For me, I use headphones: Audio Technica ath-m40x because I heard that they have good all around sound without specific frequencies overpowering others. Other than that, I don't have anything noteworthy lol, just a crappy lenovo laptop and a piano that i'm having a hard time motivating myself to learn.
My headphones are very similar. I use the Audio Technica ATH-M50x headphones. I would use a pair of speakers to get a sense of how my music sounds on them, but sadly, living in an apartment means I gotta keep noise down, so I'm stuck with only headphones for now...
I originally started with Sennheiser HD 280 headphones, but I noticed that all my mixes were coming out with way too much bass, sounding muddy and muffled. I think its because they dont have a very good low end and I was compensating. When I switched to Sony the problem went away.
I Use the Sennheiser HD 25 Headphones for 20 years now and love them. A friend of mine who is (or thinks he is() a mastering ro told me that they are not good in the deep frequencies so I bought AKG 712 headphones some weeks ago. They are honest they say. At the moment they are just good looking. I have some TANNOY Active Speakers but I don't use them often.
headphones: JLAB bluetooth headphones or airpods, Monitor: School chromebook.