As per title, Asus STX - OPAMP swap for RCA to AMP audio output. Im fudging around with OPAMPS. Found half a dozen in a draw I forgot about. Problem is, I've forgotten about them. I use ASUS STX's to output audio to both headphones and amplifier for 'room sound', switching output in OS / Software. When I swap the OPAMPS in the STX, I usually just swap 'the two' towards the rear. What is the one in the front towards the outputs? Is that the RCA output? If I want to change the sound going out via RCA to my external amp, then am I going to notice any difference just swapping 'the pair above and below each other' towards the rear of the emi shield? If I'm changing OPAMPS then really I need to change 'all three' don't I? Haven't done this for years and don't remember ever changing the stand alone 'forward' one, only the pair above and below each other. Tips appreciated. Flaming okay as long you actually provide some useful information. EDIT: I should be ordering three OPAMPS of the same type at a time, not just two, shouldn't I?