The G.R.A.S. RA0048 is a Pistonphone coupler which is factory mounted on G.R.A.S. Pistonphone and they are factory calibrated as one unit. The RA0048 is used for calibration of 1/2" microphones (and together with adapters for other sizes). With this coupler a sound pressure level of 114 dB is produced.
Quality & 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 windscreen we offer a 6 month warranty.