Try an oneac power conditioner. a CL1102
(2 amp) should cover both cabinets. they were required on all Executone installs. IDS systems were sensitive to power problems. The only thing it will not fix is a momenetary power outage, you will need a UPS for that. a cheap way of determining if you have this problem is plugging in an alarm clock and see if it resets to 12:00 due to a power outage. if so, buy a small UPS. plug the Oneac into it and the system into the oneac.