I bought my cat a robot dog for Xmas. He loves it! I currently have taken it apart to clean some accumulated hair out from around some of the rotating parts. It plays music that is kind of loud and shrill and annoying. If I removed the speaker from the circuit, would I need to replace it with a diode to produce a voltage drop similar to the induction of the speaker? Does the voltage drop of a speaker change with the amount of sound being produced. Do speakers produce a voltage drop when they are idle? Am I just speaking a bunch of gibberish due to my lack of knowledge on the subject? Do I need to provide more information in order for my questions to be answered?
As Jay suggests usually the loadspeaker can be disconnected and the device will continue to otherwise work, else a resistor will usually make a good replacement and you probably don't neet to be exact, use a 33 ohm resistor to replace a 32 ohm loudspeaker, or 3.9 ohm to replace 4 ohm loudspeaker etc.