Thick speaker cables to connect the top to the cabinet. I didn't notice any difference in sound quality between this and the instrument cable I used. But I bought them on the recommendation of a technician who suggested that (1) they were designed for a specific application, (2) they are less likely to fail due to the larger diameter, and (3) all of my instrument cables are fairly old and as far as they have a limited have a useful life, they may be nearing the end of that life. Also importantly, I can't think of why others like this, available as a single cable for around $15, could be any better than this one. This is an audio cable. All solders look good. difficult conditions. Small note: some other reviewers point out that something needs to be tightened up. They just say that the socket cover screw may loosen a bit during shipping. It's no problem! This is not at all a problem with the cable itself and nothing unique to this cable.
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