IIRC, subs use ELF or ULF. My understanding is that some of the older subs could trail a long wire antenna behind them. It'd seem to me that the bandwidth for

IIRC, subs use ELF or ULF. My understanding is that some of the older subs could trail a long wire antenna behind them. It'd seem to me that the bandwidth for such would be abysmal. Is this correct? I did take some EE courses but that was like forty years ago. All I have ever done with that is receive. I should probably learn more.