does anyone know at about what time jbl switched to the metal sliders in preference to the white plastic ones ? I have one with a serial number of 11,450 (5547a) that does have the metal sliders , can anyone hone it down any further than that ?
does anyone know at about what time jbl switched to the metal sliders in preference to the white plastic ones ? I have one with a serial number of 11,450 (5547a) that does have the metal sliders , can anyone hone it down any further than that ?
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