Hi everyone,

Recently I've purchased a Dunlop Heil Talk Box off of eBay. I was practicing with my band yesterday and couldn't get it to work. It will act as a bypass when turned off but when I try to turn it on, there was nothing coming out of the tube.

I had it hooked up as so: Guitar>Effect chain> Marshall MG100HCFX> Talk Box> Marshall MG412B. I did have the tube next to a microphone.

Does anyone have any suggestions on what could be wrong?

Thank you in advance!