Cross the river at the RMK Pähni Nature Centre, then take the first road left just before a stretch of forest. After a while, you'll spot the megaphones through the trees on your left. The walk from the Nature Centre takes about 10 minutes, but the spot is also accessible by car.
Coordinates: Long-Lat WGS 84 x:26.75534 y:57.62998
L-EST 97 x:664578 y:6390903