After the M2s Pro DIY earbud model, Smabat came with an advanced version in the IEM form. Smabat Proto 1.0 is specifically designed for earphone developers and enthusiasts. Control treble damping Bass control damping Earphone main body Drive unit module Acoustic sealing ring Rear cavity breathable cover Classic A/B cavity acoustic structure A/B cavity is the most commonly used acoustic structure of in-ear earphones. 99% of in-ear headphones use this acoustic method for tuning. It uses the same acoustics principle. … Continue reading Smabat Proto 1.0 DIY Earphone