Seeing as I found the sounds of the cab car to be too quiet with the usual background noise of the museum, I will be working on building an audio amplifier/booster for the speaker. The volume is already maxed out on the decoder (horn and master volume), so I am looking for around a 1-1.5 watt boost in power to the speaker (the peak power is 4 watts for the speaker). The decoder has a max power output of 2 watts for the speaker. Anyone have any suggestions for an amplifier circuit for this application?
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