Originally Posted by KLJTech
The X3 sounds great with the B&W P7.
Yes they do, but he asked about open back headphones intended for indoor use.
BTW, I auditioned the P7's directly against the NAD Viso HP50 with my X3, before I sold it, and ended up purchasing the HP50. It was a tough choice, but i thought the NAD's were a very slightly better match overall for the X3, with the P7's being just a little bloated in the bass regardless of the tone control settings on my X3 andf very slightly veiled sounding in the mids. The fact that the NAD's were $100 cheaper doesn't hurt either, although that did not factor into my decision. If I had felt that the P7's were the better match I was completely prepared to and would have shelled out the extra cash. In any event you can't go wrong with either headphone with the X3.
Now that I own the X5 I think the choice could very likely be reversed if I were to demo the two headphones head to head again, but this time on the X5.
This is not to say that the HP50 doesn't sound good on the X5, they certainly do, but the bulk of my files are hi-res, so no EQ available on the X5 and at the flat setting the combination of a slightly bass shy DAP and a slightly bass shy headphone adds up to a somewhat significantly bass shy combination. Not devoid of bass by any means, and not that I am a total basshead, but honestly low frequencies are meant to be felt and heard so bass should be deep, very deep and resolute. The X5/ HP 50 combo just doesn't quite get there bass wise for me.