DAP AMP Interconnect Question

That cable has two wires inside and a shield. Just nice for a single channel RCA interconnect. One wire for the L or R signal, the other wire for the ground, and the shield connected to ground at the source only.

But you're probably asking about a 3.5mm TRS stereo interconnect instead. Your cable can still work for that. One wire for left/tip, one wire for right/ring, and the shield as ground/sleeve. The shield should be connected at both ends in this case. However, while this is one possible way to do things, it is to my knowledge not the recommended way. The shield may not function as effectively as a shield anymore, and it may also result in more capacitance in the cable. For very short lengths though, it probably doesn't matter.

TL;DR version is yes you can.

what pray tell is the point of connecting the shield of an rca interconnect at one end? think about that for a moment, there are only 2 terminals on an rca connector, no separate shield, thus the shield is connected at both ends regardless. i see this recommended a lot, this advice is a hack for xlr interconnects if you have ground issues, with rca is makes no difference as there is direct continuity between the shield and ground, as they are directly connected to the same terminal. Any interference picked up on the shield will be connected to ground at both ends, not connecting it at one end will just mean it travels back up to the end its connected at and then up the ground wire.

My knowledge on this is far from complete, but here's how I understand it. I'm assuming that the RCA cable already has a proper ground wire inside. Disconnecting one end of the shield prevents the audio signal from flowing through it, ensuring that the signal is only carried by the wires that were designed to do so. I recall reading that having the shield in the signal path adds to capacitance.

I agree that interference picked up by the shield still has continuity through the ground wire to both ends of the cable. But by disconnecting the shield at the end, the interference now has to travel up to twice as far along the cable length to reach the amp. Again, gaps in my knowledge here. I don't yet understand everything about how the AC audio signal is affected by interference on the ground wire. But I speculate that the added distance of the partly disconnected shield causes X% more of the interference to flow back to the source compared with RCA shields connected at both ends.