The key attributes for sub cable are shielding and flexibility. WF100 is really well shielded; much better than a lot of the dedicated sub leads on sale. However, it's very stiff. That makes it more difficult to handle, especially trying to bend it in the restricted space inside a single gang back-box. However, if you can do that without kinking the cable then it'll work really well and for relatively little money.
Shielding is really very important with low level signal cables, and particularly where you want the sub to be quiet (no hiss/hum) when awake but not playing, and also where you want the sub to wake from auto-standby reliably. These are areas where poorly shielded cables fall down. Having well shielded cable and then soldering it to the tags on the back of a phono wall plate is like having a great burglar alarm but then leaving the front door open. It compromises the effectiveness.
If the back-box is metal and the phono wall plate is metal too then they can act as an extension of the shielding which isn't so bad. But if you're mounting in to plasterboard with a plastic dry lining box and the faceplate is plastic too then the solder tags at each end of the cable run are potential weak points. Whether it becomes a problem depends then on how electrically noisy the room and house are. Lots of devices now use switch mode power supplies. They can be quite "dirty". There's also all the energy flying about in the form of radio transmissions from Wi-Fi, Bluetooth, normal radio, PLTs etc.
One answer is a wall plate with a
phono socket back-to-back, but that then leaves you with the problem of how to terminate WF100 with a phono plug. It's do-able, but the catch is the length of the connection behind the wall plate; it fouls even the deepest back-boxes. A better solution is a wall plate with an
F-type back-to-back. I know what you're thinking "This isn't an audio connector" but honestly, that doesn't matter. F-types work just as well for audio and much better than solder tag connectors. That's not the end of the story though...
Terminating WF100 with a screw-on F plug is a piece of cake. What's more, it maintains perfect shielding all the way to the tip of the lead. The other advantage is there's a nice littlie line-up of F-type adapters. This includes
90 degree F connectors and
F-to-phono adapters. This makes the back of the wall panel connection much easier, and you could also use the same right-angle plug at the socket front to have the sub cable go down the wall rather than sticking straight out. You also get to use WF100 all the way to the sub for great shielding performance.
