I have not used any of the assistive loops before. When the customer is at that stage, they have a doctor they are seeing about their hearing. And the doctor is usually recommending what products to use. I stay out of it at that point.

And, their deficiency will change over time. This is why an audiologist or other pro should take the lead. I had personal experience with one who would not wear his hearing aids, yet would bark at us, “don’t yell, I can hear you” (not).

With respect to the original question: if there is a level mismatch between the source and the wireless headphones, a line amp could help, but if the real issue is insufficient output capability of the headphones, the line amp could simply result in something being overdriven.

This was the exact point of my post. In fact, I did it one better by first confirming what the correct "keep it simple" would be: buying the suggested product.

Then I described what you might come up with as a solution if you hadn't known about the cheap product -- this is the SIB part of that.

So, what's the problem? Something "a bit" too long. A BIT?

I didn't mean that to be a challenge.

Maybe these would help-

https://www.weareeven.com/

Ernie, we love you because you always try to help.

When we try to nudge you along and say cut the wordiness, stay on topic, don't try to figure out ten different angles on what we meant to say, you go all casemore on us, and act like it's everyone's problem and not yours. Just Sayin'.

Which was not needed because no one ever suggested making it complicated.

You can beat some people over the head with it and they still don't get it. He is missing that gene.

Ok.

Sorry, I missed this due to all the other back and forth.

I have not.  Last time I used them was with some wired Bose noise cancelling headphones that a customer requested.  Technically this should work with wireless headphones, though I have a feeling you will need to adjust the volume down on the amp to keep the input signal from clipping.  It may not do what you want it to do.

Yeah, that’s what I’m worried about. The clipping is going to kill any gain from amplifying a signal that’s already been amplified.

If you can use wired headphones, a headphone amplifier is simple, cheap and common.

BTW- We do loops, and people with hearing aids love them. I've not heard of them going into residential, but I don't see why not.

Erik,
what do you mean by loops?

A few decades ago I worked for Califone, which makes (or made) language labs, and I ran across a loop product which was a loop of wire that went around the perimeter of a room and acted like the primary of a transformer. Presumably there were several "turns" to this primary.

The headphones of this system acted as the secondaries, having just a coil that would pick up the varying magnetic field of the primary.

This was a real product! I have zero idea how they kept it from picking up 60Hz hum... is this what you're talking about?

My guess is that the headphones couldn't reproduce 60Hz and they may have filtered that frequency out of the signal.

Add a capacitor and a couple contacts and you’ve got an invisible fence