Bumping for visibility of the below.   Quote:

Okay, so I have a question about the headband adjustment mechanism. On one side, it's become very loose and the system essentially doesn't grip onto the dots very well, sliding up and down too easily and often by accident.   Anybody had this happen or have any ideas on how to fix it? I figure...

The mathematics are covered in a DSP course and are clear and unambiguous.   This is the result with that perfect sinc (brickwall) filter. Keep in mind that the sinc filter has infinite support and is non-causal. The correct output now depends on values potentially infinitely in the future...

Sorry, I tried searching but didn't readily find the answers I was seeking, and I figure some of you may have a better perspective anyway. It's been a while and I'm out of the loop. Thanks.     Anybody know Can the E11K be used while charging? My understanding and recollection was that the...

More likely a measurement artifact than anything else. How many runs for each source did you do?   I mean, you can also measure the electrical output of the amp while it is driving those headphones.

So what's the channel tracking like? Technically this is the type of thing that wouldn't be that hard to get a decent ballpark estimate on via loopback testing via an audio editor or actually I think even the RMAA calibration, but a general impression is fine too. Any noticeable problems in...

  For methodological purposes, how about four tracks? Two with HOT and two without. That way there's repeatability and we can see if something in the test changes between two runs.   Or make it a ABXY by labeling A as with HOT, B as without, and X and Y being unknown, so people can try to...

  The E17 is not capable of anything close to 1 W (1000 mW) output, so you couldn't have put that much into the headphones. The amount depends on the headphone impedance, volume setting, input level, etc., but suffice to say, it was not near the limit, whatever physically that really...

I mean, seriously, if you designed and oversaw manufacturing of a great new product (much less one never been conceived before) and saw skeptics maligning it, wouldn't you explain how it works and part of the process? I mean, you would have to keep certain details under wraps, but resorting to...

  This is really a gross oversimplification of little value, but if you were to place HD 800 and LCD-3 on an axis, HD 650 would probably be somewhere in the middle in most or some respects and not way off either side. Except in price. It's definitely less expensive than the other two!

  There are some things the amp could do that may impact how soundstage is perceived but that would involve intentional deviations that would result in different things for different headphones. Definitely one thing it could do would be to have some series resistance on the ground return, for...

Well said, bigshot. Some people know of the above but don't believe it, but a lot of people don't even realize what's going on. Some speaker / headphone measurements and at different positions really should be a wake-up call.       Now you're making me wonder how many times in the history...

In lieu of any technical response from the company...   From the Facebook page: Good to know.     Well, we got some nice spectrographs out of this adventure, anyhow (and by "we" I mean we're totally a team of other people spending money, other people using their time, other people using...

  Cool. Nice to see.       Guys, could you help me out here? I haven't read audiophile writing in a while. Everything else aside, what do people even mean by "opacity" in this context? I guess an actual crossfeed circuit would definitely not be audibly transparent and so could said to...

Sorry, only have time for a quick skim through, so this response will be shallow, but you use the headphone output compared to the balanced line output of the same device?   I'm pretty sure you'll find the output impedance to be different for the two outputs (and probably not the balanced...