Changing Op Amps on a Soundcard: Only affects headphones?

[Jimbaco]

Hello,


Just started experimenting with different Op Amps on a Soundcard (HT Omega eClaro and Asus Xonar DSX). I am wondering if swapping the PC's will change these sound on all channels (ie 7.1) or does it only affect headphone output? How about optical out? Any benefits from changing amps?

 

[Rogue Leader]

There is no benefit to changing OP Amps if you use optical out, since it is sending a pure digital signal (heck theres barely a reason to use a good sound card if you're using the optical out).

As for the benefits you should read through these sites for more info on op amps and what swapping them do:

http://nwavguy.blogspot.com/2011/08/op-amps-myths-facts.html
http://nwavguy.blogspot.com/2011/08/op-amp-measurements.html

The short version: Its a waste of time.

 

[jdlech]

The major drawback of any op amp is their low current capacity - which is relevant if you're driving a speaker directly, such as headphones or desktop speakers. It would have to be an unusual op amp indeed to get any improvement from optical output. However, ceteris paribus, an IC amp with a higher current capacity is notably better than one without. Especially at higher volumes.

In my experience, it's very hard to find any sound card that addresses the major problem with audio outputs; the common ground. The optical output avoids that problem, but then you need a separate audio converter/amplifier.