the separation frequency bushes of symphony 2 acoustic system

radio old caps capacitor acoustics electrolyte filter crossover separation frequencies damper distortion 3d1 midfrequency cotton wool pass cardboard cases speakers symphony retro 1960s 60s 70s helmholtz resonator threeway system fabric veneer design hipster wooden recording studio soviet voice rock monitoring classic listening eavesdropping report music speaker play audiophile commentator rap broadcasting