Absolutely not. The Auzentech sound card has a much more powerful amplifier.I'm coming from a broken auzentech forte (they never sent me back my rma card wtf), will the DGX be comparable to the headphone amp on the forte? It's the only part of the card I used, I just want my headphones to be loud.
The DGX requires no external power and its amplifier did a good job of giving clear sound to a Sennheiser PC350 headset (150 ohms). We did have to change the amp setting to high gain in order to do this. The amplifier on the card though was simply not as loud as the Phoebus'.
So you will have very good, clear, loud audio, but not as loud as much more expensive and capable cards like the Forte and Phoebus at identical volume levels.