Guitar amp as speaker

Hello everybody,

I just purchased an audio technica lpx120USB and à Sony stdr-dh190 and I have to wait a month before getting propre speakers.

I noticed I have à Phone output (Jack 6.35) on the str-dh190, can I plug it to my guitar amp and expect a correct sound while I wait for speakers ? I know it would be 2 amps so it could cause distortion ? Can it damage one of my amp ? Thank you