I used the Gigaport for years. I bought the Audio 2 to have a smaller card. Overall, I think the sound quality is about even....when the cards are balanced to putting out the same volume. The Gigaport uses the -10dBv reference, while the Audio 2 is +4dBu. The Audio 2 will get much louder.
At this point, I use the Audio 2 exclusively at gigs...the Gigaport is on permanent 5.1 duty on the tower PC.
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