defective pre-amp


Bought a new C47 McIntosh and hooked it up to my Sony UPD800X DVD player.
I have a new set of headphones that are 103db sensitivity. I used a new Pangea Coax cable.
When listening thru the headphone Jack I get lower volume than normal and lots of hiss. I tried 2 DVD player and same thing. Any ideas? bad headphone amp inside or bad DAC? I am next going to try a different cable....
mwasilow

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