Hey guys! I'm hoping to just get a quick answer/reassurance. I just purchased an Audio Technica Direct Drive LP120 turntable. I am running it through a vintage Pioneer SX-737. If you aren't already aware, the TT has a built in pre-amp which makes it possible to connect it to the AUX input..It sounds fine, but I feel it does effect the sound a bit. Now, here's my dilemma..Upon running it through the Phono input and switching the TT switch to phono (it doesn't use the pre-amp when switched to Phono) the sound quality, to me, improves BUT it is not grounded (the TT does not have a ground) and I am not hearing any real hiss or hum..Is this okay? Will leaving it not grounded create issues? I've considered buying a ground loop isolator, should I do this?? Thank you for reading!!