Ok I have some high impedance headphones HD650 300ohm. The speakers I have are analog 5.1 surround Logitech Z-906. Now the speakers crackle a lot when hooked in via optical cable.
The front headphone jack does not seem to want to power the HD650 headphones. How can I connect all of these and get the correct impedance and great sound? The back green jack will power the headphones fine but then I can't plug in my green speaker cable. Not having any luck so far, any guidance would be appreciated.