The static we often associate with speakers usually relate to bad connections, the wrong amount of power being sent to the speaker or the power cord needs to be grounded. However, your speaker for your Echo Dot will usually operate without a connection, as you’ll be connecting wirelessly. Therefore, this isn’t a huge concern. If it’s not a battery driven unit (such as the Sonos) and you experience static you can change out power cords and see if the problem persists.