1markr, guys,
Here is what you are looking for regarding the RCAs:
I asked Yazaki-san how he planned to construct the interconnects, as there are a couple of different conventions for connecting a shielded two-conductor cable to RCA plugs. Yazaki-san told me, “One conductor is connected to the hot of the RCA plug. And the one more conductor is connected to the grounding of RCA plug with the shield of the cable. In my opinion, the audio signal has AC component, overlapped with DC component and AC current flows forward and backward. And so the conductor to the hot could flow AC forward current and the other conductor to the grounding could flow AC backward current under the same condition. And also grounding, one conductor and the shield could bring out the lower impedance for grounding.”
So in Yazaki-san’s method, one conductor goes to the RCA pins (hot), the other conductor goes to the plug housings (ground), and the shield is connected at each end to the ground. This is a little different connection method than is traditional here in the USA, where the norm is to connect one conductor to hot (pins), one conductor to ground (plug housings), and connect the shield only on one end (normally the preamplifier end) to the ground. Connecting the shield to ground on both ends has some potential risks, decreasing the effect of the shielding slightly, creating the possibility of a ground loop in some applications, and creating the possibility that noise voltages or currents from the shield can get on the signal conductor (Henry Ott, Reducing Noise in Electronic Systems, second edition, page 58). However, I found no issues at all with Yazaki-san’s connection method in my system, and as you’ll read in a moment, it sounded fantastic.
Here is what you are looking for regarding the RCAs:
I asked Yazaki-san how he planned to construct the interconnects, as there are a couple of different conventions for connecting a shielded two-conductor cable to RCA plugs. Yazaki-san told me, “One conductor is connected to the hot of the RCA plug. And the one more conductor is connected to the grounding of RCA plug with the shield of the cable. In my opinion, the audio signal has AC component, overlapped with DC component and AC current flows forward and backward. And so the conductor to the hot could flow AC forward current and the other conductor to the grounding could flow AC backward current under the same condition. And also grounding, one conductor and the shield could bring out the lower impedance for grounding.”
So in Yazaki-san’s method, one conductor goes to the RCA pins (hot), the other conductor goes to the plug housings (ground), and the shield is connected at each end to the ground. This is a little different connection method than is traditional here in the USA, where the norm is to connect one conductor to hot (pins), one conductor to ground (plug housings), and connect the shield only on one end (normally the preamplifier end) to the ground. Connecting the shield to ground on both ends has some potential risks, decreasing the effect of the shielding slightly, creating the possibility of a ground loop in some applications, and creating the possibility that noise voltages or currents from the shield can get on the signal conductor (Henry Ott, Reducing Noise in Electronic Systems, second edition, page 58). However, I found no issues at all with Yazaki-san’s connection method in my system, and as you’ll read in a moment, it sounded fantastic.