Lost all hearing in one ear, is it worth upgrading speakers?

Only you can make that decision.  None of us can appreciate your deprivation.

So very sorry to hear this
my great hope is that you can continue to enjoy music in any form that gives you happiness.
since you mentioned him, Richard Vandersteen volunteers with those impacted by hearing loss, indeed every pair comes with both a warning as well as an admonition to protect what we cherish. Richard picks up the phone, I know he has a mono rig and he might have some ideas. I can assure you he will not be selling just helping.
happy Easter
bless you
peace and grace
jim

Also, you might try pointing the existing speakers back at the wall and going for a wider more expansive soundstage - think 901 but with much better quality. If you preamp has a mono , phase and reverse switch. I would also experiment a bit w that functionality.
you might also try more corner loading - trading spatial cues ( from reflection) for more bass output....

So sorry.

I can understand and appreciate your situation.

My right ear - I can hear my wrist watch ticking if I take it off from across the room. I actually have to take it off when listening to music with quiet passages because I can hear it. 

My left ear - I could shove it into my ear and not a sound can be heard.

I do not have complete loss, but there is a constant ringing and some frequencies are completely  lost on me.

Not the same as your complete loss, I know

FWIW, I have found its even more crucial to have "better" sounding speakers and anything that has any kind of "fatiguing" quality to the sound becomes completely unbearable.

I have to request seats on a plane in front of the engines on longer flights as I find the noise far too annoying. Some frequencies...

It obvious, I know, but the only way you will know if its worth it to you, is if you audition whatever you are planning on getting in your own space.

Don't think the loss of hearing in one ear should negate you getting as much enjoyment as possible from listening to music with your one good ear.

Quick question. I know I have a really hard time finding my cell if it is ringing, as it is difficult to specifically locate where the sound is coming from. Is this the same for you? I have some sense of direction of sound i.e. from/rear and left/right but it is seriously diminished.

Again, very sorry for your loss. 

P

 

I have a hearing imbalance that bothers me when I just listen to music. But when I smoke a pipe while listening, I can just relax and enjoy the music (and the pipe).