I wonder how comfortable they are ...

Yes, it is very dangerous <D However as all problem it can be solved, I just happened to have special audiophile shampoo and hair gel which will protect your hair from cruel effects of headband usage and also improves sonic performance. After using this combo surely soundstage timbre and realism...

M50 have more bass but Shure 840 have more natural bass (not lacking at all) Shure's soundstage is little better. Shure has little upfront sound detailed vocals and on your face, Audio-technica is little warmer side. For my music I prefer Shure but keeping both.

Yes absolutely sure, I have listened and owned all of them besides HD800 and I can tell you all of them have bass distortion problem. Including HD700. there are people who like this effect because it reminds old days and tube amps and there are some songs which are nice to listen with these. For...

It means that HD558 driver is not accurately damped and you will hear some resonances. see more here: http://www.innerfidelity.com/content/comparison-beyerdynamic-dt-880-32-ohm-dt-880-250-ohm-and-dt-880-600-ohm-headphones   http://www.innerfidelity.com/content/how-headphone-dynamic-drivers-work

Nope, waiting also ...

  Depends what you seeking quantity or quality? in terms of quality HD650 is not shining already, so I guess HE400i would be better. I will receive them soon I hope and will comment further   cheers

I personally prefer Shure SRH940 over M50 (not X) and many more headphones, research about Shure SRH840 since it is more bassy but for $70 M40X would be fine   Cheers

As soon as I receive HE400i I will write comparison, I am curious also   having 600 ohm version

I will also write a review, using mainly ODAC O2 or Schiit Modi, Audioquest dragonfly. Lets see how they compare HD580, AKG Q701 and Beyer DT880.  

Very interested to try new Hifiman He400i, never had planer magnetic headphone, just briefly listened HE400. I was impressed by bass performance however they seemed to be brighter side. Since I heard HE400i shares same planer magnetic technology with its resolution speed and articulation...

Ohh that's crazy... on ebay.com I have seen HE560 for around $750... lucky US people

very lucky!!! for how much if it is not confidential

+1

I believe if you can afford you better go in HE560 route   otherwise wait for HE400i   I would avoid old HE400 due to high harmonic distortion problem better buy would be DT880 or Q701/K712   cheers

Grados-no way !!! bass distortion and roll of, plus non linear harmonic distortion... on ear, comfort issue to many to list hence not recommended!!!   If open back is must:   DT880 600 (ohm)  buy O2 Odac (if you want absolute clear bass) or Modi dac, avoid Magni good amp but bass is slightly...

That is a good choice while HD600 have better tonal balance Q701 have tighter bass and more resolution all over the spectrum. when EQ ed Q701 provides more hi-resolution sound.  I recommend O2 over Magni I had both, Magni has somewhat blurry bass.   cheers

Yeah quality and quantity is different things. Just play any well recorded music (classical, jazz) and you will hear clear difference in quality. Yes I do agree partially, AKG is little bass light. not good for electronic music   cheers

I mean compared to AKG Q701 and Beyer DT800 (600ohm) Senns have blurry bass, I was driving them with O2 or Magni with Modi DAC. However both Bayer and AKG have their issues. Besides uncomfortable headband (can be fixed) and famous 2K spike of Q701 (which could be solved by eqing) I believe Q701...

Sennheiser, I have owned/heard, HD518/558/598 HD580/600/650 HD700 HD25 1 ii   All open headphones of them have same issue blurry bass and somewhat confused sound, not clear separation and low resolution overall   HD25 was best Sennheiser I have ever owned

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NAD Viso HP50 is your best bet. Others could be Focal spirit one, and Shure1540, go to www.innerfidelity.com and read reviews.  If you need on ear Sennheiser HD25 1 II is great but fit sometimes is a problem, you should find sweet spot.   If you want cheaper go to Audio Technica M50X or M40X...

haha and after that he reveal again same thing...   OP you better get something different rather try some magic on 598 to make it likeable :D

OK I plugged them in and they work fine. huge thanks again !!! ideally if I want to drive planers I better buy at least 14-16 VAC at 400MA or higher?

My friend measured it, it is AC/AC adapter output is 13.97 VAC only problem I see is it has 1A, default triad has 200 MA, is it a problem ?