Originally Posted by LuciferX
Thats the idea! Do you think that i gonna lose some quality? (Because im using a lot of adapters/cables)
I should clarify the setup a bit more so you have a better idea of what is going on.
You have two set of connections going to two different points but, when your using the headphones your speaker will be off. Full signal will be going to the headhones.
Now if you turn on the speakers you will have signal going to the headphones also, so you could always just disconnect them if it is a worry for you. Just use a longer, RCA to 3.5 mm cable so it is within easy reach.
I think you may need and external amplifer for those cans. Line level is not meant to drive headphones with high power requirments. If you did go with the external amplifier for your cans then the system basically works perfect.
If you use phones, you turn on the phone amp and run off the speaker amp.
If you use speakers, you turn ont he speaker amp and turn off the phone amp.
If the can amp is not something you need, you can get a in-line headphone controller.
There are many ways to do what your asking and this is just one of them.
Good luck with your setup.