Easily the best and most significant sonic tweak one could ever make!

@electroslacker Appreciate you relating this story. We often fail to appreciate that which we take for granted.

No feedback, no distortion other than that of the head betwixt...*G*

I've been fitted for 'in canal' pieces with the receiver/driver 'on ear', the only issues being my glasses (nearsighted) and removal of the au courant' maskings...

Reasonable comfy, although my Q-tip use has gone up....*L*  'Before and after' install in ears just feels good to do....😜

I'm wearing them f/t, as my speech recognition was a main issue w/spouse and conversation in general.  As for listening to music (or what I listen to, which is subject to discussion...), they stay in.  Otherwise, the eq would be 'ideally' warped to my ears, and sound wierd to others.

The only limitation I'd note is the limits of the 'on-board' eq, which is really pretty basic.  But hoping for 1/4 octave eq in a h/a is a bit of a stretch...;)

Overall, I'm pleased.

MC, I'd agree on eq'd headphones with a dedicated amp for the 'serious listening hour(s)', but a bit of overkill in some ways....clunkly unless Bluetoothed...one can forget you're wired into the stack.  Nothing like having the cans yanked when you're trying to reach that which is 'just out of reach'.  We've all been there at some point. ;)

And, even then, you'd have to corelate your 'loss' with the eq you need.  Do-able, but again, subject to taste and preference, which may not end up 'correct' in an audio sense....

'Practical vs. theoretical', yet again...*S*

Interesting discussion. I am close on getting hearing aids but have a question of principle understanding:
The hearing aid - from a principal point of view - consists of a microphone, an amplifier and a speaker. If you listen through this device, doesn't that have an influence on the sound quality, i.e. isn't what you are hearing the sound quality (?) of the earpiece rather than your hifi system?

@agosto.  The answer is no. I forget how it was explained to me by the audiologist and doctor, but basically the HA needs to be programmed /calibrated/EQ’d whatever the right technical term is to fill in or raise the volume at the frequencies that are no longer audible.  Like having a volume control at those specific frequencies, for me entirely at the high frequencies where I couldn’t hear anything to begin with. And it’s very simple to do an a/b with or without test to see and the results for me at least were startling - it fills in the missing information you aren’t hearing to begin with so it’s not altering the sound and if it was you wouldn’t know cause you can’t hear it to begin with lol.  
Someone else may be able to explain better or talk to your ENT. 

AJ, Thanks for the good post. Could you pm me as well?