I think we’re straying somewhat off topic here, but as I have mentioned my ATC speakers as a reference to my sound impressions of the NDH 30 I think I should respond to you post.
First, Rob is correct in saying that I was comparing the NDH 30 to the HD 800 in post #3,767. None of my comments were about the sound of my ATC’s.
Second, I just
knew that someone (and probably you
) would say something about my room and the speaker placement after I posted the picture of the RH speaker. That photo makes it look as though they are right back in the corner, very close to the side wall and back wall, and as there are obviously no bass traps in the corner it looks like a recipe for disaster! I would almost certainly also question the speaker placement if someone else had posted that photo! However, all is not (as bad) as it seems!
To repeat myself, (and apologies for doing so to those who already know) I am a professional musician and life-long Hi-Fi enthusiast who enjoys headphones for fun, but for serious listening I sit down in front of the Hi-Fi. I do have a small 'studio' in an adjacent room, but that is really only (these days anyway) for the purpose of recording myself for other peoples productions. As such I use headphones for tracking (closed backs) and I occasionally do a bit of mixing, but not mastering. I leave those problems for someone else! The room were the ATCs are was built to be a music listening room - not a studio, so I allow it to be more 'live' than would be ideal or necessary if I were using them to master in a serious studio. And yes they are, as you know, certainly mastering grade monitors! The room dimensions are 7.2 x 4.3 x 3.0 meters (23.6 x 14.1 x 9.8 feet) - dimensions which were on the B&W website at one time as suggested ideal listening room dimensions. The floor is real wood parquet over solid concrete, but the walls are the traditional Finnish construction of wood frame and plasterboard with very thick insulation, so there is a considerable amount of bass loss through the walls. There is a large thick curtain on the front wall (behind the speakers) and also two thick 2 x 3 meter rugs on the floor as well as two large sofas, chair, various pieces of furniture etc and a large CD rack on the back wall, so it's a large but quite well damped room.
I have spent a considerable amount of time positioning the speakers and getting my listening position in the right place. I could have gone for the ideal situation of having the speakers placed far enough way from the front wall to avoid the problem of phase cancelation altogether, but this would have placed them so far into the room (I can't remember exactly what the placement would have been, or even the maths to do the calculation!) that I would have made the room impractical to use for any other purpose, and as I use it partly as a practice and relaxing room as well I decided to put the speakers closer to the front wall. However, they are not nearly as close as the picture makes them look! I can't remember the exact distances now, but the front axis of the speaker is carefully placed at a distance from the front and side walls that avoids any nasty phase cancellations or reflections. They are also toed in quite aggressively which all but eliminates troublesome side reflections - at least from my listening position. All problems which simply disappear with headphones - it's no wonder they have become so popular for serious listening! The speaker are 3.2 meters apart (measured from the central axis) and my head (ears) is 2.8 meters from the baffle, so I'm sitting slightly within the equilateral triangle. In this position the speakers can literally disappear and I 'see' the performers directly in front of me in the space between the speakers, or sounds can come from beyond the speakers left to right, and in any position up and down and front to back. Details and definition are off the scale.... It's quite an experience.
What doe this have to do with the NDH 30? I am not saying that the NDH 30s are as good as the ATCs - that would be a ridiculous suggestion. What I am saying is that of the headphones I have (and I mean the best ones which are the NDH 30, HD 650, HD 660S and HD 800), that the NDH 30 have the closest sound to the ATCs. By that I mean overall clarity and resolution (better than anything except the HD 800), naturalness of timbre and soundstage, bass response (although they go deeper than the ATCs) dynamics, punch, instrumental separation (again, the HD 800 is better still, but unnaturally so) and midrange presentation. I still think that they are quite a way ahead of the 6 series but manage that without losing any of the engagement, naturalness and correct instrumental timbre of, say, the HD 650. For what they cost I'm extremely happy with that.