I bought two but for one it's to use with a TV with a center speaker, so I bought a 3324 Banana Binding Post and replaced the two audio RCA jacks with banana jacks. Works like a charm to not have the cluttered look of using a double gang plate with two yokes.
PROS: Low price. Fits a standard Decora electrical plate so gangable to any amount you might need. The RCA jacks are interchangeable with banana binding posts for making a custom plate.
I bought a wall plate before this that came with hdmi, component(rgb) and optical coupler but I need the rca audio coupler. So, I got this plate to suit my need and instead of just one plate to handle the audio and video I now have two plates which is kind of a bummer.
Installation: The plate came with a pair of small screws and another pair of long screws as you can see from the images from the product page. It is said in the knowledge base that a gang box or wall bracket is required for installation and I had neither. I just chose the long screws and screwed the plate directly into the drywall.
Possible improvement or addition: - Make a wall plate with hdmi, component and rca OR - Make a wall plate with hdmi, rca and 3 prong power
If we are hiding our audio and video cables then most like we are also hiding our power cable from our tv set otherwise theres no point hiding everything if you still see a cable dangling down the wall. I used my trusty dremel to cut out a small hole in the plate to run the power cable through the plate and although it doesn't look as clean but it will have to do for now.