Quote: No, but that's not the problem anyway. When you're comparing DACs, one issue is the internal gain of the DAC. If took a tone at 0dBFS and ran the data to two different DACs, you probably will get different output levels from them which makes comparison impossible. If at least one DAC had a means of output level control so you could make sure both DACs reproduce identical levels, then you can compare them properly. bigshot suggested a preamp between one of the DACs to assist in level matching (balancing). Once you have both DACs level matched, you can connect them to your favorite amp.