Noise Cancelling mode is basically what they sound like when properly amped in passive mode - but there's no hiss.
Your Sonys are just easier to drive, that's all.
Lots of hard-to-drive headphones don't reach their full potential without an amp. Noise Cancelling mode is basically what they sound like when properly amped in passive mode - but there's no hiss.
Oh well - I can only speak from experience. Without proper amplification the NS1000s (in passive mode) are slow in response and badly controlled. One way to describe it is the bass decreases in quality and overwhelms the other frequencies.
And different amps really do make a lot of difference to them.
) and the headphone surrounds are much smaller than my Zalman or my DR150 so my big ears feel a little cramped. NS1000 - I find the sound is more muffled and muddy with NR on when using the FiiO so works better in passive. Plenty of nice clean bass.
As for comparing them, it's a bit hard since the NS1000 are just being broken in and the Dr150 had hundreds of hours.
What is NR? Do you mean there is plenty of clean bass with the noise cancelling on or off?
I thought you have only had the DR150 for a few weeks?

I find the sound cleaner and the bass better with noise cancelling off but I have only tried so far using my amp. Perhaps without the amp things would be different?

Volume 100%?
I have only had mine up to 60% and that is defeaning! I tend to game and listen to music on 25%.
I find dolby headphone - small room, 8 channels and 7.1 shifter gives me the nicest sound that I prefer but personal taste.
For just music I prefer 2 channels and no dolby headphone though.
Tried them in again in the essence headphone port then my amp. In the headphone port on the soundcard on max volume they sound the same as my stereo amp on 8o clock with noise cancelling turned on.
Amp starts at 6o clock so the obviously puts the soundcard amp to shame