div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: MFA Luminescence at AllegroSound · Luminescence A-4: early 1988 All critical audio circuit resistors changed to Resista types intermediate output coupl ing capacitor deleted from src=https:reader030vdocumentsusreader030viewer20220130236004e747af8e8f776f662763html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: MFA Luminescence at AllegroSound · Luminescence A-4: early 1988 All critical audio circuit resistors changed to Resista types intermediate output coupl ing capacitor deleted from src=https:reader030vdocumentsusreader030viewer20220130236004e747af8e8f776f662763html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: MFA Luminescence at AllegroSound · Luminescence A-4: early 1988 All critical audio circuit resistors changed to Resista types intermediate output coupl ing capacitor deleted from src=https:reader030vdocumentsusreader030viewer20220130236004e747af8e8f776f662763html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdiv