Hi, I'm trying to get the Dt 770 pro but I do not have an audio interface/amplifier. Hence I have to get the 32ohm version which I am wondering if it's gonna be any better than the ath m40x. It seems the 32ohms are not as good the 80 and 250 ohm versions or ?

 

get an mdr7506 instead. beasts!

 

My DT770 250ohm is loud enough on ANY source. Even small MP3 player.
And yes, 250ohm version is better.
DT770 are very durable too, with ALL parts online to repair them.
You can buy them second hand with confidence (serious seller, of course).

mdr7506 is good too. But totally different beast.
A little less sturdy AND a little less "accurate".

Some REAL numbers (and not biased views) :
https://www.rtings.com/headphones/t...ic-dt-770-pro/386/440?usage=19&threshold=0.10

Nothing to say about ath, no experience.