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bhobba

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bhobba last won the day on November 30 2014

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About bhobba

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    Seriously DAC Addicted
  • Birthday 17/11/1955

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    Redland Bay
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  1. Hope you can make it Mark. But Mike may have one last speaker left in him after this - a high efficiency one using the Seas Exotic Woofer. Thanks Bill
  2. Due to the pandemic I have been unable to get down there to see the latest prototype. And even worse at the moment my car is in for a service where they discovered it had fungus all the way through the inside (not the engine). The mechanics can't work on it until that is fixed. I have a detailer coming out Monday week to get rid of it (they have something called a 'bomb' they are confident will do it). Nobody I know has never had this happen to them, and only one person has ever heard it happening to someone else. I did bump the left hand front of the car dodging a cat and have noti
  3. Hi All Just spoke to Mike yesterday. He is still working on getting it just right. The issue was the bass was not quite up to his standards. The rest was even better than my 'prototypes'. He has been trying all sorts of things then hit on the idea of trying a closed box. That fixed it. But it will now not go as low. To help with that he thinking of trying a Variovent which he has used before. and in his view produces the best bass of all: http://www.troelsgravesen.dk/Variovent.htm The quality of the bass is excellent, but it will not go as low
  4. Just had a bottle with New Year's lunch. Nobody, including me could believe how fresh it was. http://www.mwwines.com.au/museum-wine-shop/wines/wine-item/Birks-Wendouree/Shiraz-Mataro/Shiraz-Mataro/2002/00050008560200200001 Very fine crust- could go another 20 years - easy - amazing wine. Grange class - only even more concentrated. Can only compare it it to a Kays Brothers Block 6 in a good year - not that there are any bad Block 6's. Thanks Bill
  5. Interesting question. The presenter Rob Watts is working on his own ADC called the Davina for that very reason: https://www.head-fi.org/threads/chord-electronics-dave.766517/page-120#post-12376871 'Me too on the ADC (project code word Davina), its a project that I have been working on for a long time (actually the first prototype was in 2001). There are a number of key things happening that conventional ADC's don't do well - noise floor modulation, aliasing, and noise shaper resolution. The noise floor modulation issue was solved way back in 2001. Aliasing is a major problem - nor
  6. Hi Again People might find the following interesting: He explains clearly how many things people think make no difference do. Even listening tests with other engineers about differences in distortion levels, where both were below the level textbooks will tell you is inaudible. The engineers were not surprised they heard a difference, they probably had enough experience to know textbooks are not always 100% reliable (just conjecture on my part), but the degree of difference shocked them. He even explains why power cables make a difference - virtual
  7. See the Carver challenge: https://www.stereophile.com/content/carver-challenge He believes he can get any two amps to sound the same. So Stereophile took him up on it. He succeeded, but what he had to do is not just look at distortion etc, but use a nulling technique where things we could measure, but usually do not, are made the same for both amps. He got his Carver Amp to sound exactly the same as a more expensive amp. People then naturally ask - why don't you make your amp sound that way and undercut the price of the more expensive one. His answer is he
  8. Audio is an illusion - trying to trick the brain into this is real. Everyone's brain is different and what sends some into raptures, others go blah. There is a simple remedy for the situation. Have some friends over and ask them to bring their DAC's and have a listen. Make a day of it, and you will find out what suits you in your system, and if spending lots of money is worth it to you. I was once the DAC guy here buying all sorts of DAC's when released and it is interesting hearing differences. I have toned it down now, but a sponsor here, Gieseler Audio, has released a new DAC at
  9. I want to do a GTG first. That will likely be soon. Thanks Bill
  10. Hi All Just spoke to Mike - finally fired up the first prototype. It shows, his exact words, great potential, but still needs further tweaking for optimum results. Stay tuned. As soon as Mike thinks it is in a reasonable enough state I will brave the pandemic and go down for a listen. Thanks Bill
  11. Hi All As mentioned above Clay has finished my DAC but due to the pandemic I can't hear it. It is down at Mike Lenehan's factory like a lot of my gear waiting for the pandemic to ease so there can be a GTG and I decide on exactly what gear to have in my system - tons have been accumulating in the last year or so. Then there will be a sale on what I do not want. But getting back to the DAC, Mike couldn't hear it on his reference system because he is working on his new Magnesium speakers, so had to go over, with Clay, to Mike's brothers (Russell - he is helping Mike i
  12. Actually the best amp I have heard is no amp - its the DAC output stage of the Chord TT2 - it produces 18W. But while digital it runs at 5bit 104 Mhz. But since some like verification of these sort of claims I found the following: https://www.audiosciencereview.com/forum/index.php?threads/chord-upsampling.9109/ I honestly believe it is the future - but they do need to get the power up a bit - I would prefer 50W - although on the speaker I used it on 18w worked fine. But when reproducing HT I have found they wind the dialogue volume down so the booms and bangs have better
  13. I did read somewhere he studied both electronics and math at a top UK university - but I too tried to find it and couldn't. I found a lot of references like the following where his ideas started at university eg https://www.head-fi.org/threads/chord-electronics-dave.766517/page-478 Thanks Bill
  14. I do not know about now but when I did my degree in math at the QUT 40 years ago now, we called it applied math as opposed to puerile math they did at the UQ (or was that pure math - like I said my memory is not as good as it once was) 😝😝😝😝. Don't worry - the pure math guys got their own back - it was all good natured - the truth is each requires the other. Thanks Bill
  15. Could be - my memory is not what it once was. Thanks Bill
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