An FC mag puts heat around the VC something you don't want. It adds needless complexity and for some strange reasons sounds the best powered by a Tungar DC power supply. The older FC designs were overbuilt but I wonder if the heating-cooling cycles an FC produces would affect the longevity of the FC in modern FC transducers. That being said FC, Alnico, rare earth, Iron ferrite mags all can sound fine depends on the overall design of the transducer and imprementations when used in a finished loudspeaker.
Speaker magnets
Three questions:
1) The coil in a speaker when fed with current from the amplifier will produce its own magnetic field, presumably 4 layer coils more so. Over time does this ever have any effect on the characteristics of the speaker magnet?
2) Modern speakers have massive magnets compared with most vintage speakers. What advantage do they give a modern speaker over a vintage speaker?
3) Does the magnet in a speaker deteriorate to any noticeable amount just due to age?
1) The coil in a speaker when fed with current from the amplifier will produce its own magnetic field, presumably 4 layer coils more so. Over time does this ever have any effect on the characteristics of the speaker magnet?
2) Modern speakers have massive magnets compared with most vintage speakers. What advantage do they give a modern speaker over a vintage speaker?
3) Does the magnet in a speaker deteriorate to any noticeable amount just due to age?