Tkwesa

The newer models of these can be converted to accept 220v 50hz unlike previously produced models. I compared the old power board to the new one and it's different. Inside the sub, the power board has been updated to accept a 110v 220v switch but it is not wired in. To change to 220v simply remove the jumper wire on the board labeled 110v/220v. I tested this on 110 and 220 and it works. https://imgur.com/a/xqu7dJr