Buy Sound Calibrator Adapters (MM1, 1/4", Bedrock, NTi, UMIK)
Precision-machined adapters to fit non-standard measurement microphones (1/4", Beyerdynamic MM1, Bedrock SM50, NTi M4260, Audix TM1) snugly into standard 1/2-inch sound calibrators.
- Airtight acoustic seal inside the 1/2-inch calibrator cavity (prevents up to 10 dB pressure leakage)
- Dedicated sizes for Beyerdynamic MM1 (9.4 mm and 9.6 mm) in stock
- Custom-machined adapters (7–10 mm to 1/2 inch, Art. 7156) also available
Available Versions & Services
Current prices from Dresden stock / lab
Adaptor for Beyerdynamic MM1 Aluminium 9.4mm
Aluminum adapter for Beyerdynamic MM1 (9.4 mm diameter) to 1/2" calibrator (for 9.6 mm choose Art. 7153).
Adaptor 1/4" to 1/2"
Precision adapter from 1/4-inch (6.35 mm) measurement microphones to 1/2-inch (12.7 mm) calibrators.
Adapter Bedrock SM50/SM30 to 1/2"
Dedicated adapter for Bedrock SM50 / SM30 / BAF210 microphones to standard 1/2-inch calibrators.
3-Step Procedure
1. Check Microphone Diameter
Select the adapter below that matches your microphone capsule diameter to 1/2 inch (12.7 mm).
2. Add to Quote
Add the adapter (and optional calibrator) to your quotation with one click.
3. Fast Shipping
All standard adapters are in stock in Dresden for immediate dispatch.
Why Beyerdynamic MM1 Microphones Require Either 9.4 mm (Art. 7151) or 9.6 mm (Art. 7153)
Click to expand technical details and standard references
Why Beyerdynamic MM1 Microphones Require Either 9.4 mm (Art. 7151) or 9.6 mm (Art. 7153)
Click to expand technical details and standard references
The Beyerdynamic MM1 does not have a standard 1/2-inch or 1/4-inch capsule tip; depending on the production batch, its head diameter measures between 9.3 mm and 9.55 mm. A standard 1/4-inch adapter (6.35 mm) will not fit over it, while holding it loosely inside a 1/2-inch (12.7 mm) calibrator leaks acoustic pressure. Simply check your MM1 tip with calipers: up to 9.35 mm use Art. 7151 (9.4 mm bore); up to 9.55 mm choose Art. 7153 (9.6 mm bore).
Tested Lab Quality & 24-Month B2B Warranty
Every new and certified refurbished unit passes our quality inspection routine in Dresden prior to delivery. Individual factory calibration certificates for ISO 9001 audits are available upon request.