K870 Capsule 34MM 4 Wires U87 AI Repair DIY Microphone
$89.99piece
Gold-plated large diaphragm K870 Capsule 34MM 4 Wires, DC bias voltage 4 wires U87I Repair or DIY condenser microphone
Specification:
Model: K870 capsule
Product Name: K870 Capsule 34MM 4 Wires
Type: DC bias voltage
Voltage: DC25V-80V
Diameter: 34MM
High voltage: 12MM
Design reference sample: NEUMAN K870
Used for making and repairing condenser microphones, 4-wire can be used to make microphones with multiple directions. Replace and repair the old NEUMANN U87I capsule, which has perfect sound quality and does not produce excessive high frequencies.
Features:
Double sided pickup, four wires completely independent
circuit diagram:


Important Usage Notes for Gold‑Plated Capsules:
Do not touch the internal diaphragm. Handle only by the metal backplate.
Protect from moisture. When not in use, store the microphone in a sealed container in a relatively dry environment.
A preamp circuit board is required. The capsule needs a polarization voltage between 3V‑70V provided by a preamp board. Connecting it directly without a preamp will produce no sound.
Packing:
1pc 34mm capsule+ stand
Application:
Accessories for DIY condenser microphone, repair microphone, or upgrade mic.
Click here to order “48v Phantom Power“.
Click here to order “Installed Microphone”
Welcome to a store built on 15 years of audio engineering expertise. Every product—from our capsules to our circuits—is designed, tested, and perfected by me, a senior engineer, to deliver pro-level sound you can trust. Ready for more? Explore our full range or reach out for custom solutions—we’re here to help you sound better.

| Weight | 0.2 kg |
|---|---|
| Dimensions | 10 × 10 × 10 cm |
| Option |
A ,B |
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