If you crank the volume up loud enough you probably could but i wouldnt recommend listening to them that loud.

I tried them briefly but they were way too sibilant for my tastes, i also didnt find them very comfortable. Its hard to make a comparison based on my brief listen but i will say theyre a lot brighter and the mids sounded more present, i found the mids on the dj one pro to be a bit too recessed.

The 750 is the brighter sounding model, i wouldnt say its a lot brighter but its noticeable if you compare them.

The pro900 is best for bass. If you want something cheaper the hfi-580 / DJ1 also have great bass. If you want to go higher up the sig dj is great, not quite as bassy as the pro900 but better sounding overall.

The 414 pads gave a more open airy sound but lacked bass and sounded a bit thin for my tastes. I tend to prefer a thicker sound in general though.

No i never tried that, i found the 414 pad placed the driver too far from my ear which reduced the bass too much. The stock pads were too thin and gave too much bass so i had to experiment with a few pads to find one with the right thickness. Sadly my portapros headband is currently broken so i...

I found the 414 pads to be a bit thick which reduced the bass too much for my personal tastes. I ended up using some 50mm foam pads which were slightly bigger and thicker than the stock pads and gave a more balanced sound.

Ive been waiting for koss to do this for ages but sadly nothing yet. Ive had to make do with the sony sbh60 which is what i hope the wireless portapros would be, sadly the sonys do not sound as good.

Oh yeh i defintely agree the PP sound is better than beats. Perhaps using the frame from a cheap knock off pair could be an option.

The on ear beats (solo 2) are already pretty good sounding i doubt putting the koss drivers in will be any better

As far as im aware ldac is a sony only technology so i doubt the m2 will support it

Neither of the models are huge, the on ears are the smallest and most portable but people like me find them uncomfortable so will go for around ears instead. The bose qc35 are more comfortable and offer better noise cancelling but the sennheisers sound slightly better. If i was commuting...

If you referring to how they're tuned then no, they are not the same. The on ears are more bass heavy but still sound very good.

If you love the custom studio you will love the dt1770.

what are you driving them with?