[Espeefan]

Jason, I'm not sure, but I do know any speaker that is an 8 ohm 12 volt speaker will work just fine with the Servonaut on the same 12 volts. You can open yourself up to some different sizes, as long as they are within spec. The only place I know in the USA that has some Servonaut electronics is Ric at PMD (Garden Trucking). I've never seen speakers listed on his website though. You could ask him.