Query failed: connection to localhost:9312 failed (errno=111, msg=Connection refused). loudspeaker output power or rating - iPhone Discussions on AppleInsider Forums Toggle navigation All Forums Recent Posts Sign In loudspeaker output power or rating perigalacticon Posted: September 10, 2017 4:47PM in iPhone I'm working on an electronic toy project I'm interested to know what is a typical smartphone loudspeaker power output rating (i.e. 1W, 3W ?) for reference? Sign In or Register to comment.