This is a review and detailed measurements of the Sound BlasterX G6. I purchased it last month for USD $150 from Amazon including shipping.
Typical of PC audio connectivity devices, the Sound BlasterX G6 is a combo device which includes an audio DAC, ADC, and headphone amplifier. This being targeted towards gamers, there are a lot of specific features in that regard which I did not test. My focus here is the pure audio performance.