I am over the moon about these Koss 4AAA stereophones. They seem to have never been used. Came with the model 16-168 case, and all cords are pristine.

They sound amazing. I’ll include more photos, including of docs/inserts/adverts, in a comment.

The ear pads are intact and holding their oil fine. They’re pretty stiff, though, as they’ve hardened a bit over time.

I’ve heard you can use Lexol leather conditioner to soften the ear pads, but I’m scared to try. I don’t want to harm them.

What do you think?