I just got my set of of the Pimax speakers to try on the standard strap that comes with the 8Kx, but I haven’t tried it yet. I am still using the HTC Vive DAS which is just more comfortable, especially with a much thicker Vive replacement face pad (18-24mm) and a Vive Forehead pad. The Forehead pad doesn’t really fit too perfectly with the Vive face pads, but it does work with 0 problems.
This for me is much more comfortable - however, like the straps that come with the Pimax, because the HMDs themselves are SO wide, the hinges are attached really far apart, which means the DAS speakers will JUST make it to my ears, and stay put, without springing back out. The reason is the because the HMD is just so wide.
Thats why people are asking for side pads on the standard strap - its simply positioned way too far out on everyone’s head. The standard strap makes 0 contact on the side of my head. I can only image that Pimax speakers are going to be just as hard, if not harder to get PROPERLY near my ears.
So my suggestion is - start over and redesign the strap from the ground up. Start off with the Vive DAS and redesign it to better fit your extra-wide HMDs and use your speakers.
In the meantime, having super-thick pads available to put on the side of the strap, to hold this on your face properly would be a decent stop-gap measure.
I’d also suggest making better overall FACE PADS, that have variable thickness - ESPECIALLY for the CHEEK BONE area, not JUST the forehead.
I can’t use any of the various face pads made by Pimax, no matter how thick, because none are thick enough, especially on my cheekbones. The only thickness difference I THINK I can find is MAYBE in the forehead? I don’t know, but I literally can’t tell one Pimax face pad from another.
The only thing Pimax on my current Pimax is the HMD. Everything else is after-market, or modified.