I use all Purist Audio cables , they are large diameter and very heavy as well. The Purist can be pushed into position fairly easily, but then they want to spring back to their original shape. Although this may not be the exact situation you are dealing with, the fix I have found should work equally well for you. There are "tie wrap" pads, small white PVC blocks with slots that allow tie wraps to pass through in two directions. One of these stuck on the wall, rack, shelf or wherever the cable wants to "relax to" will provide support when secured with the corresponding tie wrap. These available at local hardware stores and can be removed. If the sticky back fails, there is a countersunk hole in the center of the block for a small wood screw to secure it. Probably not good for the furniture, but certainly usable for the rear side of shelves and even sheetrock. I have about two dozen in use in my system, and all my wire is dressed out and positioned beautifully, with none of the connectors trying to unplug themselves. Hope this idea works for you, the price is certainly right and requires only a small amount of labor to get it right.
Great sound but broken sockets ?
No doubt that the design and quality of AC cables affect the sound of Audio and Video equipment. I have piece by piece 'upgraded' my cable gear to the (in my opinion) best sounding models such as NBS Profs and Masters - but these monsters become so rigit, heavy and clumsy that they break sockets even of top audio equipment and just block me off to even service my beloved Dacs, transports, preamps, amps etc. Has anyone a recommendation for top sounding AC cables (irrespective of price) that are still managable (flexible) ?