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Posts by zilch0md

 Dunno.  I would write them and ask.  Here's the contact page:  http://metrum-acoustics.com/ContactEN.html
 Except perhaps the possibility that this might be achieved at more than one gain setting?  In which case a lesser gain setting might be preferable for reducing the noise floor?
@Lohb   And, by the way, you should write iBasso and ask them if they have any spare part cases for the PB2 lying about.  For real.  They sent me a top and bottom - no end plates, for only $20.00 U.S., shipping included.  That was about eighteen months ago, so I don't know what they still have in the way of inventory, but it's worth asking, and that way, you can try anodizing without risking the original parts.  
 Hey, good job on getting rid of the 4th pin.  Replacing the tape is a nuisance, for sure. In Europe, there are several people who really like this product for accomplishing the same thing - the SBooster VBus2 Isolator: https://www.sbooster.com/sbooster-tweaks/sbooster-vbus-isolator?language=en Unfortunately, they refuse to sell directly to wanna-be customers in the States, but you can ask them for the contact info of a "dealer" here in the States who will do business with...
Here's an interesting white paper from Sparkos Labs (for the very curious): http://sparkoslabs.com/audio-op-amps-gain-seek-bandwidth/  Mike
 Wow, those sit really close to the exposed gain pins, but I guess nothing is going to move about in there, so if you were going to have a short, it would have happened already.  In truth, they fit better than the Sparkos SS3602, but I would want to use the high gain jumpers.   :-)
 Hi Lohb, Yes, I always use dummy buffers in the PB2, when using it with the HD800 or with my recently acquired DT880 600-Ohm (modified by BTG-Audio to use balanced cables).  I would love to have the current gain offered by using "real" buffers in the output stage, but the noise floor is always lower when I use dummy buffers - as heard with highly resolving headphones. When using the LCD-2 rev.1, HD600, and HD650, for example, I cannot hear the increase in noise floor that...
It seems as if the calibration only adjusts frequency response.   This paragraph is interesting:  Do these headphones have an internal DAC/amp?   (I suspect they do.) Can they only be used with iOS and Android devices?   (It seems so.) The only way they can calibrate the FR to a given listener is to perform the calibration using the same DAC/amp that will be used when later playing music. They're pulling the calibration tones out of an app on your mobile device - digitally...
 Thanks for your clarification!  I'm perfectly OK with your impressions, as we are not making an apples-to-apples comparison - different gear, not to mention different ears. In the end, as with almost all audio components, prospective buyers really have to make whatever comparisons they are considering - on their own.  There are very few audio products that have acquired a truly majority consensus of positive opinion - as with the Uptone Audio USB Regen, where even though...
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