I purchased this on Mercari. I tried to use it, but I didn't know enough and the connector didn't fit, so I've been storing it. Below is the product description from that time, for your reference: Compared to the standard cable for the SRH1840, this cable excels in resolution, soundstage width, and smoothness. It also has the characteristic Saec vocal clarity, and of course, the imaging is excellent. The PC-Triple C used in the U320 sounds soft and somewhat lacking, but the PCOCC-A conductor of this U300 does not have that issue. This product is rarely available as a used item, so if you were interested, please consider this opportunity.