Does it have (dried) ferrofluid? Did you check the (electrolytic) crossover capacitors?
Surface rust shouldn't be a problem, it just indicates a high age which is correlated to problems related to the points above. 😉
Surface rust shouldn't be a problem, it just indicates a high age which is correlated to problems related to the points above. 😉
That shows a high humidity ambient.
Besides reddish iron oxide, the whole back plate (not exactly the *magnet* which is ceramic and thus rustless) zinc covering has turned into white dust, I can even see some flakes.
Not a big problem on the back, you may wipe it a couple times with a wet cloth to remove most of it and then paint over with some "converter" paint, the one which besides colour provides rust resistance, but I might be more worried that same conditions exist inside the tweeter ... and the woofer too, they all "live" in the same enclosure which I guess must smell of humidity, even mold.
Are you near the Sea?
IF same white dusty coating appears around the voice coil polepiece, it will definitely affect sound, and speaker must be replaced; reconing won´t solve the basic problem.
Besides reddish iron oxide, the whole back plate (not exactly the *magnet* which is ceramic and thus rustless) zinc covering has turned into white dust, I can even see some flakes.
Not a big problem on the back, you may wipe it a couple times with a wet cloth to remove most of it and then paint over with some "converter" paint, the one which besides colour provides rust resistance, but I might be more worried that same conditions exist inside the tweeter ... and the woofer too, they all "live" in the same enclosure which I guess must smell of humidity, even mold.
Are you near the Sea?
IF same white dusty coating appears around the voice coil polepiece, it will definitely affect sound, and speaker must be replaced; reconing won´t solve the basic problem.
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