inputs.text: firmware update - major software glitch occured many kdcmodels manufactured prior middecember 2012i assume kenwood applied patch 2013 models original review datei posted following several kenwood head units little unethical people seemed like record models kdcbt952hd kdchd552ustill updating software not bad idea find proper update users manual model here[ ] two things addi still get \\all audio output lost\\ bug plug ipod startup mode either plug ipod turning key wait unit fully primedif dig \\pro settings\\ menu option save pro settings works even battery disconnected store several different pro setups \\pro setup\\ \\preset\\ \\memory\\original review july 1 2013this excellent unit large feature set available excellent price however appears kdc model groups manufactured pre2013 suffer software glitch occasionally causes audio output lost hit reset button fixes problem youll reset settings permanent fix update firmware version four version fivesoftware update worked great also solved equalizervsbluetooth glitch eq would flatten every time bluetooth activated two separate updates one overall system one ipodbluetooth might not need somewhat complicated procedure burn firmware onto cd takes full hour solve problems also made ipod navigation bit easier heres page [ ] still would nice flash memory stored settings disconnect cars battery piddling quibble drawback unit make cheatsheet get back preferred settings correctly theres lot settings unit many featuresin news polk speakers found sound quality amplifier flawless sources volumes great choice not plan use secondary amplification amp turned powerthe microphone bluetooth phone also excellent kind noise canceling tech people end phone cant tell windows open not 55 mph big surprise good ive used others sound hollow tinny microphone gets tiptop ratings appear directional pointed directly mouth unit voice recognition dial phone handsfree hitting one buttonipod navigation takes couple days learn great know quirks unit two modes operate ipod one stops ipods buttons working connected second allows ipod control radio ipod set flexible mode much happierhdradio greati not used pandora musicthrubluetoothin summary software glitch seems reason prices low kdc models problem solvable place not afraid perform little extra tech support get great deal great unit price half msrp rarely achieved bargain premium unit