I have a Digitrax SF004 Soundbug Decoder, that comes with a 28mm 32 Ohm speaker.
I want to put it in a Proto 2000 GP20, but the speaker is too big!
I checked on line and cannot find a 32 Ohm speaker that is small enough to fit in the loco.
I know that there are 8 Ohm mini sugar cube speakers, but are there 16 Ohm speakers available, this way I can connect two in series and stay within the 32 Ohm guide that is recommended for the SF 004 Soundbug.
I don't know what is available regarding speakers but you have the right idea. Two 16 ohm speakers in series will present a 32 ohm load to the amplifier. Four 8 ohm speakers in series will also present a 32 ohm load.
Check the specs on the Digitrax decoder as it might be able to handle a 16 or even 8 ohm load. If so, it should be easy to come up with a speaker combination that will work. Never connect a single 8 or 16 ohm speaker to an amplifier rated for a 32 ohm load as it can overheat and eventually destroy the amplifier.
Hornblower
hornblower I don't know what is available regarding speakers but you have the right idea. Two 16 ohm speakers in series will present a 32 ohm load to the amplifier. Four 8 ohm speakers in series will also present a 32 ohm load. Check the specs on the Digitrax decoder as it might be able to handle a 16 or even 8 ohm load. If so, it should be easy to come up with a speaker combination that will work. Never connect a single 8 or 16 ohm speaker to an amplifier rated for a 32 ohm load as it can overheat and eventually destroy the amplifier.
Here is a question derived by ignorance what would the effect be of wiring a 16 Ohm Speaker in line with a 16 ohm resistor to achieve the 32 Ohm of resistance in this situation?
DRGWGJCOwhat would the effect be of wiring a 16 Ohm Speaker in line with a 16 ohm resistor to achieve the 32 Ohm of resistance
I guess in theory this would work but you'd better use a high wattage resistor as this is bound to create lots of heat.