At Venhorst in Hilversum I picked up a little NES-5 Noise Eliminating Speaker, produced by www.bhinstrumentation.co.uk and I tested it against a big vintage speaker in a bakelite body. The NES-5 uses Digital Sound Processing to filter noise and crackling sounds from the input while keeping voice sounds and morse intact. The NES-5 needs 12-28V DC power to operate. I connected them to the 1946 RCA Radio Holland "Koningin Emma" AR-88 which has very little noise improvement on board. In my view, the vintage speaker looks best, the little 'modern' speaker sounds better. (There are more advanced speakers by the same manufacturer, see for instance this video .) Comparing speakers, NES-5 and Vintage Youtube version: https://www.youtube.com/watch?v=lPfPMXH2Nnw BHI NES-5, noise cancelling, Siemens REL 445 E 311 b1b, shortwaveradio, kurzwellen Youtube version: https://www.youtube.com/watch?v=HtPjEb6bjTY folk songs from Frans Goddijn on Vim