If you want to know whether the sub bass extends properly, go to onlinetonegenerator and see how low you can hear. This is one of the few headphones where I can hear/feel 20hz. This and the DT770 pro and some IEMs.
I do barely hear 20 hz, but only when I go from 22 ( normal listening volume on amp ) to max volume, guess that is to be expected maybe, or is there something wrong here?
30 hz is very easy to pick up compared to 20hz, around normal listening volume.
My 6xx pick up 20hz aswell when I get near max volume, though this is through the balanced output, vs m1060c on unbalanced output.
I've had some more time with these, and really appreciate the cleanliness that they present compared to my 6xx when the m1060c is running completely open, without any foam or grills on the outside.
Details are easier to pick up, and though the soundstage is not huge by any means, it is more spread out, and there is some more air between instruments compared to my 6xx.
Low end is the polar opposite between 6xx and m1060c, I pick up more details and nuances in the lower end, it's quite a different presentation.
6xx has more warmth across the board ( the warmth and bass seems somewhat bloated in comparison to m1060c ), but the warmth is presented in another manner compared to m1060c, and I don't think that the m1060c sounds dry or cold by any means.
6xx pinpoints the vocals more, though not by any huge margin, and pushes the vocalist in front of the rest.
m1060c doesn't do that, it is mid-forward and vocal forward when opened ( to my preference ), but the instruments aren't drowned or muted when someone is singing, and it's more "even".
I have to say, planar bass is really a different animal compared to the headphones that I'm used to with dynamic drivers.
I do notice that there is rumble going on, but I'd say it's more like a "feeling" of bass compared to a "sound" of bass.
I have mixed feelings about that, and to be honest I sometimes strive for that little extra bit of impact, tried to play around with some EQ with mixed results.
I do keep into consideration that I'm comparing an open back ( 6xx ) to a headphone ( m1060c ) that is closed as stock, but open now.
Though, I'm just comparing to the equipment that I already have on hand.
I'm currently running unbalanced on my loxjie P20, unbalanced in, unbalanced out, as I'm still awaiting my balanced cable from Amazon for these headphones.
How this will affect the sound, I'm not really sure, but the unbalanced output on the Loxjie hasn't exactly been given rave reviews, and has a lower power output compared to the balanced output.