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Philips "fish eye" amplifier. Appr 1976. And the famous Motional Feedback ( mfb)-speakers, great product from Philips sound engineers in the seventies. No… | Anni 50
Philips Model RH-532 Motional Feedback Speaker System (Apr. 1975)
Motional Feedback in Loudspeakers (Aug. 1975)
Philips RH 545 Studio | Inner Magazines
Philips MFB 567 speakers : r/vintageaudio
Philips Motional Feedback Speakers
Motional feedback intro
Servo-Control in Mainstream Audio: From Motional Feedback to the Bend-Sensor | audioXpress