For sensitivity calibration of 1/4" precision surface microphones, you will in addition to a Pistonphone, e.g. GRAS 42AP, need an adapter.
This kit contains an adapter for 1/4" size, which fits into the GRAS RA0048 1/2" coupler. This coupler is included with GRAS Pistonphones.
Performance & Warranty
GRAS accessories are made of stainless steel, alloys and high-quality composites. These items are covered by a 2 year warranty respecting their intended use.
On consumables like batteries, cables and windscreens we offer a 6 month warranty.
Pistonphone Calibration Adapter for 1/4" Surface Microphone Sets