I am currently using Beyerdynamic DT 770 Pro 80 Ohm headphones that are connected to my Logitech Z333 audio control, which is connect directly, using a 3.5mm audio jack to my sound card.
My friend recently told me, after he got some good headphones, that a DAC seriously improved the sound through his headphones.
I am looking to buy a DAC for around £50, possibly £100, and maybe £120+ (since I am not much of an audiophile to be honest, I just want the most out of my headphones), so it really depends on if the extra cost really would show significant / valuable change for me.
1) I really don't know how to set a DAC up whilst mixing my speakers and headphones with it.
My speakers are connected using a 3.5mm jack, but have RCA connections too. I also want to use my headphones. How would I go about connecting what to what, and using which connections / cables?
2) What would be the most valuable DAC for the price range given above, whilst being able to connect all my devices shown above?
3) Are DACs / AMPs definitely worth it? Considering the fact I love listening to music, watching movies and videos and playing games that require good listening. I heard that you can often hear more sounds that you couldn't hear before.
Thanks very much to anyone who reads this, any useful replies are extremely valued and appreciated.