I am not permitted to post there.

There are only 2 at Penon which appear not to be a modification. OURART Ti7 at 80$ with the balanced cable. Uses MMCX connectors on the bud. Reviewed here. and the Shozy BK with built in cable. I guess that is all that exists in the English speaking world. I looked on Amazon also. They are a mess.

My query is answered. They exist, ranging in price 10$ to 165$ .

There are improvements it is guaranteed to make. It would spare me the expense, storage burden, and hassle of multiple sets of cables. They would be for when I am in a quiet environment. CIEMs are for when I'm in a noisy one.

The frequency response of what sounds flat for a CIEM is not going to be the same as for a speaker though. For headphones, it looks similar to this. For CIEMs, it is a mystery (to me and most people).

Do earbuds for balanced audio exist? Something with detachable cables or an attached cable with 4 contact TRRS connector?

I do not miss crossfeed. -- so that is not an evaluation criteria for preferring loudspeakers to me.

It was good for the thread to include circumaural, but it is not of interest for me because I have begun wearing spectacles/glasses. What I could have included are earbuds. My Beyerdynamic headphones lasted about half a year. Afterwards, the padding was too compacted and long wearing hurts the...

How does sound quality compare for CIEMs and loudspeakers + amplifier in the 1000$ to 1500$ or € range? A pair of Bowers & Wilkins 686 S2 bookshelf speakers costs 900$ for example. Of course, you can buy used for loudspeakers. I am especially eager to compare new to make purchase ease more similar.

For new music, I advise not using MP3. It is a bad audio format. Consider adding balanced audio (differential signaling) to the sought feature list.

What duration of wait for a response to e-mail is how good? What duration is short and a good response time? What duration is long and a poor response time? What duration is an intolerable response time? On the subject of communication: I strongly advise against attempting to purchase from...

Does less metal in the tinsel wire cables compared to wire with litzes have a clearly noticeable effect on the volume of bass when used with IEMs? -- when used with around the ear headphones? -- through 20m long cable? Would it make a difference for recording microphones which get power from...

Onkyo is using 2.5mm balanced output in their newest player. http://www.eu.onkyo.com/en/articles/onkyo-launches-dp-s1-digital-audio-player-139556.html I will get such a jack on my cable for my new CIEMs.

That is part of the question. Another is: Are those the most recent players from those companies? Does the most recently developed by each support balanced audio? I already knew that using such an adapter could cause balanced audio to be lost.

Are the 'flight' jacks designed for balanced audio? It looks as if they are. They have 5 contacts: enough for 2 balanced channels and a ground connection. I don't know what thickness the plugs are. https://www.head-fi.org/threads/trs-plug-jack-layouts.381485/

Which audio player manufacturers are using 3.5mm or smaller connectors and balanced audio (differential signal) their current players? I am declined to purchase from a maker who is not using it in their most recently developed products. If they are not dedicated to balanced audio in their...