This would really only be of interest if you run your bass wired and are using or looking into IEM setups (and aren't 100% sure of the details of available options). While there is a sort of intuitive attraction to wireless IEMs, I've found that running wired bass, on balance, leaves almost no practical advantage to wireless IEMs. There are individual advantages to either one, and how those come out on balance is a matter of personal preference, but that shouldn't be based on mistaken ideas about what is involved.
A number of comments I've seen make me believe that there are general notions floating around that wired IEM setups are more involved and cumbersome than they actually have to be. There also seem some naturally picked up misconceptions about what's required. I saw one comment that a wired IEM setup involving "a small mixer" was recommended; that one left me scratching my head. I'm aware of and briefly looked at the Jump Audio IMX system but it doesn't really make sense to me given the alternatives...I can see (while still considerably less that higher tier wireless systems) how some people might be turned off by the prices alone.
Wired IEM involves exactly what the name says; simply getting a wired signal to your ears. At bottom, this requires a headphone amp. Beyond that, there are multiple forms that the setup can take in terms of details of the configuration and cabling and in terms of cost.
My progression through this has been that I was using wireless for both my bass and IEMs. Over time, I found that wireless for my bass really wasn't doing anything for me, and overall, I actually preferred wired. I ditched my wireless bass unit but kept using wireless IEMs. Over time and with a couple of unfortunate incidents, I began to question that and not knowing too much about available wired solutions, I looked into it. I decided that using a simple (DIY) dual instrument/IEM cable made the most sense for me. The recent addition for me of audio over cat cable snakes makes it an absolute home run.
Since it seems like written descriptions and photos sometimes don't fully convey what's meant, some of the comments I had seen recently prompted me to try to share in a short video describing what's working for me. If you're considering wired IEMs but aren't sure what the various options involve or have come to believe that it's necessarily a cumbersome setup, this perspective might be of benefit.
(Edit: Based on comment prior to the post, I have considered having a volume control at my hip which could be done with an inline volume control (<$10 item) but I haven't felt the need. I generally use the volume control on the headphone amp during setup/soundcheck and on the control app after that. That's been sufficient for me.)