MU5T4N6 Posted September 7, 2018 Share Posted September 7, 2018 Hi, Â I have the 63902 Alco RS-3 CP #8438. The sound itself is excellent, however the speaker has started to rattle and sound cheaply which is why I want to replace the speaker with a new/better one. I cannot find any info though, about what speaker I need. I don't want to get one with the wrong resistance and destroy the decoder. Does anybody know what speaker is installed? Link to post Share on other sites More sharing options...
Zomboid Posted September 7, 2018 Share Posted September 7, 2018 Can you not just put a meter on ohms across the speaker? (Disconnect it from the board first) Was what I always used to do with guitar cabs where the label was either missing or uninformative (more important with valve amps as they're tuned for a particular output, rather than a minimum, but I'll eat everyone's hat if there are valves in a model loco audio...) Link to post Share on other sites More sharing options...
MU5T4N6 Posted September 7, 2018 Author Share Posted September 7, 2018 Can you not just put a meter on ohms across the speaker? (Disconnect it from the board first) Was what I always used to do with guitar cabs where the label was either missing or uninformative (more important with valve amps as they're tuned for a particular output, rather than a minimum, but I'll eat everyone's hat if there are valves in a model loco audio...) I'll try that when I get home. I just wasn't sure if that would work if the speaker is faulty. Link to post Share on other sites More sharing options...
long island jack Posted September 7, 2018 Share Posted September 7, 2018 The sound value chip are by soundtraxx which use 8ohm speakers Link to post Share on other sites More sharing options...
Prof Klyzlr Posted September 8, 2018 Share Posted September 8, 2018 Dear Max,  For a replacement speaker, I strongly reccomend checking out the offerings by Scale Sound Systems https://www.scalesoundsystems.com/  These have been designed by a Professional Audio Engineer (who's also a serious model RRer),and have been consciously and empirically designed with a flatter/more-even frequency response,with both audibly and measurably more bottom-end. They are also engineered as-far-as-possible to "drop-in fit" into specific models, making upgrade as easy as possible.  I can't see a specific-B'mann-RS-3 offering (yet),but there are B'mann S2/4(switcher) https://www.scalesoundsystems.com/product-page/Bachmann-sound-value-s2-s4   and Atlas RS-1 offering, https://www.scalesoundsystems.com/product-page/atlas-master-rs-1   which could well be a simple tweak to match... (worst case, send SSS main-man jt burke an email asking about a B'mann RS-3 offering...)  Happy Modelling,Aim to Improve,Prof Klyzlr 1 Link to post Share on other sites More sharing options...
MU5T4N6 Posted April 11, 2019 Author Share Posted April 11, 2019 I do apologize for the late reply, thank you guys for your replies! Link to post Share on other sites More sharing options...
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