E1DA Cosmos APU

What’s An APU The E1DA APU Cosmos Analog. As the name implies, this is an analogue device that serves the purpose of (pre)amplification with very low noise, also providing a 1kHz notch for accurate measurements of THD+N/SINAD as we typically see in DAC reviews. Using the combination of APU + ADC, the user should be able to peer down into the noise limits and measure characteristics like dynamic range, and THD+N/SINAD with great accuracy even beyond the limits of modern state-of-the-art DACs. Great function, Top Performance This is an analogue signal amplification + notch filter device. It has a USB-C port in the back for 5V power. When plugged in, a small amber LED beside the USB connector will light up to tell you there's power going in. It has four 3.5mm TRRS phono jacks to plug in cables for signals in and out. The 2 main functions are: low-noise pre-amp on the left which provides an ability to amplify low-level signals with +34/60dB gain, and on the right, a -30dB notch fil