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Pair of PHILIPS Motional Feedback (MFB) Loudspeakers model 22RH541 https://www.pinterest.com/0bvuc9ca1gm03at/ | Âm thanh
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Servobass Demonstrates Motion Feedback Desktop Subwoofers and Other MFB Solutions at CES 2023 | audioXpress
Philips Motional Feedback loudspeaker tales - UK Vintage Radio Repair and Restoration Discussion Forum
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