You technically can connect the BDP-83 to a power amp, but it isn't really optimal. The volume control in the BDP-83 is nothing fancy. You also would need to have a video display of some sort connection if you are doing anything beyond playing CD's and SACD's.

If you really can't comfortably add six cables for analog audio (since you've got a 5.1 setup listed in your sig) in addition to the HDMI video cable, you can use optical or coaxial as a fall-back solution. Having spent over a year with the BDP-83, though, I would be remiss in not suggesting that at least $10 (for three pairs of MonoPrice cables) as a good, modest investment to maximize your enjoyment.