G.R.A.S. OP0026 Kit for Frequency Calibration of 1/4" Surface Microphones


For frequency calibration of G.R.A.S. 1/4" precision surface microphones, you will in addition to a G.R.A.S. 14AA Electrostatic Actuator Amplifier need an Electrostatic Actuator and a holder. These are included in the G.R.A.S. OP0026 kit.

Performance & Warranty

G.R.A.S. 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.

Included items


Electrostatic Actuator for 1/4” Surface Microphone Sets


Actuator Calibration Holder for 1/4" Surface Microphone Sets