As for the vintage speaker that you have- I have one also; this used a field coil energized directly from the wall socket, and the two really soft wires go to the speaker output terminals on the radio, or amp if it were to go to a record player.
There is a copper oxide rectifier on this unit, and it is likely in need of attention/replacement depending upon physical condition.
Here is a way to restore them, but I would not trust them.
You will pretty much have to remove the speaker assembly from the cabinet in order to do any work on it, and other work will require a lot of dis-assembly of the unit in some cases.
I have not made any effort to rework mine at this time, as there has not been a great need to do so, but a silicon rectifier with a current limiting reisistor in series should work (about 2000ohms and least 10 Watt should do the trick).
The old rectifier resembles the newer selenium rectifiers used in TV sets in the fifties and early sixties.
:Hello, I have replaced the audio interstage transformers and have no sound so I checked the speaker. two of the leads measure .9 ohms. the other two are open. I would think this is still a speaker with a voice coil, field coil and an output trans(looks like output trans built right into it. The back of the speaker where the voice coil is is shaped like a philco 80 cathedral wood case. speaker says magnavox company.....oakland california on it. 110 to 190 volts. I dont really understand why the two leads that are open are each insterted into the single wire phono jacks. Phono as i understand it is for a record player? So much for a simple field and voice coil speaker....I'm not sure what to check to tell if this speaker is any good. Is there a way to connect a regular 8 ohm speaker to see if the radio even works? The output transformer measures 5.13k ohms end to end. 4.99k end to center and center to the other end is 149.2 ohms. The other side if it measures .6 ohms.