HB a mano electroerosion

Heligon bass produced by electroerosion technology from Dural Al with hardness 160 HB, thickness 10 – 14 mm, with total air gap 0,16 mm. The shape of the channel in the tip follows the angle of oscillation of the reed. The underside of the channel is widened by 0,04 mm. The reed is made of Swedish sound steel with a width of 8 – 9 mm.