Just have a general question. I just got a Marantz model 50 Integrated amp for my vinyl setup. I tried it today with a old set of ok quality headphones I had laying around and it was not that bad. Not shore on the quality of the headphone section on the Marantz 50 and if it could drive a decent set of headphones. I'm wondering since the model 50 has preamp outputs. Could i use it with a headphone amp. Asking because I was hoping to keep both my speakers and headphones hooked up and use the built in phono preamp in the model 50.