InfoComm 2019: Zero-Ohm Systems’ MS-2R and MS-4R Passive Devices Connect Multiple Speakers to AmpsJune 17, 2019 | Home / June 17, 2019 rave-video / InfoComm 2019: Zero-Ohm Systems’ MS-2R and MS-4R Passive Devices Connect Multiple Speakers to Amps InfoComm 2019: Zero-Ohm Systems’ MS-2R and MS-4R Passive Devices Connect Multiple Speakers to Amps