We’ve bought the Marpac 580 SleepMate white noise sound conditioner for review. We then ran it for a few months in the bedroom, without ill effects. Excellent, EXCELLENT sleep aid ! The Marpac 580A SleepMate sound conditioner offers the best white noise sound of the devices tested. It has similar white noise sound to the dual-speed SleepMate 980A, reviewed … Continue reading Marpac 580 SleepMate Review