Thanks, always good to learn something.

The Gilmore Krell clone is probably about as well designed as it gets - a guy that knows what he is doing cloning a super expensive amp by a guy that knows what he is doing and had senior engineers to answer to.  I think the ksa5 guy is now their chief designer.   That 1.4V was just a multi...

That should be 60ma and 1 watt

The 12V was something I think I saw on superaudiofriends about some older harder to drive high end planars HE6, LCD2 or some such.  I had some recollection about the ksa5 not being best for those super hard to drive models, checked on a thread by Gilmore and he then contrasted running them at...

Sigma-delta dacs are often implemented with complex output stages.  For example the dac in my cd player takes output from two Wolfson dac chips, combines them with an opamp, puts it through both sides of another dual opamp and then through a buffer chip, with various negative feedback paths and...

I'm looking at investing in a ss amp kit of some sort and would like to get something that drives my he400s to their best, but also has spare juice to power more demanding planars that I don't yet own. I've built amps before and can do that safely, I just need some guidance on how to...

I've considered making a high frequ roll-off tone control as I mostly go from CD player to headphone amp to 'phones, trying a software approach sounds like a much better idea now I have the mojo.    Hifiman still worry me as a supplier of premium goods that are sometimes poorly made.   Think...

The details of how a dac chip are implemented matters greatly, for example a good chip will have separate power legs for digital and analogue plus a voltage reference, so to work at their best they should have three sets of voltage regulation plus additional decoupling right next to the chip. ...

Save up for a mojo, they are truly a generation ahead of the sigma-delta dacs that have been industry standard this century.  The chips in really cheap dacs will not be good ones and they won't be well implemented, which is something that really matter with dacs.  WHilst its not impossible that...

I've had HD580s for approaching 20 years and would really like a same but better upgrade, yet phones I've heard with more detail become more harsh, and to me the trade-off just isn't worthwhile.  I might be one those people that insist old gear is better, despite it being objectively worse...

Its possibly hair that gets through the foam and onto the diaphram.  I had the same issue with hd580s.  You just need to take the ear pad off, remove the foam and get rid of any hair.   https://www.youtube.com/watch?v=mM2Cb0De1Y8 on dismantling.    There are replacement foams, both official...

Commercial upgrade headphone cables are the worst value upgrade available, it should be the last thing throw money at, power supply upgrades for the headphone amp or digital source will have  much bigger effect for almost all solid state devices( most use low voltages and basic voltage...

Exactly, in order to do the measuring you need equipment that almost no one has, therefore its expensive.  Who has an ABX comparator sensitive enough to keep up with high end headphones?   Secondly you can feel sound that you can't hear, I don't know how people might process that.  I don't...

It doesn't tell you what the humans are picking up on though, you'd need actual people being tested and that repeated, the most complex component can't be assumed away.  Eventually it might become clear if there is an effect or not and then you could pursue just what people are...

But you have to control for the human element, thats the really tricky bit and why double blind tests are used at all.   Is a comparator available that can do minute diffrences in headphones, that would be a very specialised bit of kit.

List all the things you'd have to control for, then figure out how to do the controls to a standard that could be published in a peer review journal.  Then figure the costs of hiring pros to do the work.

A few years ago it was annouced by the EU that dietary supplements would have to be tested to a clinical level, it was estimated that this would cost £250,000( over $300.000) per substance, for each substance that health food shops stock.  I don't see why testing the interaction of people and...

To Tigzstudio I say that single core conductors sounding better in audio is a general truth, I've DIYed power and signal cables and built multiple headphone amps and done modding.  In every single application the single core/seperated cores beat regular cables.  If you get the chance look at the...

The changes made were  replacing the input resistor with same value Shinkoh Tantalums at £3.30 each and then Takman metal films for feedback and signal entry to mosfets, thats six resistors at 76p each, so about £10 woth of bits + P&P.  The effects were:   A serious removal of high fequency...

I just got a used Neco MOSFET, and on the first day tested the AC cupply from the wallwart and it was stable to a tenth of a volt, then repeated the test with a 18V Clairtronic toroidal that I had in an ABS box for another amp and that was not as good and the one included with the Neco.  So I...