RMweb Premium boxbrownie Posted May 26, 2020 RMweb Premium Share Posted May 26, 2020 It may be obvious or it may not work at all but I have an old Loksound 3.5 which needs the 100 ohm type speaker, but I have a lot of the newer 4, 6, 8 ohm type speakers, now I was wondering if I can just put a resistor on one of the speaker wires (or one on each wire) to change the impedance......or does it not work as simply as that? Link to post Share on other sites More sharing options...
Pandora Posted May 26, 2020 Share Posted May 26, 2020 (edited) You could place a resistor value R in the output circuit so that (ohms of speaker + R ) == 100, but the practicality is the sound output would be very low in volume, 90% of the output power would be used by ( or dissipated) i n the resistor and only about 10% of the power would be left over to do the "job-of-work" ie make the desired steam / diesel / electric locomotive sound Edited May 26, 2020 by Pandora 1 Link to post Share on other sites More sharing options...
RMweb Premium boxbrownie Posted May 26, 2020 Author RMweb Premium Share Posted May 26, 2020 17 minutes ago, Pandora said: You could place a resistor value R in the output circuit so that (ohms of speaker + R ) == 100, but the practicality is the sound output would be very low in volume, 90% of the output power would be used by ( or dissipated) i n the resistor and only about 10% of the power would be left over to do the "job-of-work" ie make the desired steam / diesel / electric locomotive sound Aha now you have explained that of course, it makes perfect sense........oh well, dig out an old 100ohm speaker then. Link to post Share on other sites More sharing options...
Pete the Elaner Posted May 26, 2020 Share Posted May 26, 2020 16 minutes ago, Richard Croft said: What would happen if you put a 100 ohm speaker in series with an 8 or 4 ohm speaker? I've wondered for a while if it could work, would work, Could you keep the original 100 ohm speaker but then use a better quality more modern speaker to improve the sound? Richard It would be very quiet. I doubt you would be able to hear the 4/8ohm speaker. Link to post Share on other sites More sharing options...
RMweb Premium boxbrownie Posted May 26, 2020 Author RMweb Premium Share Posted May 26, 2020 2 hours ago, Richard Croft said: What would happen if you put a 100 ohm speaker in series with an 8 or 4 ohm speaker? I've wondered for a while if it would work, Could you keep the original 100 ohm speaker but then use a better quality more modern speaker to improve the sound? Richard That was exactly was my thoughts originally, but as Pandora explained it the resistor would be taking the majority of the “action” and the speaker hardly any. Its all this electrickery, it really is! Link to post Share on other sites More sharing options...
Free At Last Posted May 26, 2020 Share Posted May 26, 2020 1 hour ago, boxbrownie said: Its all this electrickery, it really is! Mayhap brother, mayhap. 1 Link to post Share on other sites More sharing options...
RMweb Premium boxbrownie Posted May 26, 2020 Author RMweb Premium Share Posted May 26, 2020 1 hour ago, Free At Last said: Mayhap brother, mayhap. Lookee like me nayboor Link to post Share on other sites More sharing options...
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