I have my Behringer C-1 condenser microphone plugged into an XLR cable, that XLR is plugged into my Nady SMPS-USB audio interface with phantom power, and a USB is plugged into the Nady and my Windows laptop. The Nady SMPS-USB is being powered by a replacement AC adapter for now with only 12 volts for testing purposes. An 18v AC adapter is the original requirement. The Behringer C-1 is lighting up red. The Nady lights are all on (USB and Power). When I record through Audacity, it has a really loud constant hiss. Turning up the recording volume just increases the hiss. I am able to record my voice, although it has very low volume. This audio interface doesn't have any knobs for gain or volume. Does it need a preamp software? Is this all because the AC adapter simply isn't powerful enough? Is it the audio interface itself? There's not many reviews on it.