For asymmetrical or quasi-symmetrical analog signal transmission between devices with RCA inputs and outputs. The very low-loss and low-capacitance HF coaxial cable is sheathed in a basalt braided sleeve, even inside the connector housings, ensuring crystal-clear signal transmission. When the C-C-C50-BA is connected between the RCA output of the Audio Optimum NOS-DAC and the analog quasi-symmetrical RCA input of the NOS-DAC 2 (NOS-DAC + preamplifier), there is no audible difference for cable lengths up to approximately 2 meters compared to the identical DA converter built into the NOS-DAC 2, which is internally connected to the analog preamplifier via circuit paths just a few centimeters long! No other RCA cable – even those shorter than 0.5 meters – has passed this ultimate test so far. Other cable lengths available upon request. Please contact us.

For the asymmetrical or quasi-symmetrical transmission of a digital SPDIF signal. Almost independent of the cable length, the basalt braided sleeve provides a noticeable improvement over bare 75Ω coaxial cable, as significant as with analog signal cables. By design, the signal edges of the SPDIF signal are flattened by the cable distance, causing jitter when – as is often the case – the receiving SPDIF-I2S converter has too large and undefined input hysteresis. The Audio Optimum NOS-DAC, which intentionally works without reclocking, treats the incoming SPDIF signal as an analog signal and restores the flattened signal edges precisely at zero crossing using a fast analog comparator. This avoids jitter, provided that the SPDIF source operates cleanly and the cable transmits the digital signal in such a way that the edge flattening remains relatively constant and symmetrical, regardless of the data stream. In this respect, the basalt braided sleeve appears to have an extremely positive effect. Connecting a good CD transport to the Audio Optimum NOS-DAC via the C-C-C75-BA cable can convince even die-hard analog vinyl enthusiasts of the quality of digital music reproduction. Other cable lengths available upon request. Please contact us.