps:

  1. Prepare the Circuit Board – Solder critical components like capacitors and transistors following the schematic. Pay attention to polarity and grounding.
  2. Install the Capsule – Carefully mount the capsule to the circuit board, ensuring secure and stable connections.
  3. Assemble the Body – Fit the circuit into the microphone housing, route wiring neatly, and attach the grille and shock mount.
  4. Test & Calibrate – Connect to 48V phantom power, check for noise, and verify frequency response using test recordings.

Pro Tips:

  • Use high-quality components (WIMA capacitors, low-noise transistors) for optimal performance.
  • Seal internal joints to prevent microphonic interference.
  • Allow the circuit to stabilize for 24 hours before final testing.

Troubleshooting Common Issues:

  • Hum or Noise – Check grounding and shielding.
  • Low Output – Verify phantom power and solder joints.
  • Unbalanced Frequency Response – Re-examine capsule alignment and circuit calibration.

Building a U87-style microphone not only saves costs but also deepens your understanding of audio engineering. With patience and precision, you’ll own a professional tool tailored to your sonic preferences.