I just bought a new pf500 and I love it! I do have one question if anyone can help: I like to play along with streamed lessons and my own playlist on an iPhone. I’m not getting any output from my speakers when I plug into the aux input. Has anyone else experienced this? I have not tried headphones and was wondering if the aux input is only output from the headphone jack...I hope that’s not the case! Any input would be appreciated!