Picked these up last week, very rare & ahead of their time!Philips 532 Electronic Active speakers (with covers). Did you say you don't have an amp? No... | By Golden Era Hi
Philips Motional Feedback loudspeaker tales - UK Vintage Radio Repair and Restoration Discussion Forum
Philips - 532 Electronic (the first motional feedback - Catawiki
Philips RH-532 Loudspeaker - On Demand PDF Download | German
Philips 532 e-MFB Speakers
Plexus Records - 🔊 Outstanding Philips 532 speakers... | Facebook