Make your Speedwoofer 10S MKII wireless with RSL’s AT-4 wireless transmitter. Good for up to 50ft. Going wireless makes installation and finding the right location, a breeze. The signal does not require “line of sight” connection and should fit into environments without issue. Going wireless does not sacrifice sound quality. Keep in mind that you can use a single AT-4 transmitter to connect up to (4) Speedwoofers simultaneously! Best of all, the AT-4 is backwardly compatible with AT-3 generation 10S Speedwoofer models. Includes audio cables for LFE and pre-out connections Line of sight communication recommended for optimal performance Backwards compatible with 10S original (Feb – Dec 2021 productions) $10 flat return fee per AT4 within the 48 states