Well, finally got my HE-400 from Moon Audio (gladly recommended!) and have been listening to them with the velour pads.
I just gotta say I'm really impressed with these cans, coming from Sennheisers IE8 the first thing I noticed was how clear and natural the mids sounded. I've been reading a lot about the higher mids emphasis but have yet to find a song where this particular trait stands out enough as to bother me. I'm also amazed at how nicely the bass is reproduced, it doesn't have as much quantity as the IE8's (probably because the HE400 lack the eq bump @ 100Hz ) but it definetly is very tight and delivers efforrtlessly when the record calls for a deep bass. Regarding instrument sepparation, which was my favorite characteristic of the Senns, I can say that the HE blows them out of the water. It has this amazing clarity and separation to each instrument plus an airy feeling that the IE8's just couldnt produce.
I'm currently driving them with a Fiio E17 with Bass at +2 and Treble at -2 and have the feeling that, even though the Fiio is doing a great job driving them, I could get a little more out of these HP with a better amp.
Finally, I would like to recommend a few albums which sound nothing short of amazing with these cans:
- Beck - [2009] Sea Change (MFSL Ultradisc): This is a hell of an album.
- PinkFloyd - TSOTM (Black Triangle Edition - De-emphasized) : This one is easy to guess
- Dan Reeder - [2010] This New Century : This album really surprised me, the recording quality is superb and it is quite fun to listen to.
- Alice In Chains - [1996] MTV Unplugged: One of the best live albums I've ever heard, it is a must listen.
- Patricia Barber - [1999] Companion [MFSL]: Such great detail and quality around this recording.
- Paco de Lucía - [1987] Siroco: If you like Flamenco guitar, this is the album to hear.