I would like to take some of my props and cut the leads to the speakers and plug them into an amplifier to use with better speakers. I have had mixed results. it seems like all the Gemmy props get distorted when I try this. Some other proms sound fantastic. I assume that there is an amp in the ones that don't work that has too much gain to be further amplified? Is there some sort of buffer I can build that will fix this situation?