the t.bone HP 66

I've got these as a part of the Yamaha E353 deluxe package and I have used them with the Yamaha.

Pros: The sound is excellent, very clear. The ends turn 90 degrees, hence finding a position which is comfy will be easy. I'm using them mostly on the keyboard as piano and the lows are clear enough.

Cons: They sit somehow artificial on the ears and they have the '90s feeling. This will not be an issue, as the sound is great and the ends are soft, but might have this feeling.

They arrive with the 6.3 adapter which is welcomed as these can be used on a keyboard or on any other device (smartphones, etc..)

I would recommend them for amateur use for someone who wishes to have few headphones pairs around the place at a low budget range.

I would not recommend them for professional use as I never had professional headphones before to compare, but they might be fine. Probably another member will be able to provide this comparison.

Amazing headphones!
Inexpensive, but the quality is 10 times better.
It was in them that I heard the characteristic overtones of my bass cabinet, which I hear in the studio when I play live.
So I put headphones ten times the price on the shelf and use these. Ideal for home practice: lightweight, one long wire on the left. I will buy them with every new purchase, I need these in stock.
You read a lot in the reviews, but these headphones are too cheap to refuse to test them, so buy them and most likely you will not need others to play on the couch.
A small drawback: they fit unevenly to the ears, they were made for special skulls))

I'm using them as TV/gaming headphones cause they are comfortable because of the light weight and they don't make your ears sweat like the circumaural headphones. I also tend to use them when going to sleep. It's possible to sleep on a side with these.
They've been accidentally sat on many times but using them when going to sleep may be what ruined them for good. Cable is still ok and the sound quality hasn't changed but they've broken on the thin spots where the headband is adjustable. You may fix them with a duct tape if that's acceptable for your aesthetical standards but I'm going to replace them with the same ones as soon as I'm going to make a new order. They've served me a good time, I've used to them and I think they are worth it to buy them again.
Also, it doesn't say in the description, but the ear cups are rotatable.