broadband speaker 5gdsh-4-4. old speaker

radio antique soviet broadband paper stamped 5gdsh44 5gdsh woofer speaker vintage acoustics symphony old cases speakers retro 1960s 60s 70s helmholtz resonator threeway system fabric veneer plywood strut ussr recording studio sing shielding art award classic play cast cap wave archive home dj reportage microphone singer disco broadcast chart song varnished