I use a Fishman Loudbox 180 watt amp that has 2 input channels. The amp has a DI out for each channel and a mix out that I use to send to my in ears. I play fiddle on the other channel. My in ears have 2 channels as well, so the sound man will run a house mix to one channel and my mix will be in the other. This way I can turn myself up and down on the stage without yelling to the soundman. The Fishman Loudbox 180w will fill most medium sized venues such as the casinos I perform in, and it weighs a whopping 29 pounds. Most of the time, I don't use the amp except for the inputs and outputs, but it is nice to be able to play if something happened to the sound system. Also, I use the amp to check my sound before each performance, because I'm always earlier than the soundman, and as we all know, there are no speakers on the px-5s which is a good thing for me since I crave light weight items to take with me on a gig!