broadband speaker 5gdsh-4-4. old speaker

radio antique soviet broadband paper stamped 5gdsh44 5gdsh woofer speaker 5gd3 vintage acoustics symphony old cases speakers retro 1960s 60s 70s helmholtz resonator threeway system fabric veneer plywood strut ussr recording studio reggae audio interview acoustic speak listening home eavesdropping reportage volume varnished wave fm pop dj singer classic disc jockey sound