Hello Edgar, I have attached a link below to the user manual, you will find more information regarding electrical requirements here.
http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=US&CttFileID=6897644&CDCttType=UM&ModelType=C&ModelName=HW-M550/ZA&VPath=UM/201709/20170907112534085/HW-M550_ZA_FULL_170830.pdf
^Britt